东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2011, Vol. 32 ›› Issue (12): 1733-1736.DOI: -

• 论著 • 上一篇    下一篇

静电场时效处理温度对GH4169合金点缺陷的影响

王尧;王磊;晁月盛;吕旭东;   

  1. 东北大学材料各向异性与织构教育部重点实验室;东北大学理学院;北京钢铁研究总院;
  • 收稿日期:2013-06-19 修回日期:2013-06-19 发布日期:2013-04-04
  • 通讯作者: -
  • 作者简介:-
  • 基金资助:
    国家重点基础研究发展计划项目(2010CB631203);;

Effect of aging temperatures with electric field on point defects in GH4169 alloy

Wang, Yao (1); Wang, Lei (1); Chao, Yue-Sheng (2); Lü, Xu-Dong (3)   

  1. (1) Key Laboratory for Anisotropy and Texture of Materials, Northeastern University, Ministry of Education, Shenyang 110819, China; (2) School of Sciences, Northeastern University, Shenyang 110819, China; (3) Central Iron and Steel Research Institute, Beijing 100081, China
  • Received:2013-06-19 Revised:2013-06-19 Published:2013-04-04
  • Contact: Wang, L.
  • About author:-
  • Supported by:
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摘要： 将静电场时效处理应用于GH4169镍基高温合金,以研究静电场对合金内部点缺陷的影响.结果表明:500℃无电场时效处理所提供的能量不足以使一些处在正常点阵位置上的原子跳出能垒而形成新的单空位,但可促进大量处于畸变位置上和邻近空位的原子实现再次的跃迁.强静电场的施加使合金内部不带电原子产生梯度力,加速了原子的振动.在600,700和800℃时效20 h过程中施加8 kV/cm强静电场,其平均正电子湮没寿命提高6%~7%,增大了合金内部平均空位尺寸.

关键词: 静电场, 时效, GH4169合金, 点缺陷, 正电子湮没

Abstract: In order to investigate the effect of electric field on point defects, an external electric field was applied to GH4169 superalloy during aging at different temperatures. The results indicated that the energy provided by thermal aging at 500°C without electric field is not enough to promote the atoms jump out of the normal lattice position and form new monovacancies, but it can promote the atoms at lattice distortion position and adjacent to vacancy to jump again. The gradient force has been produced on uncharged atoms by intense electric field applied, which can enhance atomic thermal vibration. The average positron annihilation lifetime increases by 6%~7% when the alloy aged at 600, 700 and 800°C with 8kV/cm intense electric field, leading to the increasing of average size of vacancy in the alloy.

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