+高级检索
Ni含量对镍钛合金的力学和摩擦学性能的影响
作者:
作者单位:

1.西安建筑科技大学冶金学院;2.清华大学天津高端装备研究院

作者简介:

通讯作者:

中图分类号:

基金项目:

国家自然科学基金项目(面上项目,重点项目,重大项目)


Effects of nickel content on mechanical and tribological properties of NiTi alloy
Author:
Affiliation:

1.School of Materials Science and Engineering,Xi’an University of Architecture and Technology,Xi’an;2.Tianjin Research Institute for Advanced Equipment,Tsinghua University

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    本文通过机械合金化和放电等离子烧结法(SPS)在1000 ℃制备具有不同Ni含量的镍钛合金,采用显微硬度仪研究不同Ni含量NiTi合金的显微硬度变化规律,通过摩擦磨损试验机和万能试验机研究NiTi合金室温摩擦学性能和力学性能,采用三维白光轮廓仪扫描磨痕形貌并计算NiTi合金的磨损体积和磨损率,采用扫描电子显微镜研究磨损表面形貌。结果表明:通过球磨和SPS制备的NiTi合金组织均匀,在镍含量低于50 wt. %时,显微组织中只有NiTi相和NiTi2相,镍含量高于50 wt. %时,显微组织中只有NiTi相和Ni3Ti相。Ni含量为50 wt. %时可以显著提高NiTi合金的显微硬度,随着镍含量增加NiTi合金的抗压强度降低,Ni含量为55 wt. %时可以显著改善NiTi合金的摩擦学性能,其主要磨损机理是磨粒磨损和疲劳磨损。

    Abstract:

    In this investigation, NiTi alloys with different Ni contents were fabricated by mechanical alloy and spark plasma sintering (SPS) at 1000℃. Microhardness, mechanical and tribological properties of the NiTi alloys with different Ni contents were evaluated by the microhardness tester, universal testing machine and friction and wear tester. The wear volumes and wear rates were calculated by three-dimensional white light profilometer. The wear morphologies of NiTi alloys were analyzed by scanning electron microscopy (SEM) with energy disperse spectroscopy (EDS). The experimental results showed that the microstructures of NiTi alloy were uniformed in general. When the content of Ni was lower than 50 wt. %, the NiTi phase and NiTi2 phase were presented in the microstructures. While the NiTi phase and Ni3Ti phase were presented in the microstructures with more than 50 wt. % Ni contents. When the nickel content is 50 wt. %, the microhardness of the alloys were significantly improved. For the compressive strengths, these of NiTi were decreased as the Ni contents increased. When the nickel content is 55 wt. %, the tribological properties of the alloy can be significantly improved, because the E/H value of the NiTi alloy is the lowest. The wear mechanisms of NiTi alloy are abrasive wear and fatigue wear through the wear surfaces examined by SEM and EDS.

    参考文献
    相似文献
    引证文献
引用本文

王伟,程鹏,李小磊,高原,王快社. Ni含量对镍钛合金的力学和摩擦学性能的影响[J].稀有金属材料与工程,2021,50(12):4418~4428.[WANG Wei, CHENG Peng, LI Xiaolei, GAO Yuan, WANG Kuaishe. Effects of nickel content on mechanical and tribological properties of NiTi alloy[J]. Rare Metal Materials and Engineering,2021,50(12):4418~4428.]
DOI:10.12442/j. issn.1002-185X.20200977

复制
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2020-12-17
  • 最后修改日期:2021-02-28
  • 录用日期:2021-03-08
  • 在线发布日期: 2022-01-09
  • 出版日期: 2021-12-24