Tensile and Creep Behavior of Ordered Orthorhombic Ti2A1Nb-Based Alloys
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ABSTRACTTitanium aluminide alloys with compositions near Ti-25A1-25Nb at.% were prepared by both rapid solidification and ingot techniques. Their tensile and creep properties were studied after heat treatment to produce various microstructures containing ordered orthorhombic (O) [1], ordered beta (βo), and α2 phases. It was found that these alloys had higher specific strength from room temperature to 760°C than conventional α2 alloys. Ductility and tensile strength of O+βo alloys were strongly dependent upon heat treatment, with the highest strength observed as-heat-treated, and the highest ductility after long term aging. The creep resistance of single phase O and two phase O+βo alloys was strongly dependent upon heat treatment.
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1982 ◽
Vol 104
(3)
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pp. 234-240
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2007 ◽
Vol 539-543
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pp. 1469-1474
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2010 ◽
Vol 654-656
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pp. 500-503
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1997 ◽
Vol 28
(9)
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pp. 1745-1753
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