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Effect of chromium addition on microstructure and creep strength of as-cast Ti–48Al alloy

✍ Scribed by E. Hamzah; M. Kanniah; M. Harun

Publisher
Elsevier Science
Year
2008
Tongue
English
Weight
961 KB
Volume
483-484
Category
Article
ISSN
0921-5093

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✦ Synopsis

The microstructure and creep behaviour of as-cast gamma titanium aluminide based alloys with nominal composition of Ti-48Al, Ti-48Al-2Cr and Ti-48Al-4Cr (at.%) were investigated. Constant load tensile creep tests were performed at temperature and stress of 800 • C and 150 MPa, respectively. Creep characteristics such as steady-state creep rate, time to 1% creep deformation, creep deformed microstructures and creep fracture was analysed. The effect of Cr addition on creep strength were analysed with respect to solid solution strengthening by Cr in ␥ phase, formation of ␤ phase and comparison with the base binary Ti-48Al alloy.

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