金属热处理 ›› 2023, Vol. 48 ›› Issue (3): 275-279.DOI: 10.13251/j.issn.0254-6051.2023.03.046

• 材料研究 • 上一篇    下一篇

纳米TiC对Al-Cu合金微观组织和性能的影响

卢雅琳1,2, 黄勇1, 王健1   

  1. 1.江苏理工学院 材料工程学院, 江苏 常州 213000;
    2.江苏省高性能材料绿色成形技术与装备重点建设实验室, 江苏 常州 213000
  • 收稿日期:2022-11-03 修回日期:2023-02-06 出版日期:2023-03-25 发布日期:2023-04-25
  • 通讯作者: 王健,实验师,博士研究生,E-mail:wjhjj1217@163.com。
  • 作者简介:卢雅琳(1967—),女,教授,博士,主要研究方向为铝基复合材料的制备及组织性能,E-mail:luyalin@163.com。
  • 基金资助:
    国家自然科学基金(51975404);常州市科技计划(CJ20220061);江苏省高校研究生创新训练计划(XSJCX20-39)

Effect of nano-sized TiC on microstructure and propertits of Al-Cu alloy

Lu Yalin1,2, Huang Yong1, Wang Jian1   

  1. 1. School of Materials Engineering, Jiangsu University of Technology, Changzhou Jiangsu 213000, China;
    2. Key Construction Laboratory of Green Forming and Equipment from Jiangsu Province, Changzhou Jiangsu 213000, China
  • Received:2022-11-03 Revised:2023-02-06 Online:2023-03-25 Published:2023-04-25

摘要: 研究了纳米TiC对Al-Cu合金铸态、轧态和热处理态微观组织和对热处理态力学性能的影响。结果表明,加入适量的纳米TiC颗粒,可以有效细化合金的微观组织。当TiC含量较小时,随着TiC含量的增加,合金在轧制变形过程中发生了动态再结晶,平均晶粒尺寸减小。当TiC含量超过0.5%(质量分数,下同)时,再结晶晶粒又逐渐长大粗化。当纳米TiC含量为0.5%时,合金的综合性能最优,与基体相比,抗拉强度和伸长率分别提升了约18.6%和7%。TiC/Al-Cu合金在热处理过程中产生了析出相和大量位错,这有助于提高材料的力学性能。

关键词: 纳米TiC, Al-Cu合金, 微观组织, 力学性能

Abstract: Effects of nano-sized TiC particles on the microstructure of the Al-Cu alloy at as-cast, as-rolled, and heat-treated states and on the mechanical properties after heat treatment were studied. The results show that the microstructure of the alloy can be effectively refined by adding appropriate nano-TiC particles. When the TiC content is small, with the increase of TiC content, the alloy undergoes dynamic recrystallization during rolling deformation, and the average grain size decreases. When the TiC content exceeds 0.5% (mass fraction), the recrystallized grains gradually grow and coarsen. When the content of nano-TiC is 0.5%, the comprehensive properties of the alloy are the best. Compared with the matrix, the tensile strength and elongation increase by 18.6% and 7% respectively. During heat treatment, precipitates and a large number of dislocations are produced in the TiC/Al-Cu alloy, which is helpful to improve the mechanical properties of the material.

Key words: nano-sized TiC, Al-Cu alloy, microstructure, mechanical properties

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