金属热处理 ›› 2022, Vol. 47 ›› Issue (2): 48-52.DOI: 10.13251/j.issn.0254-6051.2022.02.009

• 材料研究 • 上一篇    下一篇

应力对单晶高温合金再结晶的影响

李永顺1, 玄伟东1, 段方苗2, 赵玉娟1, 李俊杰1, 王保军1, 任兴孚1, 任忠鸣1   

  1. 1.上海大学 材料科学与工程学院 省部共建高品质特殊钢冶金与制备国家重点实验室, 上海 200444;
    2.中国联合重型燃气轮机技术有限公司, 北京 100061
  • 收稿日期:2021-09-25 修回日期:2021-12-05 出版日期:2022-02-25 发布日期:2022-04-01
  • 通讯作者: 玄伟东,副研究员,E-mail:wdxuan@shu.edu.cn
  • 作者简介:李永顺(1995—),男,硕士研究生,主要研究方向为热处理过程中单晶高温合金的再结晶,E-mail:2518891651@qq.com。
  • 基金资助:
    国家科学技术重大项目(2017-Ⅶ-0008-0102);国家自然科学基金(92060104);国家自然科学基金重大计划(51690162);上海市科学技术委员会(20511107700);中国重燃项目(F035)

Effect of stress on recrystallization of single crystal superalloy

Li Yongshun1, Xuan Weidong1, Duan Fangmiao2, Zhao Yujuan1, Li Junjie1, Wang Baojun1, Ren Xingfu1, Ren Zhongming1   

  1. 1. State Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China;
    2. China United Gas Turbine Technology Co., Ltd., Beijing 100061, China
  • Received:2021-09-25 Revised:2021-12-05 Online:2022-02-25 Published:2022-04-01

摘要: 通过试验和理论计算相结合的方法研究了应力对单晶高温合金再结晶形成规律的影响。结果表明,再结晶的形成与应力密切相关。当施加的应力高于临界应力时才会产生再结晶,而低于临界应力则不会产生再结晶,并且再结晶临界应力随着温度的升高而降低。在相同温度下,试验合金的再结晶层厚度随着应力的增加而呈线性增加;在相同应力下,再结晶层厚度随着温度的升高而呈指数增长。此外,随着温度的升高,再结晶层厚度的增长速率随应力的增加而增大。

关键词: 单晶高温合金, 再结晶, 应力, 温度, γ′相

Abstract: Effect of stress on recrystallization formation law of single crystal superalloy was studied through a combination of experiment and theoretical calculation. The results show that the formation of recrystallization is closely related to stress. Recrystallization only occurs when the applied stress is higher than the critical stress, but not occur when the applied stress is lower than the critical stress, meanwhile the critical stress of recrystallization decreases with the increase of temperature. At the same temperature, the thickness of recrystallization layer of the tested alloy increases linearly with the increase of stress. Under the same stress, the thickness of recrystallization layer increases exponentially with the increase of temperature. In addition, with the increase of temperature, the increasing rate of recrystallization layer thickness accelerates due to the increase of stress.

Key words: single crystal superalloy, recrystallization, stress, temperature, γ′ phase

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