No abstract

INTRODUCTIONTi-Al-Mn (OT4-1) alloy is currently being used for aero engine components as well as other aerospace applications by forming through a conventional route which is typically cost, labor and equipment intensive. Titanium alloys such as Ti-6A1-4V is expensive because of the alloying additions like Vanadium are extremely expensive, still this alloy is widely used in aerospace applications by manufacturing the components through superplastic route. The alloy Ti-Al-Mn (made as per the Russian specification, OT4-1) could be a candidate material for replacing the costly Ti-6A1-4V alloys. In d In σ E,d,T d In έ E,d,T (1) Key words: Superplastic behavior, Ti-Al-Mn alloy, elongation to failure, strain rate. at a constant value of strain (ε), grain size (d) and temperature (T), where σ, έ, and m are the true stress, the true strain rate and the strain rate sensitivity index 81 Brought to you by | Kungliga Tekniska Högskolan Authenticated Download Date | 7/6/15 3:15 AM

ABSTRACT