冀宣名

• 1:贵州大学材料与冶金学院

摘要(Abstract)：

采用光学显微镜(OM)、扫描电镜(SEM)、X射线衍射仪(XRD)和透射电镜(TEM)研究了不同状态Ti-B20钛合金在低温时效过程中的相组成及微观组织演变规律，分析了低温时效过程中ω相的形成规律。结果表明：固溶态Ti-B20合金在低温时效时，亚稳β相中优先析出两种取向的等温ω相，时效温度升高至450℃时，ω相消失；合金在冷轧变形过程中形成的位错等晶体缺陷，降低了合金相变的所需能量，促进了ω相形成，缩小了ω相存在温度区间，且变形量越大，促进效果越大。ST试样、CR10试样、CR50试样在350℃时效1 h后的相组成分别为β+ω、β+ω+α和β+α。当β、ω、α同时存在时，它们之间的取向关系为：■。

关键词(KeyWords)： Ti-B20钛合金;冷轧变形;等温ω相;相变行为

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51974097,52161010);; 贵州省科技支撑计划(2022-050);; 贵州大学培育项目(2020-21)

作者(Author): 冀宣名

DOI: 10.13289/j.issn.1009-6264.2024-0034

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