+高级检索
预时效工艺对Ti-3.5Al-5Mo-6V-3Cr-2Sn-0.5Fe钛合金组织与性能的影响
DOI:
作者:
作者单位:

1.内蒙古工业大学材料科学与工程学院;2.西北有色金属研究院

作者简介:

通讯作者:

中图分类号:

基金项目:

国家自然科学基金青年基金(项目号516010990);内蒙古自然科学基金(项目号2016BS0506);内蒙古工业大学科学研究重点基金(项目号ZD201607); 内蒙古自治区重大基础研究开放课题


Effect of Pre Aging Microstructure on the Mechanical Properties of Ti-3.5Al-5Mo-6V-3Cr-2Sn-0.5Fe
Author:
Affiliation:

1.School of Materials Science and Engineering,Inner Mongolia University of Technology;2.Northwest Institute for Nonferrous Metal Research,Xi’an

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:

    对Ti-3.5Al-5Mo-6V-3Cr-2Sn-0.5Fe钛合金分别进行单级和双级时效热处理,对比研究双级时效工艺对高强β钛合金组织与性能影响。单级时效温度为550℃,双级时效工艺采用在400℃预时效之后再进行550℃下的再时效处理。研究结果表明,合金在400℃预时效时析出了ω相,随着预时效时间的延长,ω相最终转变为α相。相比单级时效而言,合金经双级时效后其次生α相显微组织得到明显细化,其原因主要是因为预时效阶段为后续较高温度下次生α相的形核与长大提供了更多的形核质点。双级时效工艺可以大幅提高合金的强度及硬度,但是塑性略有下降。

    Abstract:

    The microstructure evolution and mechanical properties of Ti-3.5Al-5Mo-6V-3Cr-2Sn-0.5Fe alloy after single and duplex aging treatment were studied. The Single aging temperature was 550℃, the duplex aging was pre-aged at 400 ℃ then re-aged at 550℃. The results showed that when the alloy pre-aged at 400℃, the ω phase was precipitated. As the pre-aging time prolonged, the ω phase finally changed to the α phase. Duplex aging was effective to yield the α phase fine dispersion, and the pre precipitated isothermal ω phase provided more uniform nucleation position for precipitation of α phase than single aging so as to improve the alloy tensile strengthen greatly. During pre aging, the isothermal ω phase could precipitate sufficiently so as to provide more advantageous nucleation position to precipitate very fine α phase of acicular style, and the strengthening effect was the same with that of duplex aging.

    参考文献
    相似文献
    引证文献
引用本文

杜赵新,刘国龙,崔晓明,刘慧敏,程军.预时效工艺对Ti-3.5Al-5Mo-6V-3Cr-2Sn-0.5Fe钛合金组织与性能的影响[J].稀有金属材料与工程,2019,48(6):1904~1908.[Du Zhaoxin, Liu Guolong, Cui Xiaoming, Liu Huimin, Cheng Jun. Effect of Pre Aging Microstructure on the Mechanical Properties of Ti-3.5Al-5Mo-6V-3Cr-2Sn-0.5Fe[J]. Rare Metal Materials and Engineering,2019,48(6):1904~1908.]
DOI:[doi]

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:2017-12-04
  • 最后修改日期:2018-02-03
  • 录用日期:2018-05-08
  • 在线发布日期: 2019-07-30
  • 出版日期: