NANOCRYSTAL TITANIUM ALLOY AND PRODUCTION METHOD FOR SAME

摘要

A titanium alloy has high strength and superior workability and is preferably used for various structural materials for automobiles, etc. The titanium alloy is obtained by the following production method. An alloy having a structure of ±' martensite phase is hot worked at conditions at which dynamic recrystallization occurs. The working is performed at a heating rate of 50 to 800 °C/second at a strain rate of 0.01 to 10/second when the temperature is 700 to 800 °C or at a strain rate of 0.1 to 10/second when the temperature is more than 800 °C and less than 1000 °C so as to provide a strain of not less than 0.5. Thus, equiaxed crystals with an average grain size of less than 1000 nm are obtained.