| Electrochemical Mini-Probes for Corrosion-Fatigue Mechanism Studies. |
SEP 1971 |
|
| Authors:
J. Carrol; DAVID W TAYLOR NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER BETHESDA MD
|
 | Equipment development for the investigation of corrosion-fatigue mechanisms is described. Mini-probe arrays have been constructed to mount alongside and close to a fatigue-loaded specimen facing the advancing crack path. The purpose of a mini-electrode array is to measure electrochemical parameters (pH and potential) associated with an advancing fatigue crack. Equipment to apply fatigue loading to rectangular metal specimens has also been constructed. Further development work is required in order to ... |
|
| FRACTURE TOUGHNESS, FATIGUE AND CORROSION CHARACTERISTICS OF HIGH STRENGTH ALUMINUM EXTRUSIONS AND PLATE. |
27 MAR 1968 |
|
| Authors:
P. E. Schilling; B. W. Lifka; G. E. Nordmark; J. G. Kaufman; ALUMINUM CO OF AMERICA ALCOA CENTER PA ALCOA LABS
|
| The X7080 11/16x16-in. extruded panels and 3-1/2x7-1/2-in. extruded bars have been aged to the T7E42 temper, so that all test samples are now qualified. The chemical compositions and tensile properties of all test samples have been determined and are reported. The results of the accelerated exfoliation tests of the 1/2-in. and 1-3/8-in. X7080-T7E41 and 7178-T651 plate samples are reported, along with some stress-corrosion test results for these samples. Axial-stress fatigue ... |
|
| FRACTURE TOUGHNESS, FATIGUE AND CORROSION CHARACTERISTICS OF HIGH STRENGTH ALUMINUM EXTRUSIONS AND PLATE. |
1968 |
|
| Authors:
P. E. Schilling; B. W. Lifka; G. E. Nordmark; J. G. Kaufman; ALUMINUM CO OF AMERICA ALCOA CENTER PA ALCOA LABS
|
| The fracture toughness tests of all materials have been completed, and test results are reported. Axial-stress fatigue curves have been prepared for the 1/2 and 1-3/8-in. X7080-T7E41 plate, the 1/2-in. 7178-T651 plate, and the 11/16x16-in. 7075-T6510, 7075-T73510, X7080-T7E42 and 7178-T6510 extruded panels. The results of some stress-corrosion tests of the plates and extruded shapes are reported. The X7080-T7-type samples exhibit a higher resistance to stress-corrosion cracking than the 7178-T6-type samples. ... |
|
| REVIEW OF RECENT DEVELOPMENTS. CORROSION AND COMPATIBILITY, |
11 OCT 1967 |
|
| Authors:
W. E. Berry; BATTELLE MEMORIAL INST COLUMBUS OH DEFENSE METALS INFORMATION CENTER
|
|
| RESEARCH IN THERMAL NONDESTRUCTIVE EVALUATION OF CORROSION IN AIRCRAFT STRUCTURES. |
08 SEP 1967 |
|
| Authors:
W. R. Apple; E. J. Barton; H. R. Salisbury; AUTOMATION INDUSTRIES INC BOULDER CO RESEARCH DIV
|
| Existing thermal nondestructive testing equipment and techniques were used to detect corrosion defects in test samples supplied by the U. S. Navy. The system operation used is basically a controlled heating and temperature measurement over one surface of a test sample. Heat flow from the surface into the sample material is examined through surface temperature measurement using an infrared detection system. Information from the infrared detector is fed to a ... |
|
| REVIEW OF RECENT DEVELOPMENTS. CORROSION AND COMPATIBILITY, |
07 JUL 1967 |
|
| Authors:
W. E. Berry; W. K. Boyd; BATTELLE MEMORIAL INST COLUMBUS OH DEFENSE METALS INFORMATION CENTER
|
|
| FRACTURE TOUGHNESS, FATIGUE AND CORROSION CHARACTERISTICS OF HIGH STRENGTH ALUMINUM EXTRUSIONS AND PLATE. |
1967 |
|
| Authors:
P. E. Schilling; J. G. Kaufman; ALUMINUM CO OF AMERICA ALCOA CENTER PA ALCOA LABS
|
| The compositions and tensile properties of the 11/16-in. and 3-1/2-in. thick 7075-T6510, 7075-T73510, and 7178-T6510 extrusions were determined, and indicate that these samples are suitable for use on the contract. The fracture toughness, fatigue, and most corrosion specimens from these samples were prepared. An aging study of the X7080-W510 and W511 extrusions were completed, and the material is being aged. Corrosion tests of the 1/2-in. and 1-3/8-in. X7080-T7E41 and 7178-T651 ... |
|
| CORROSION RATES OF SELECTED ALLOYS IN THE DEEP OCEAN. |
17 NOV 1966 |
|
| Authors:
Joseph B. Crilly; Willis S. Haynes; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
| Corrosion rate data are given for several sets of metals and alloys exposed to the deep ocean environment off the coast of southern California at a depth of 5300 feet for 1064 days. The sets include some aluminum alloys; stainless steels; brasses and bronzes; titanium alloys; alloys containing nickel, chromium and other metals; a nickel-copper alloy; as well as sets of copper, lead and wrought iron. All specimens of six ... |
|
| HYDROGEN EMBRITTLEMENT RESULTING FROM CORROSION,CATHODIC PROTECTION, AND ELECTROPLATING. |
SEP 1966 |
|
| Authors:
E. Gileadi; PENNSYLVANIA UNIV PHILADELPHIA ELECTRO-CHEMISTRY LAB
|
| A technique was developed and the apparatus built for a fast, nondestructive method for the determination of hydrogen content of large specimen. Also, a study of the basic factors which determine the solubility and the rate of diffusion of hydrogen in metals was undertaken. The approach was to change systematically the metallurgical and physical properties of iron by forming binary alloys of variable composition, and to study the resulting changes ... |
|
| CORROSION AT 4500 FOOT DEPTH IN TONGUE-OF-THE-OCEAN, |
25 MAR 1966 |
|
| Authors:
E. Fischer; S. Finger; NAVAL APPLIED SCIENCE LAB BROOKLYN NY
|
| The Navy is increasingly involved with the corrosion and deterioration of materials to be used in the exploration of and operation in the deep ocean. A significant part of the corrosion and deterioration can be attributed to the action of microorganisms in the environment. The Naval Applied Science Laboratory has conducted exposures of a variety of metals (and organic materials) in the Tongue-of-the-Ocean at 4500-foot depth. These exposures served a ... |
|
| GALVANIC SERIES OF METALS AS RELATED TO CORROSION. |
FEB 1966 |
|
| Authors:
Ervin C. Tinsley; ARMY WEAPONS COMMAND ROCK ISLAND ILL RESEARCH AND ENGINEERING DIV
|
| A revised electromotive series has been prepared for use by design engineers. Tables were prepared from experimental data and from available literature references. The experimental work indicated many variables were present in the half-cell potential measurement procedure. Many factors that could have caused deviations in results are discussed. This work provides information as to the location of various alloys previously not included in the electromotive series. The use of the ... |
|
| PREDICTING THE INTERGRANULAR CORROSION OF AUSTENITIC STAINLESS STEELS. |
OCT 1965 |
|
| Authors:
W. D. France Jr.; N. D. Greene; RENSSELAER POLYTECHNIC INST TROY N Y CORROSION RESEARCH LAB
|
| The precise environmental conditions necessary for the intergranular corrosion of austenitic stainless steels have been determined by potentiostatic methods. Intergranular corrosion of sensitized 18Cr - 8Ni stainless steel only occurs in limited potential regions. These results have been used to develop a new method for rapidly predicting the intergranular corrosion tendencies of various sulfuric acid environments. It is also shown that sensitized stainless steels may be used in many media ... |
|
| ENVIRONMENT-SENSITIVE MECHANICAL BEHAVIOR STATUS AND PROBLEMS. |
JUN 1965 |
|
| Authors:
A. R. C. Westwood; MARTIN CO BALTIMORE MD RESEARCH INST FOR ADVANCED STUDIES
|
| During the past few years, materials scientists have expressed a renewed interest in the study of environmentsensitive mechanical behavior. This interest has resulted in the discovery of new phenomena, the development of some new concepts, the profitable application of knowledge from other areas of study to this area, and the application of recently developed experimental techniques to such 'well-established' phenomena as stress-corrosion cracking and liquid metal embrittlement. This paper describes ... |
|
| INFLUENCE OF ATMOSPHERIC CONTAMINANTS ON CORROSION - LITERATURE REPORT, |
13 JUN 1963 |
|
| Authors:
Harry C. Muffley; ROCKBESTOS WIRE AND CABLE CO NEW HAVEN CONN
|
| Corrosion preventive coatings are currently designed to prevent moisture from coming in contact with the metal surfaces. Corrosion due to moisture alone is very slow, however, the interaction of moisture and atmospheric contaminants accelerates the rate of corrosion. The fact that these two, moisture and atmospheric contaminants, vary independently, makes it difficult to predict the corrosion behavior of a given area. Literature in this field of e5deavor was reviewed with ... |
|
| AN ATTEMPT TO DETERMINE THE EFFECT OF ENVIRONMENT ON SLOW CRACK GROWTH IN HIGHSTRENGTH ALUMINUM, |
JUL 1962 |
|
| Authors:
A. M. Willner; H. H. Johnson; CORNELL UNIV ITHACA N Y DEPT OF ENGINEERING MECHANICS AND MATERIALS
|
| The tests performed indicate that if the phenomenon of slow crack growth due to stress corrosion is present in the two aluminum alloys, 7075-T6 and 2024-T3, its effect is not clearly evident in short time tests performed on specimens having the geometry and dimensions indicated in fig. 1. By using thicker specimens which would exhibit a flat fracture surface and/or running the tests for a longer period of time the ... |
|
| THE INFLUENCE OF ATMOSPHERIC CONTAMINANTS ON THE CORROSION OF STEEL, |
1942 |
|
| Authors:
J. H. Greenblatt; R. Pearlman; NAVAL RESEARCH ESTABLISHMENT DARTMOUTH (NOVA SCOTIA)
|
|
Reports by Keyword(s)
(CORROSION
