BETA Ti ALLOY WITH HIGH STRENGTH AND LOW YOUNG'S MODULUS, AND ITS MANUFACTURING METHOD

摘要

PROBLEM TO BE SOLVED: To produce a beta Ti alloy in which the problem of increase in Young' s modulus attendant on the increase of strength by aging can be solved and the increase of strength can be attained while maintaining Young's modulus, and also to provide a useful method for manufacturing such beta Ti alloy. ;SOLUTION: In successively applying hot working, solution heat treatment and cold working to manufacture the beta Ti alloy used in an as-cold-worked state, at least solution heat treatment temperature is regulated so that it is between a value below the β-transformation point and 600°C and also cold working is carried out at ≥30% draft. By this method, the beta Ti alloy having ≤105 GPa Young's modulus can be manufactured.;COPYRIGHT: (C)2003,JPO