邢浩洲,刘乐梁,刘继雄,王小翔,孙巧艳

• 1:西安交通大学
• 2:金属材料强度国家重点实验室
• 3:宝鸡钛业股份有限公司

摘要(Abstract)：

研究了在β相区(830℃)短时间固溶及时效处理对Ti-Al-Mo-V-Cr-Nb钛合金显微组织和室温拉伸性能的影响。结果表明:经过短时固溶和525℃时效4 h,随着固溶时间从2 min延长到15 min,合金中微米尺度等轴初生α相(α_p相)的数量减少,面积分数从3.8%下降到0.18%,β晶粒平均直径从6.7μm增加到11.9μm,抗拉强度从1456 MPa增加到1491 MPa,屈服强度从1390 MPa增加到1424 MPa,断后伸长率从8.5%下降到4.2%,塑性显著降低;随着短时固溶时间的延长,合金在拉伸过程中裂纹萌生位置由α_p相边界处萌生转向晶界处萌生,断口由韧窝型断口转为准解理断口。

关键词(KeyWords)： 亚稳β钛合金;短时固溶处理;微观组织;拉伸性能;裂纹萌生

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 邢浩洲,刘乐梁,刘继雄,王小翔,孙巧艳

DOI: 10.13289/j.issn.1009-6264.2024-0370

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