TiAl INTERMETALLIC COMPOUND BASE ALLOY, ITS PRODUCTION, TURBINE MEMBER AND ITS PRODUCTION

摘要

PROBLEM TO BE SOLVED: To provide a TiAl intermetallic compd. base alloy having oxidation resistance, high temp. strength, toughness and ductility capable of sufficiently corresponding to practical use. ;SOLUTION: This alloy has a compsn. by weight, 44.5 to 48.5% Al, 5 to 9.5% Nb, 0.5 to 2% Cr, 0.1 to 0.4% Si, 0.1 to 0.4% Ni, and the balance Ti with inevitable impurities and a two phase structure of a lamellar structure composed of a γ-TiAl phase and an α2-Ti3Al phase and a γ phase or a three phase structure of a lamellar structure, a γ-TiAl phase and a β phase.;COPYRIGHT: (C)2000,JPO