β21S钛合金的组织和性能研究

The Research on Microstructure and MechanicalProperties of β21S Titanium Alloy

β２１Ｓ是一种亚稳定β型钛合金，最初是针对美国国家航空航天飞机用金属基复合材料的可轧制带材的抗氧化基体合金而研制的。然而，该合金具有极好的综合性能，航空、航天工业部门正在考虑广泛应用该合金。本文测定了β２１Ｓ的相变点，进行了超声检验，初步研究了棒材不同热处理状态下的力学性能及显微组织。结果表明，β２１Ｓ合金具有优异的力学性能，其显微组织类似于其它贫β的亚稳定β钛合金的显微组织。

β21S is a metastable beta titanium alloy It was originally developed as a strip producible, oxidation resistant matrix material for the metal matrix composites of the American National Aerospace Plane (NASP) Its unique set of properties, however, have led to its being considered for a variety of aerospace industrial applications In this article, the transformation temperature of β21S has been determined, ultrasonic inspection has been done, mechanical properties and microstructure of β21S alloy bars on various heat treatment conditions have been studied Results show that β21S has excellent mechanical properties and its microstructure is similar to those of other metastable β Titanium alloys with poor β