+高级检索
双重时效对TC29钛合金组织和性能的影响
DOI:
作者:
作者单位:

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:

国家重点研发计划项目(2016YFB0301201);陕西省重点研发计划项目(2017KW-ZD-08)


Influence of duplex aging on microstructure and mechanical properties of TC29 titanium alloy
Author:
Affiliation:

1.Northwest Institute for Nonferrous Metal Research,Xi´an 710016;2.China

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:

    采用OM、SEM、TEM等分析方法,结合不同的热处理工艺,系统分析了双重时效处理对含有初生α相TC29钛合金的显微组织的影响。结果表明:经两相区固溶及时效后,TC29钛合金中析出的次生α相尺寸可达到亚微米级。对于895℃固溶处理的TC29钛合金,单重时效后析出的主要是尺寸约100~300nm的弥散α相;双重时效后β转变组织中存在取向近似的 “α丛簇”,“α丛簇”中的次生α相呈细板条状;与单重时效相比,双重时效处理后TC29钛合金的显微硬度并未得到提高,相反存在小幅度的降低;β相基体在预时效过程中析出了大量ω相,同时在靠近初生α/β相界面处由于合金元素扩散导致局部元素分布不均匀,因此随后的二次时效过程中在相应位置形成了“α丛簇”。

    Abstract:

    In order to find the influence of duplex aging on microstructure and mechanical properties of TC29 titanium alloy accompanied with primary α phase, different heat treatments and analysis methods including OM, SEM, and TEM were adopted. Results show that after treated by α+β two-phase solution and aging secondary α precipitates in TC29 titanium alloy are sub-micron level. After 895℃ solution and single aging, secondary α precipitates are mainly 100~300 nm in length. After 895℃ solution and duplex aging, "α clusters" are observed in β transformed microstructure and secondary α precipitates in them are thin slat-shaped. Compared with single aging, duplex aging results in an equal or lower microhardness. During the pre-aging treatment, a large amount of ω phases precipitate in β matrix, and the local element distribution gradually becomes inconsistent due to the diffusion near the primary α/β phase interface, where the “α cluster” is locally formed during the subsequent aging process.

    参考文献
    相似文献
    引证文献
引用本文

尹雁飞,赵 彬,贾蔚菊,李思兰,毛成亮,应 扬,毛小南,赵永庆.双重时效对TC29钛合金组织和性能的影响[J].稀有金属材料与工程,2019,48(9):3001~3006.[Yin Yanfei, Zhao Bin, Jia Weijv, Li Silan, Mao Chengliang, Ying Yang, Mao Xiaonan, Zhao Yongqing. Influence of duplex aging on microstructure and mechanical properties of TC29 titanium alloy[J]. Rare Metal Materials and Engineering,2019,48(9):3001~3006.]
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:2018-11-28
  • 最后修改日期:2019-04-23
  • 录用日期:2019-05-14
  • 在线发布日期: 2019-10-09
  • 出版日期: