| Relationship Between the Ductility and Impurity Hydrogen in Ni3Al |
1995 |
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| Authors:
R. Chikaizumi; G. Itoh; M. Kanno; H. Okada; TOKYO UNIV (JAPAN) DEPT OF METALLURGY AND MATERIALS SCIENCE
|
 | This paper concerned metals in some important way and contained information about, utilized, or discussed these subjects: basic topics: experimental materials and material types: ni3al materials related terms: boron addition, ductility, elongation, fractography, grain size, polycrystalline, reduction of area, transgranular fracture, ultimate tensile strength, voids processing: annealing, induction melting, isothermal forging miscellaneous and special technical terms: intermetallic compounds. |
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| Precipitation Behaviour of 7000 Alloys During Retrogression and Reaging Treatment |
1994 |
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| Authors:
M. Kanno; I. Araki; Q. Cui; TOKYO UNIV (JAPAN) DEPT OF METALLURGY AND MATERIALS SCIENCE
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| Heterogeneous Precipitation of Intermediate Phases on Al3Zr Particles in Al-Cu-Zr and Al-Li-Cu-Zr Alloys |
90 |
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| Authors:
M. Kanno; B. L. Ou; TOKYO UNIV (JAPAN)
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| Heterogeneous precipitation of intermediate phases on dispersoid particles of Al3Zr was studied in both Al-4Cu-0.18Zr and Al-2Li-3Cu-0.15Zr alloys; special attention was given to the coherency state of the particles which might change during solution treatment through recrystallization; specimens were solution-treated, then directly aged at 473 K without quenching to prevent the formation of dislocation loops which can act as the heterogeneous nucleation sites for intermediate phases; the dispersoid particles in ... |
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| Recrystallized Structure of Cold-Rolled Al-Zn-Mg-Cu Alloy Sheets Containing Cr or Zr Affected by the Structure Before Cold-Rolling, |
FEB 1987 |
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| Authors:
G. Itoh; B-L. Ou; H. Suzuki; M. Kanno
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| Al-5.5Zn-2.4Mg-1.5Cu alloy ingots containing 0.27Cr or 0.13 Zr were subjected to different treatments, cold-rolled by 53%, solutionized at 470 C for 1 h, and then recrystallized structures were examined, mainly as a function of initial grain size and fraction recrystallized. |
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| The Effect of Water Vapor in the Solution-Treating Atmosphere on the Aging Phenomena of Al-Cu and Al-Cu-Mg Alloys, |
DEC 1986 |
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| Authors:
M. Kanno; K. Itoi
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| Specimens of Al-4Cu and Al-4Cu-1.6Mg alloys were solution-treated at 500 C in a salt bath, or in an air furnace filled with water vapor generated at 100 C. After the solution-treatment followed by quenching, they were aged at temperatures ranging from 50 to 200 and then subjected to electrical resistivity measurements and TEM obseervations. The aging rate of the Al-Cu alloy specimens solution-treated in water vapor was higher at 150-200 ... |
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| The Effects of Zirconium Addition on Aging Phenomena of Al-Cu-Mg Alloy, |
OCT 1986 |
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| Authors:
M. Kanno; H. Suzuki; K. Itoi
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| Aging phenomena of an Al-4Cu-1.6Mg alloy with 0.17Zr were studied in comparison with those of Al-4Cu-1.6Mg alloys with and without 0.60Mn. Homogenized specimens were worked, solution-treated, quenched and naturally or artificially aged at 200 C. Interrupted quenching followed by artificial aging was also adopted. Dislocation loop structures of the ternary alloy is slightly modified by zirconium addition both in natural and artificial aging, this being in contrast to the case ... |
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| Different Effects Between Zr and Cr Additions on Recrystallization of Hot-Rolled Al-Zn-Mg-Cu Alloys, |
JAN 1986 |
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| Authors:
H. Suzuki; M. Kanno; H. Saitoh
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| Two sorts of Al-5.6Zn-2.4Mg-1.3Cu alloys with 0.12Zr and 0.26Cr, respectively, were hot-rolled by 86% at 400 C and then solution-treated at 470 C. Transmission electron microstructures of both alloys in hot-rolled state are nearly the same. Subgrain structures of both alloys developed after disappearance of the eta-particles are quite different. Zr-containing alloy shows an almost perfect subgrain structure, reflecting that the particle size of Al(sub 3)Zr is much smaller than ... |
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| The Effect of Zr or Cr Addition on the Recrystallization Behavior of Al- Zn-Mg-Cu Alloys |
NOV 84 |
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| Authors:
H. Suzuki; M. Kanno; H. Saitoh
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| Recrystallized structures of 7xxx series aluminum alloys were examined paying attention to the difference of the effects between Zr and Cr additions. The Al-5.7%Zn-2.5%Mg-1.5%Cu alloys with 0.1%Zr to 0.2%Cr were mainly used as specimens. They were hot-rolled, solution-treated, cold-rolled and then subjected to recrystallization-heat-treatment (RHT) at temperatures ranging from 673 to 798 K. Growth rate of sub-grains at an early stage of RHT is greater in Zr-bearing alloy than in ... |
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| High Temperature Oxidation of Vanadium-Aluminum Alloys by Low Pressure Oxygen |
FEB 84 |
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| Authors:
T. Yoneoka; M. Yamawaki; M. Kanno
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| Oxidation behavior of vanadium-aluminum alloys containing 5 and 10 at% aluminum has been investigated at temperatures ranging from 800 to 933 K in oxygen pressures of 1.33 and 133 Pa by means of a thermo-electrobalance, an X- ray diffractometer, an electron probe microanalyzer, a microhardness tester as well as metallographic techniques. Whereas mass gain due to oxidation initially followed the parabolic rate law, it then turned into linear kinetics, resulting ... |
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| Nonuniform Distribution of Eta Phase in Recrystallized Regions in an Al- Zn-Mg-Cu Alloy Containing Zirconium |
DEC 83 |
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| Authors:
H. Suzuki; M. Kanno; H. Saitoh
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| The reason why the region free from eta phase appeared in recrystallized regions was studied for an Al-6.0%Zn-2.3%Mg-1.2%Cu-0.18%Zr alloy subjected to slow cooling after solution-treatment. The cast alloy was homogenized, cold-rolled, solution-treated at 470 C and then step-quenched. It was found that the region free from eta phase corresponded well to the region free from Al(sub 3)Zr precipitate. It was also found that Al(sub 3)Zr precipitate did not form, during ... |
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| Recrystallized Grain Size of 7075 Alloy Thermo-mechanically Treated |
NOV 83 |
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| Authors:
H. Suzuki; M. Kanno; H. Saitoh
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| The hot-rolled 7075 alloy specimen was solution-treated at 470 C, quenched, overaged at temperatures ranging from 200 to 400 C, cold-rolled and finally solution-treated at 470 C for different times. Recrystallized grain structures were examined by using optical, scanning and transmission electron microscopes. It was confirmed that overaging at 400 C was most effective for getting fine recrystallized grains. This is due to the fact that course eta precipitates larger ... |
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| The Influence of Working on Quench Sensitivity of Al-Zn-Mg-Cu Alloy Containing Transition Elements |
JUL 83 |
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| Authors:
H. Suzuki; M. Kanno; H. Saitoh
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| The quench sensitivity of Al-Zn-Mg-Cu alloy containing 0.2%Cr, 0.2%Zr and 0.2-0.4%Hf was studied by means of hardness, electrical resistivity and electron microscopy. Specimens were cold- or hot-rolled before solution- treatment. Only in the alloy containing Zr or Hf was quench sensitivity affected by working and it became higher with increasing reduction. The influence was moderate in hot-working compared with that in cold-working. The highest quench sensitivity was always observed in ... |
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| High Temperature Oxidation of Vanadium-Chromium Alloys by Low Pressure Oxygen |
MAY 83 |
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| Authors:
M. Yamawaki; T. Yoneoka; M. Kanno
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| Oxidation behavior of vanadium-chromium alloys containing 5 and 10 at% chromium has been investigated at temperatures ranging from 800 to 993 K and at oxygen pressures of 1.33 and 133 Pa by means of a thermo-electrobalance, an X-ray diffractometer, an electron probe microanalyzer, a micro-hardness tester as well as metallographic techniques. Whereas mass gain due to oxidation initially followed the parabolic rate law, it then turned into very slow linear ... |
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| Tear Test on 7075 and 7475 Alloys by Use of Kahn Type Specimens |
MAY 83 |
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| Authors:
H. Suzuki; M. Kanno; H. Saitoh
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| The toughness of 7075 and 7475 alloys was examined by tear tests using modified Kahn type specimens of 3 mm in thickness. Alloy specimens were solution-treated at 470 C or 495 C, quenched, and were subjected to two-step aging (T73 treatment). Average values of UPE (energy necessary for crack propagation per unit area) are always higher in 7475 than in 7075, when heat- treated in the same way. Fine grained ... |
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| Effects of Zirconium Addition on Quench-Sensitivity of Al-Mg-Cu Alloys |
JAN 83 |
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| Authors:
H. Suzuki; M. Kanno; H. Saitoh; K. Itoi
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| Type 7050 Al-Zn-Mg-Cu alloys containing 0 to 0.16%Zr were heat treated in different ways. The hardness and electrical resistivity measurements and transmission electron microscopy were employed. The nose temperature of time-temperature-precipitation curves determined by resistivity measurements is about 350 C independently of Zr contents. However, the precipitation in Zr containing alloys is markedly enhanced. The quench-sensitivity of Zr containing alloys is proved to be governed by heterogeneous precipitation of eta ... |
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| Precipitation of T(sub 1) Phase in (Alpha + T(sub 1)) Type Al-4.2%Cu-1. 3%Li Alloy |
NOV 82 |
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| Authors:
H. Suzuki; M. Kanno; N. Hayashi
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| The precipitation of T(sub 1)(Al(sub 2)CuLi) phase was investigated with special attention to the nucleation site for an Al-4.2%Cu-1.3%Li alloy by means of transmission electron microscopy. The T(sub 1) phase is nucleated at fine secondary defects which have formed densely in an early stage of aging, resulting in the uniform distribution of T(sub 1) when specimens are water- quenched and aged. The distribution becomes extremely sparse when such specimens as ... |
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| Aging Phenomena of Al-Li-Mg Alloy Affected by Additional Elements |
JUL 82 |
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| Authors:
N. Hayashi; M. Kanno; H. Suzuki
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| Aging behavior and structure of Al-1.6Li5.7Mg (weight %) alloys containing a small amount of Ag, Cu, or Zn were studied by means of hardness measurement and transmission electron microscopy, etc. These additional elements improve the age-hardenability of the ternary alloy. This effect is remarkable in the alloys containing 0.1Ag or 0.6Zn (atomic %). The fact is considered to be partly due to the finer distribution of delta prime phase and ... |
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| Precipitation of Intermediate and Equilibrium Phases in (Alpha + Eta)- Type Al-Zn-Mg Alloy |
MAR 82 |
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| Authors:
H. Suzuki; M. Kanno; G. Itoh; H. Saitoh
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| Precipitate structures of an (alpha + eta)-type Al-5.90%Zn-1.03%Mg alloy subjected to different heat-treatments were examined by means of transmission electron microscopy. The heat-treatment conditions for formation of eta prime, X and eta phases were described. The eta phase is uniformly formed through X phase as well as through eta prime phase. The eta prime, X and eta phases are always formed through heterogeneous nucleation. |
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| Effect of Cadmium Addition on Aging Phenomena of Al-4%Cu-1%Li Alloy |
FEB 82 |
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| Authors:
H. Suzuki; M. Kanno; N. Hayashi
|
| Aging behavior of Al-4Cu-1Li ternary and Al-4Cu-1Li-0.1Cd quaternary alloys was investigated by means of hardness measurements and transmission electron microscopy. Specimens were normally aged (after water-quenching) or directly aged at 200 to 250 C for various times. The cadmium-rich precipitates in two phases are described. |
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| Theta Prime Structure in Relation to Nucleation Sites for Theta Prime Phase in Al-Cu Alloys |
JAN 82 |
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| Authors:
H. Suzuki; M. Kanno; O. Kanoh
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| Transmission electron microscopy was carried out on the Al-4Cu alloy solution-treated at 793 K for 7.2 ks, quenched into iced water or directly quenched to an aging bath and subsequently aged for different times. Homogeneous precipitation of a theta prime phase never occurs in any case. The theta prime structure actually observed is controlled by the theta prime precipitates formed on dislocation loops, dislocation lines and/or theta double prime. The ... |
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| Effects of Manganese Addition on Aging Behavior of Al-4%Cu Alloy |
DEC 80 |
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| Authors:
M. Kanno; H. Suzuki; O. Kanoh
|
| Aging phenomena of Al-4%Cu alloys containing Mn up to 0.5% were studied. Two types of solution treatments, normal treatment at 520 C for 2 hr and special treatment at 520 C for 1 hr after annealing at 560 C for a week, were made. Specimens were aged mainly at 200 C. The initial aging rate and age- hardenability of the ternary alloys normally treated reduce with increasing Mn content. This ... |
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| A Consideration on Two-Step Aging in Al-Mg-Si Alloy |
NOV 80 |
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| Authors:
H. Suzuki; M. Kanno; G. Itoh
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| Two-step aging phenomena in an Al-1.17%Mg(sub 2)Si alloy pre-aged at 20 approximately 100 C and finally aged at 175 C were studied by means of hardness and electrical resistivity measurements and transmission electron microscopy. The positive effect of two-step aging is visualized only for pre- aging at 100 C, and in this case, hardness drop or coarsening of G.P. zones is never found under the condition of short time-pre-aging. The ... |
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| The Precipitation of Theta Prime Phase in an Al-4%Cu-0.06%In Alloy |
OCT 80 |
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| Authors:
M. Kanno; H. Suzuki; O. Kanoh
|
| The theta prime precipitation was studied in an Al-4%Cu-0.060%In alloy aged at 473 K by transmission electron microscopy, EDXS analysis, etc., to clarify the phenomenon of aging acceleration widely known in this alloy. The aging structures of Al-4%Cu-0.65%Sn and Al-4%Cu-0.096%Cd alloys as well as Al- 4%Cu alloy were also studied. It was found that indium rich precipitates formed finely at an early stage of aging, resulting in the heterogeneous nucleation ... |
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| Aging Structures at the Stage of Slow Reaction in Al-4%Cu and Al-4%Cu-0. 062%Sn Alloys |
APR 80 |
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| Authors:
H. Suzuki; M. Kanno; G. Itoh
|
| Secondary defects and G.P. zone structures of Al-4Cu binary and Al- 4Cu-0.062Sn ternary alloys were investigated during their slow reaction stage by means of high resolution transmission electron microscopy. The alloys were solution-treated at 560 C, quenched and aged at 50 C for the time up to 7 days. Dislocation loops are coarsely distributed in the binary alloy during the period of slow reaction in contrast with the theory by ... |
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| The Dislocation Loop Structure in Relation to Sn-Rich Phases in an Al- 4%Cu-0.065%Sn Alloy |
MAR 80 |
|
| Authors:
M. Kanno; H. Suzuki; O. Kanoh
|
| Transmission electron microscopic studies of the alloy which was solution treated at temperatures above 520 C and aged at 200 C, were mainly made to clarify the cause of development of fine dislocation loop structure with increasing amount of additional Sn. Dislocation loops generally originate at an early stage of aging from Sn-rich precipitates. Some quenched-in vacancies are initially included in Sn-rich precipitates and concurrently those in matrix rapidly diffused ... |
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| Aging Phenomena of Dilute Al-Cu and Al-Cu-Sn Alloys |
JAN 80 |
|
| Authors:
H. Suzuki; M. Kanno; G. Itoh
|
| The aging phenomena of Al-1 and 2% Cu alloys containing Sn up to 0. 136% at aging temperatures from 0 to 100 C were studied by means of electric resistivity measurements and high-resolution transmission electron microscopy. The aging rate of ternary Al-2%Cu-Sn alloys is retarded compared with that of Al-Cu binary alloy at aging temperatures 0 to 75 C. The ternary Al-1%Cu-Sn alloy has the faster aging rate at 50 ... |
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| Effects of Copper Addition on Aging Phenomena in Al-Mg-Si Alloys |
DEC 79 |
|
| Authors:
H. Suzuki; M. Kanno; Y. Shiraishi; K. Hanawa
|
| the aging phenomena of al-1.2%mg(sub 2)si alloys containing cu up to 0.75% were studied by means of hardness, calorimetric and electric resistivity measurements, and transmission electron microscopy. the initial rate of aging at 175 c and the maximum hardness increase. lowering of the strength due to ''stored aging'' is relieved as the additional amount of cu is increased, because q' phases of a quarternary compound also precipitate in the alloys ... |
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| ENERGY DISPERSIVE X-RAY SPECTROSCOPY ON SO-CALLED Sn-RICH PRECIPITATES IN Al-Cu ALLOY CONTAINING A SMALL AMOUNT OF Sn |
JUN 79 |
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| Authors:
M. Kanno; H. Suzuki; O. Kanoh
|
| The authors reported that theta prime phases heterogeneously precipitate on small black spots formed in the early stage of high temperature aging of a ternary Al-Cu-Sn alloy resulting in the aging acceleration. The present work was undertaken to make clear whether the black spots are really Sn- rich phases or not by means of an energy dispersive X-ray spectroscope mounted on a transmission electron microscope. The black spots are proved ... |
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| EFFECTS OF EXCESS MAGNESIUM OR SILICON ON THE TWO-STEP AGING BEHAVIOR OF Al-Mg(sub 2)Si ALLOYS |
MAY 79 |
|
| Authors:
H. Suzuki; M. Kanno; Y. Shiraishi
|
| al-0.7 and 1.2%mg(sub 2)si alloys (balanced alloys) and those containing excess mg or si (excess alloys) were investigated by means of hardness, electrical resistivity and specific heat measurements and high- resolution transmission electron microscopy. the alloys were completely solution-treated at 560 c, quenched, preaged at 20 approximately 100 c, and finally aged at 175 c. if preaged at low temperatures, the maximum hardness of the alloys two-step aged is generally ... |
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| AGING PHENOMENA AT THE STAGE OF PLATEAU IN THE AGING CURVES OF Al-4%Cu AND Al-4%Cu-0.065%Sn ALLOYS |
APR 79 |
|
| Authors:
H. Suzuki; M. Kanno; G. Itoh
|
| isothermal aging curves on the logarithmic scale of many aluminum- base alloys have the plateau of flat region. physical meaning of the plateau is still ambiguous. the work on this subject was undertaken for electrical resistivity change vs. log t (t: aging time) curves in al-4cu and al-4cu-0. 065sn alloys from the viewpoint whether the precipitation is exactly checked at the plateau. the precipitation is not checked at the stage. ... |
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| EFFECTS OF QUENCHING-BATH TEMPERATURES MAINLY ON QUENCHED STRUCTURES OF Al-4%Cu AND Al-4%Cu-0.065%Sn ALLOYS |
DEC 78 |
|
| Authors:
H. Suzuki; M. Kanno; K. Itoi
|
| The Al-4Cu binary and Al-4Cu-0.065Sn ternary alloys were solution- treated, step-quenched into a bath kept at -30 to 100C for 1-120 minutes and then quenched into liquid nitrogen. The specific electric resistivity of both alloys showed a maximum at the step quenching temperature of about 50C when the step quenching time is longer than 10 seconds. The results of high resolution electron electron micrographs showed, in the quenching state, that ... |
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| THE AGE-HARDENABILITY OF Al-Mg(sub 2)Si ALLOYS WITH EXCESS SILICON |
NOV 78 |
|
| Authors:
M. Kanno; H. Suzuki; Y. Shiraishi
|
| The improvement in age-hardenability due to excess silicon was investigated in Al-Mg(sub 2)Si alloys by means of hardness, electrical resistivity and specific heat measurements and high-resolution electron microscopy. The improvement is related to the increase in the amount of Al-Mg-Si ternary clusters leading to the finer and denser distribution of needle-shaped G.P. zones. If excess silicon more that 0.2% is contained, however, all of the ternary clusters do not always ... |
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| THE UNUNIFORMITY IN PRECIPITATES-DENSITY IN HIGH MAGNESIUM Al-Mg ALLOY SHEETS |
JUN 78 |
|
| Authors:
H. Suzuki; M. Kanno; T. Kitayama
|
| A phenomenon, that the density of Beta prime-precipitates is not always uniform through the section of rolled sheet, that is, the precipitates are often denser near the sheet surface, was investigated in Al-Mg alloys containing 5 to 10%Mg. The rolled sheets were solution treated at 400 to 500 C and aged at 200 C for prolonged times. The phenomenon is partly related to the internal oxidation during soaking before rolling, ... |
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| THE EFFECT OF AGED STRUCTURES ON THE FATIGUE BEHAVIOR OF Al-4% Cu ALLOY |
OCT 77 |
|
| Authors:
H. Suzuki; M. Kanno; M. Tsubota; K. Hayashi
|
| The fatigue behavior of the Al-4% Cu alloy having various aged structures was studied at room temperature. Different aged structures result in different shapes of S-N curves: the alloy containing G.P. zones (or theta double prime) is superior in the fatigue strength in the region of lower fatigue life to that containing theta prime. This relation tends to be inverse in the region of higher fatigue life. This is attributed ... |
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| EFFECTS OF Si ADDITION ON THE AGING BEHAVIORS OF AN Al-2%Cu-0.9%Mg ALLOY |
MAY 77 |
|
| Authors:
H. Suzuki; I. Araki; M. Kanno; K. Itoi
|
| the aging behaviors of al-2%cu-0.9%mg alloy have been studied paying attention to the effect of si addition up to 0.5% by means of hardness, calorimetric and electric resistivity measurements and transmission electron microscopy. specimens were solution-treated at 505 c, water-quenched and subsequently aged mainly at 200 c. the hardness of aged ternary alloy was remarkably increased by adding si, probably due to the change in aged structures that there appeared ... |
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| THE RELATION BETWEEN G.P. ZONES AND INTERMEDIATE PHASES IN ISOTHERMAL AGING OF Al-4%Cu AND Al-4%Cu-0.064%Sn ALLOYS |
DEC 76 |
|
| Authors:
H. Suzuki; M. Kanno; S. Sakano
|
| whether the g.p. zones change into intermediate phases (theta prime) was investigated by using a high resolution transmission electron microscope. specimens were solution-treated at 520 c, quenched and subsequently aged at temperatures from 150 to 175 c for the time up to 10(super 4) min. either g.p. (2) zones in the binary alloy or g.p.(x(sub 2)) zones in the ternary alloy corresponding to the above g.p.(2) zones were considered to ... |
|
| HARDNESS OF AN Al-4%Cu-1.6%Mg ALLOY AFFECTED BY HEAT-TREATMENT CONDITIONS |
DEC 76 |
|
| Authors:
H. Suzuki; M. Kanno; I. Araki
|
| effects of such heat-treatment conditions as quenching into iced water (w.q.), quenching into oil bath held at 200 c (d.q.), and pre-aging at 100 degrees and 140 c for specified time after these quenching treatment on the hardness of the alloy were investigated in relation to aged structures by means of transmission electron microscopy. the alloy aged at 200 c had the hardness remarkably increased under the condition of d.q. ... |
|
| AGING PHENOMENA OF Al-3.8%Cu-Be ALLOYS |
OCT 76 |
|
| Authors:
H. Suzuki; M. Kanno; K. Itoi; M. Fuzii
|
| the aging phenomena of al-3.8>cu-be alloys having up to 0.093>be and al-3.8>cu-0.09>be-0.05> cd alloy were investigated mainly as a function of aging temperature and be content by means of electrical resistivity and hardness measurements, and transmission electron microscopy. specimens were solution- treated at 520 c for 2 hr, quenched and subsequently aged at temperatures ranging from 0 to 200 c. (1) the aging retardation or acceleration at low or high ... |
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| STRUCTURAL CHANGES OF G.P. ZONE DUE TO REVERSION HEAT-TREATMENT IN Al- 4%Cu AND Al-4%Cu-0.065%Sn ALLOYS |
OCT 76 |
|
| Authors:
M. Kanno; H. Suzuki; T. Kitayama
|
| high resolution transmission electron microscopy was made on the alloys which were preaged under the conditions, 100 cx1000 min and 130 cx4000 min, in order to develop g.p.(1) and g.p.(1) plus g.p.(2) structures (so far as the binary alloy was concerned) respectively, and reversion heat-treated at 200 c and 250 c for various times. g.p. zones in the binary alloy reversion heat- treated at 200 c were apt to disappear, ... |
|
| PRECIPITATION OF THETA PRIME PHASE ADJACENT TO GRAIN BOUNDARY |
SEP 76 |
|
| Authors:
H. Suzuki; M. Kanno; I. Araki
|
| the region (d (theta prime) region) where finer theta prime precipitates were densely formed was found adjacent to the grain boundary in al- (2 to 4)wt% cu-sn alloys, when solution-treated, quenched and aged at 200 to 250 c. in this report, the formation of the d (theta prime) region in al-cu-sn alloys was studied in relation to quenching conditions and solution-treatment temperatures (t(sub s)) by using a transmission electron microscope. ... |
|
| PRECIPITATION BEHAVIOR OF THE INTERMEDIATE PHASE IN Al-4%Cu-Cd ALLOYS |
AUG 76 |
|
| Authors:
H. Suzuki; M. Kanno; M. Fujii
|
| in al-cu-cd alloys, cd as an additional element would affect the secondary defect structure of al-cu binary alloys, and on the other hand, the cd rich phase formed at the relatively early stage of aging. therefore, the study on the precipitation behavior of the intermediate phase (theta prime) was carried out in al-4 wt% cu-cd alloy system with various cd contents up to 0.114 wt%, in relation to the defect ... |
|
| THE G.P. ZONE STRUCTURE IN AL-4WT%CU-SN ALLOYS |
MAY 76 |
|
| Authors:
H. Suzuki; M. Kanno; S. Sakano
|
|
| THE AGING CURVES OF Al-4wt%Cu-Cd ALLOYS |
FEB 76 |
|
| Authors:
M. Kanno; M. Fujii; H. Suzuki; S. Sakano
|
| Following the previous report on the aging curves of Al-4wt%Cu-Sn alloys, those of Al-4w%Cu-Cd alloys with Cd content up to 0.064%, were investigated in relation to aging temperatures aging times and Cd contents by electrical resistivity measurement. The specimens were solution-treated at 520 C for 2 hr, quenched and subsequently aged mainly at temperatures ranging from 0 to 200 C. |
|
| AGING CURVES OF Al-4wt%Cu-Sn ALLOYS |
DEC 75 |
|
| Authors:
M. Kanno; S. Sakano; H. Suzuki
|
| the al-4wt%cu-sn alloys with up to 0.064wt% sn were solution-treated at 520 c, quenched and subsequently aged at temperatures ranging from 0 to 200 c. then, the aging curves of those specimens were studied in relation to aging temperatures, aging times and sn contents, by resistivity measurements and transmission electron microscopy. |
|
| RELATION BETWEEN SECONDARY DEFECT STRUCTURE AND PRECIPITATION OF INTERMEDIATE PHASES IN Al-4%Cu-Mg ALLOYS |
DEC 75 |
|
| Authors:
H. Suzuki; M. Kanno; I. Araki; K. Itoi
|
| the al-4%cu-mg alloy specimens with 0 to 1.6% mg were solution- treated at 505 c, quenched and subsequently aged at 100 to 200 c. direct quenching from 505 c to the aging temperature was also employed. the secondary defect structures in these specimens, and their influences on the precipitation of intermediate phases (particularly of s') were studied in relation to mg contents, and aging or quenching conditions by means of ... |
|
| OXIDATION OF HEAT-RESISTANT FE-BASE ALLOY INCOLOY 800 |
NOV 75 |
|
| Authors:
M. Yamawaki; M. Mito; M. Kanno
|
|
| PRECIPITATION OF THE INTERMEDIATE PHASE IN Al-Cu-Sn ALLOYS |
NOV 75 |
|
| Authors:
H. Suzuki; M. Kanno; I. Araki
|
| The precipitation phenomena of the intermediate phase (theta prime phase) in Al-4wt%Cu-Sn alloys containing 0 to approximately 0.066wt% Sn were examined at 200 and 250 C, to make clear the influence of the secondary defect structure (dislocation loop structure) which varied with Sn contents of the alloys. |
|
| THE REVERSION OF QUENCH-CLUSTER IN Al-4wt%Cu-Sn ALLOYS |
NOV 75 |
|
| Authors:
H. Suzuki; M. Kanno; I. Araki; S. Sakano
|
| The Al-4wt%Cu alloys containing various amounts of Sn up to 0.101wt% were solution-treated at 520 C, quenched into iced water, kept in liquid nitrogen, and subsequently reverted at 200 C for 0.5 approximately 30 min. The changes in electrical resistivity due to reversion were studied in detail in relation to the reverted structure by using a high resolution electron microscope. |
|
| EFFECTS OF MG CONTENT ON AGING PHENOMENA IN AL-CU-MG ALLOYS |
APR 75 |
|
| Authors:
H. Suzuki; M. Kanno; I. Araki
|
|
| STUDIES ON AGING RETARDATION IN AL-CU-CD ALLOYS |
OCT 72 |
|
| Authors:
H. Suzuki; M. Kanno; K. Fukunaga
|
|
Reports by Author
