金属热处理 ›› 2023, Vol. 48 ›› Issue (5): 279-282.DOI: 10.13251/j.issn.0254-6051.2023.05.044

• 工艺研究 • 上一篇    下一篇

TC11钛合金热变形行为及微观组织演变

吕学春1, 赵文革1, 袁明荣2, 李恒1   

  1. 1.西安安泰叶片技术有限公司, 陕西 西安 710021;
    2.中国航发西安航空发动机有限公司, 陕西 西安 710021
  • 收稿日期:2022-11-11 修回日期:2023-03-14 出版日期:2023-05-25 发布日期:2023-06-21
  • 作者简介:吕学春(1986—),男,工程师,硕士,主要研究方向为钛合金叶片精锻工艺,E-mail: lvxuechun4241@163.com

Hot deformation behavior and microstructure evolution of TC11 titanium alloy

Lü Xuechun1, Zhao Wenge1, Yuan Mingrong2, Li Heng1   

  1. 1. Xi'an Airfoil Technology Co., Ltd., Xi'an Shaanxi 710021, China;
    2. AECC Xi'an Aero-Engine Ltd., Xi'an Shaanxi 710021, China
  • Received:2022-11-11 Revised:2023-03-14 Online:2023-05-25 Published:2023-06-21

摘要: 研究了TC11钛合金在高温下的变形行为以及显微组织变化。结果表明,在变形过程中,合金的流动应力随着变形温度的升高以及应变速率的降低而降低;同时合金的流动应力软化程度随着应变速率的升高而增加。通过真应变为0.6的热加工图分析可知,能量耗散率最高出现在940 ℃,0.001 s-1的条件下,达到0.71;塑性失稳区出现在920~930 ℃、0.9~10 s-1的变形工艺参数范围。TC11钛合金在热变形过程中,应变速率的增加、变形量的增加以及变形温度的升高都有利于促进α相的动态再结晶。

关键词: TC11钛合金, 热变形, 热加工图, 显微组织

Abstract: Deformation behavior and microstructure evolution of the TC11 titanium alloy at high temperatures were investigated. The results show that the flow stress of the alloy decreases as the deformation temperature increases and the strain rate decreases during deformation, and the degree of softening of the flow stress increases as the strain rate increases. By analysis of the processing map at true strain of 0.6, the highest energy dissipation rate is found at 940 ℃ and 0.001 s-1 and reaching 0.71. The plastic instability zone is found in the range of 920-930 ℃ and 0.9-10 s-1. The dynamic recrystallization of the α-phase during hot deformation of the TC11 titanium alloy is promoted by increase of the strain rate, the deformation volume and the deformation temperature.

Key words: TC11 titanium alloy, hot deformation behavior, processing map, microstructure

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