TC6钛合金超塑性变形

丁凌 王志录 孙前江 陈建 王高潮

丁凌, 王志录, 孙前江, 陈建, 王高潮. TC6钛合金超塑性变形[J]. 航空材料学报, 2016, 36(6): 23-28. doi: 10.11868/j.issn.1005-5053.2016.6.004
引用本文: 丁凌, 王志录, 孙前江, 陈建, 王高潮. TC6钛合金超塑性变形[J]. 航空材料学报, 2016, 36(6): 23-28. doi: 10.11868/j.issn.1005-5053.2016.6.004
Ling DING, Zhilu WANG, Qianjiang SUN, Jian CHEN, Gaochao WANG. Superplastic Deformation of TC6 Alloy[J]. Journal of Aeronautical Materials, 2016, 36(6): 23-28. doi: 10.11868/j.issn.1005-5053.2016.6.004
Citation: Ling DING, Zhilu WANG, Qianjiang SUN, Jian CHEN, Gaochao WANG. Superplastic Deformation of TC6 Alloy[J]. Journal of Aeronautical Materials, 2016, 36(6): 23-28. doi: 10.11868/j.issn.1005-5053.2016.6.004

TC6钛合金超塑性变形

doi: 10.11868/j.issn.1005-5053.2016.6.004
基金项目: 

江西省科技支撑重点项目 CB201403026

江西省自然科学基金项目 20142BAB206021

中航工业校企合作项目 GHK201503009,GHK201503054

详细信息
    通讯作者:

    王高潮(1956-),男,教授,主要从事钛合金超塑成形研究,(E-mail)wanggaochao@nchu.edu.cn

  • 中图分类号: TG316

Superplastic Deformation of TC6 Alloy

  • 摘要: 对TC6钛合金在800~900℃温度区间内,分别进行应变速率为0.0001~0.1 s-1的恒应变速率法拉伸实验和最大m值法超塑性拉伸实验,获得拉伸过程应力-应变曲线,并采用金相显微镜对拉伸后断口附近显微组织进行分析。结果表明:TC6合金表现出良好的超塑性性能,随着应变速率或温度的升高,伸长率先增大后减小,恒应变速率拉伸时,在温度850℃、应变速率0.001 s-1条件下伸长率可达到993%;在同一变形温度下最大m值法拉伸能获得比恒应变速率法更好的超塑性,850℃时伸长率达到1353%;TC6合金在超塑性变形过程中发生了明显的动态再结晶,并随着应变速率和温度的升高动态再结晶行为增强。

     

  • 图  1  TC6原始材料组织

    Figure  1.  Microstructure of TC6 alloy as-received

    图  2  最大m值法及恒应变速率法超塑性拉伸试样 (a)最大m值法;(b)850 ℃恒应变速率法;(c)$\dot{\varepsilon }$=0.001 s-1恒应变速率法

    Figure  2.  Samples after superplastic tensile test with the Max m SPD and the constant strain rate (a)the Max m SPD;(b)constant strain rate tensile at 850 ℃;(c)constant strain rate tensile at $\dot{\varepsilon }$=0.001 s-1

    图  3  最大m值法条件下拉伸应力-应变及应变速率-应变曲线

    Figure  3.  Stress-strain and strain rate-stain curves in the Max m SPD tensile test

    图  4  TC6恒应变速率拉伸应力-应变曲线

    Figure  4.  Stress-strain curves of constant stain rate test (a) $\dot{\varepsilon }$=0.01 s-1;(b)T=850 ℃

    图  5  850 ℃下TC6超塑拉伸变形后的显微组织

    Figure  5.  Microstructure after superplastic tensile test at 850 ℃ (a) the Max m SPD ;(b)$\dot{\varepsilon }$=0.0001 s-1 ;(c)$\dot{\varepsilon }$=0.001 s-1;(d)$\dot{\varepsilon }$=0.01 s-1

    图  6  应变速率0.001 s-1时不同温度TC6拉伸变形后的显微组织

    Figure  6.  Microstructure after tensile test at $\dot{\varepsilon }$=0.001 s-1 (a)800 ℃;(b)900 ℃

    表  1  TC6合金(棒料)化学成分(质量分数/%)

    Table  1.   Chemical composition of TC6 alloy(mass fraction/%)

    AlMoCrFeSiTi
    6.252.431.450.480.3Bal.
    下载: 导出CSV
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出版历程
  • 收稿日期:  2015-12-16
  • 修回日期:  2016-02-01
  • 刊出日期:  2016-12-01

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