邵晖,单迪,王凯旋,张赛飞,白力静,张国君,赵永庆

• 1:西安理工大学材料科学与工程学院
• 2:西部超导材料科技股份有限公司
• 3:西北有色金属研究院

摘要(Abstract)：

采用光学显微镜、扫描电镜、X射线衍射和透射电镜等研究了Ti-55531合金经890℃固溶2 h后再经过单级时效(580℃×1～12 h)和双级时效(400℃×12 h+580℃×1～12 h)处理后α相的析出粗化行为,并探讨了α相形貌对其室温拉伸力学性能的影响。结果表明:固溶合金组织包含β相和纳米无热ω相,裂纹主要沿着β相内滑移带扩展,导致准解理面的形成,合金强度较低,为755 MPa;而单级时效合金组织由微米条状α相、晶界α相和β相组成,空洞沿着晶内长条α相形核并连接成准解理面,强度和伸长率分别为1352 MPa和5. 3%;双级时效合金由纳米条状α相、晶界α相和β相组成,脆性裂纹主要沿β晶界扩展,强度高达1648 MPa,伸长率仅为1%。

关键词(KeyWords)： 钛合金;α相;强度;伸长率

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51501150);; 陕西省教育厅自然科学专项(16JK1570)

作者(Author): 邵晖,单迪,王凯旋,张赛飞,白力静,张国君,赵永庆

DOI: 10.13289/j.issn.1009-6264.2019-0182

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