METHOD FOR IMPROVING MECHANICAL PROPERTIES OF BETA-TREATED TITANIUM ALLOY ARTICLE

摘要

PROBLEM TO BE SOLVED: To provide a method for improving mechanical properties of a beta-treated, alpha-beta titanium alloy article.;SOLUTION: The improving method includes: forging the alloy article at the beta transformation temperature or higher to produce a post final forged article; subjecting the post final forged article to a post-forged cooling process to produce a post-forged cooled article; solution-heat-treating the post-forged cooled article at a temperature lower than the beta transformation temperature to produce a solution-heat-treated article; subjecting the solution-heat-treated article to a controlled post-solution cooling process to produce a post-solution cooled article; and alpha-phase-precipitation-treating the post-solution cooled article to obtain a final article having an average elongation value of at least about 3%.;COPYRIGHT: (C)2009,JPO&INPIT