The compound, A13Ti, was alloyed with 7.5 at.% Fe to produce a cubic L12 structure. Ibis material was arc cast and either directly homogenization heat treated (HHT) or comminuted into powder and consolidated by hot isostatic pressing (HIP). Microstructures were carefully evaluated by optical and electron microscopy. Mechanical properties were measured as a function of temperature using compression and flexure. Utilizing a novel test fixture, both monotonic and cyclic tensile ...
Future aircraft gas turbine engines will, most likely, utilize hot- section materials based on systems other than nickel-base superalloys. The identification of new systems has been motivated by the quest for higher combustion temperatures to satisfy the need for greater thrust-to-weight ratios and higher operating efficiencies. Among the potential systems is the broad class of materials known as intermetallics. Research and development has gone into the study of based on ...
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