董多,王琪斌,张树志,朱冬冬

• 1:衢州学院机械工程学院
• 2:北京科技大学新金属材料国家重点实验室
• 3:太原理工大学材料科学与工程学院

摘要(Abstract)：

采用真空电弧熔炼炉制备了不同Nb含量的Ti-48Al合金,通过X射线衍射仪(XRD)、扫描电镜(SEM)、能谱仪(EDS)等分析了不同Nb含量对Ti-48Al合金组织及力学性能的影响规律。结果表明:当Nb含量为2%和4%时,合金晶界处无B2相析出;当Nb含量为6%时,有明显的B2相析出。压缩实验结果表明,随着Nb含量的增加,合金的强度和塑性均呈现先增加后降低的趋势,当Nb含量为4%时,合金的抗压强度和压缩率最佳,分别为2187.77 MPa和38.33%。当不添加Nb时,合金以穿片层断裂为主,添加Nb使得合金局部发生塑性断裂。

关键词(KeyWords)： Ti-48Al合金;显微组织;B2相;压缩性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51501100,51801112);; 浙江省自然科学基金(Y18E010014)

作者(Author): 董多,王琪斌,张树志,朱冬冬

DOI: 10.13289/j.issn.1009-6264.2018-0359

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