METASTABLE BETA-TITANIUM ALLOYS AND METHODS OF PROCESSING THE SAME BY DIRECT AGING

摘要

Metastable beta titanium alloys and methods of processing metastable β-titanium alloys are disclosed. For example, certain non-limiting embodiments relate to metastable β-titanium alloys, such as binary β-titanium alloys comprising greater than 10 weight percent molybdenum, having tensile strengths of at least 150 ksi and elongations of at least 12 percent. Other non-limiting embodiments relate to methods of processing metastable β-titanium alloys, and more specifically, methods of processing binary β-titanium alloys comprising greater than 10 weight percent molybdenum, wherein the method comprises hot working and aging the metastable β-titanium alloy at a temperature below the β-transus temperature of the metastable β-titanium alloy for a time sufficient to form α-phase precipitates in the metastable β-titanium alloy. The metastable β-titanium alloys are not solution heat treated after hot working and prior to aging. Articles of manufacture comprising binary β-titanium alloys according to various non-limiting embodiments disclosed herein are also disclosed.

主权项

1. A method of processing a binary β-titanium alloy, the method-comprising:
hot working a binary β-titanium alloy consisting essentially of titanium, greater than 10 weight percent molybdenum, and incidental impurities; and heating the binary β-titanium alloy within an aging temperature range from 850° F. to 1375° F. for a time sufficient to form α-phase precipitates within the binary β-titanium alloy; wherein the binary β-titanium alloy is not solution heat treated after hot working and prior to heating within the aging temperature range.