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首页 > 过刊浏览>2022年第51卷第7期 >2336-2343. DOI:10.12442/j.issn.1002-185X.E20210013
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Mo元素含量对TiAl合金微观组织及力学性能的影响
作者:
作者单位:

1.北京科技大学 工程技术研究院，北京 100086;2.瑞典皇家理工学院 材料科学与工程学院，瑞典 斯德哥尔摩 SE-10044;3.烟台南山学院 工学院，山东 烟台 265713

基金项目:

Shandong Provincial Natural Science Foundation (ZR201911180051), Guangxi Special Funding Program for Innovation-Driven Development (GKAA17202008) and National Natural Science Foundation of China (Grant No. 52004029)


Effect of Mo Element on Microstructure and Mechanical Properties of TiAl Alloys
Author:
Affiliation:

1.Institute of Engineering Technology, University of Science and Technology Beijing, Beijing 100083, China;2.Department of Materials Science and Engineering, KTH Royal Institute of Technology, Stockholm SE-10044, Sweden;3.College of Engineering, Yantai Nanshan University, Yantai 265713, China

Fund Project:

Shandong Provincial Natural Science Foundation (ZR201911180051); Guangxi Special Funding Program for Innovation-Driven Development (GKAA17202008); National Natural Science Foundation of China (52004029)

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    摘要:

    设计了4种不同Mo含量的TiAl合金，使用扫描电子显微镜、纳米压痕、热模拟压缩等手段对Mo-TiAl合金的微观组织以及力学性能进行了研究。结果显示，随着Mo含量升高，组织中γ相含量逐渐减少，而β相含量逐渐增多。Mo元素主要以β相的形式存在于TiAl合金中。在热等静压过程中，Mo元素从γ相和α2相向β相中扩散；Mo-TiAl合金的纳米压痕硬度在Mo含量为1.59%（原子分数，下同）时达到最大，并且纳米压痕硬度和片层间距呈负相关；随着Mo含量升高，Mo-TiAl合金热压缩流变应力降低，Mo含量为2.11%和3.94%的TiAl合金由于Al元素偏析导致其塑性较差。

    Abstract:

    Four TiAl alloys with different Mo contents were designed, and the microstructure and mechanical properties of these Mo-TiAl alloys were studied by scanning electron microscope, nanoindentation, and hot compression simulation methods. Results show that with increasing the Mo content, the content of γ phase is gradually decreased, while that of β phase is gradually increased. The Mo element mainly exists in the form of β phase in the TiAl alloy. During the hot isostatic pressing process, the Mo element is diffused from the γ and α2 phases to the β phase. The nanoindentation hardness of Mo-TiAl alloy reaches the maximum when the Mo content is 1.59at%, and it is negatively correlated with the interlamellar space. As the content of Mo element increases, the flow stress of Mo-TiAl alloys decreases, and the TiAl alloys with 2.11at% and 3.94at% Mo addtion have poor plasticity due to the Al element segregation.

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田世伟,何安瑞,刘建华,张业飞,张韵,杨永刚,王家毅,江海涛.Mo元素含量对TiAl合金微观组织及力学性能的影响[J].稀有金属材料与工程,2022,51(7):2336~2343.[Tian Shiwei, He Anrui, Liu Jianhua, Zhang Yefei, Zhang Yun, Yang Yonggang, Wang Jiayi, Jiang Haitao. Effect of Mo Element on Microstructure and Mechanical Properties of TiAl Alloys[J]. Rare Metal Materials and Engineering,2022,51(7):2336~2343.]
DOI：10.12442/j. issn.1002-185X. E20210013

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  • 收稿日期:2021-05-07
  • 最后修改日期:2021-05-27
  • 录用日期:2021-06-21
  • 在线发布日期: 2022-08-03
  • 出版日期: 2022-07-27

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