卢凯凯,周立鹏,李敏娜,马保飞,肖松涛

• 1:西北有色金属研究院

摘要(Abstract)：

采用光学显微镜,扫描电镜和电子拉伸机等研究了TA15合金经两阶段强韧化退火热处理后的显微组织和性能。结果表明:采取两阶段的热处理工艺后,TA15合金的组织由约20%的初生等轴α,55%的片状α和β转变基体的组织组成;合金具有良好的塑性及较好的室温和高温强度,在975℃×1 h,WQ+850℃×2 h,AC的制度下,TA15合金的室温抗拉强度为1005 MPa,屈服强度为914 MPa,伸长率、冲击韧性分别为13%和72.2 J/cm~2。合金的冲击韧性I与次生片层α厚度t具有较好的线性关系I=26.504t+44.915,冲击断口形貌可以观察到大量的韧窝,表明合金的断裂机制以韧性断裂为主。随着第二重退火温度的升高,次生片层α厚度增加,韧窝逐渐变大,韧性增加。

关键词(KeyWords)： TA15钛合金;力学性能;热处理;冲击韧性

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 卢凯凯,周立鹏,李敏娜,马保飞,肖松涛

DOI: 10.13289/j.issn.1009-6264.2019-0257

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