冷轧预变形诱发{332}孪晶对Ti-Mo合金力学性能的影响

来源 :第十六届全国钛及钛合金学术交流会 | 被引量 : 0次 | 上传用户：luo2kai3

【摘要】

：

基于βTi-Mo合金以{332}孪生方式变形时屈服强度低和均匀延伸率高,而析出脆性ω相以位错滑移变形时屈服强度高和均匀延伸率低的塑性变形行为,提出预变形孪晶与ω相相结合的强韧化途径.采用金相显微镜观察、X射线衍射分析、维氏硬度及拉伸性能测试,研究了冷轧预变形诱发{332}孪晶对Ti-15Mo合金显微组织、ω相析出以及力学性能的影响.结果表明:当冷轧变形量为5％时,预变形诱发孪晶对等温ω相的析出无明

【作者】

：

向力闵小华白鹏飞程从前赵杰

【机构】

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大连理工大学材料科学与工程学院,大连,116024

【出处】

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第十六届全国钛及钛合金学术交流会

【发表日期】

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2016年12期

【关键词】

：

钛钼合金冷轧预变形 ω相析出力学性能显微组织

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基于βTi-Mo合金以{332}<113>孪生方式变形时屈服强度低和均匀延伸率高,而析出脆性ω相以位错滑移变形时屈服强度高和均匀延伸率低的塑性变形行为,提出预变形孪晶与ω相相结合的强韧化途径.采用金相显微镜观察、X射线衍射分析、维氏硬度及拉伸性能测试,研究了冷轧预变形诱发{332}<113>孪晶对Ti-15Mo合金显微组织、ω相析出以及力学性能的影响.结果表明:当冷轧变形量为5％时,预变形诱发孪晶对等温ω相的析出无明显影响;预变形诱发孪晶以及孪晶闯的交互作用导致的动态晶粒细化效应,延迟了缩颈的产生,使得合金在时效后能表现出良好的均匀延伸率.

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冷轧预变形诱发{332}孪晶对Ti-Mo合金力学性能的影响

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