郭依航,景然,刘以柔,吴倩,刘禹驰,李江华,炊鹏飞

• 1:陕西理工大学材料科学与工程学院
• 2:陕西理工大学矿渣综合利用环保技术国家地方联合工程实验室

摘要(Abstract)：

通过非自耗真空电弧熔炼炉制备了铸态Ti-6Al-xMo(x=0、4、8、12、16和20 mass%)合金，采用X射线衍射仪(XRD)、光学显微镜(OM)、扫描电镜(SEM)、硬度测试和压缩实验等研究了不同Mo元素含量的Ti-6Al-xMo合金的微观组织和力学性能。结果表明：随着Mo元素含量的增加，合金发生了α→α′+β→α″+β→β的相变过程。Ti-6Al合金显微组织由分布不均匀的片状α相组成。当Mo元素含量为4 mass%时，合金中出现明显的β晶界和细针状的α′马氏体相；当Mo元素含量增加至12 mass%时，合金中出现细针状的α″马氏体相和不连续的亚晶界；当Mo元素含量增加至16 mass%以上时，合金组织由粗大等轴β晶粒组成。铸态Ti-6Al合金的应力-应变曲线呈现“PLC效应”;Ti-6Al-16Mo和Ti-6Al-20Mo合金的压缩塑性超过50%仍未断裂，表现出良好的塑性；断口形貌表明添加Mo元素后所有合金均为韧性断裂。

关键词(KeyWords)： Ti-6Al-xMo合金;相结构;显微组织;力学性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51701111,51901120);; 陕西省自然科学基础研究计划项目(2024JC-YBMS-355,2024JC-YBMS-292)

作者(Author): 郭依航,景然,刘以柔,吴倩,刘禹驰,李江华,炊鹏飞

DOI: 10.13289/j.issn.1009-6264.2023-0570

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