Acta Metallurgica Sinica (English Letters) ›› 2011, Vol. 24 ›› Issue (4): 295-300.DOI: 10.11890/1006-7191-114-295

• 研究论文 • 上一篇    下一篇

A novel approach to dynamic recrystallization nucleation for a nickel-base superalloy

王帅1,王磊2,刘杨3   

  1. 1. 北京航空材料研究院
    2. 东北大学
    3. 东北大学材料与冶金学院
  • 收稿日期:2010-08-24 修回日期:2010-11-11 出版日期:2011-08-25 发布日期:2011-08-18
  • 通讯作者: 王帅

Nucleation mechanism of a nickel-base superalloy during dynamic recrystallization

Shuai WANG1, Lei WANG1, Yang LIU1, Guohua XU2, Beijiang ZHANG2, Guangpu ZHAO2   

  1. 1. Key Laboratory for Anisotropy and Texture of Materials, Northeastern University, Shenyang 110819, China
    2. High Temperature Materials Research Institute, Central Iron and Steel Research Institute, Beijing 100081, China
  • Received:2010-08-24 Revised:2010-11-11 Online:2011-08-25 Published:2011-08-18
  • Contact: Lei WANG

Abstract: Hot compression test was carried out at 1000 ℃ to investigate the dynamic recrystallization nucleation mechanism of a nickel-base superalloy. It was found that the bulging of original grain boundaries was inhibited by carbides and deformation twins at the boundaries. Recrystallized nuclei evolved from the subgrains of dislocation reconfiguration along original grain boundaries, and the growth of the potential nuclei was carried out by the coalescence of subgrains. The necklace structure of recrystallized grains along original grain boundaries was attributed to the strain gradient from grain boundary to grain interior.

Key words: Dynamic recrystallization, Electron backscattering diffraction (EBSD), Transmission electron microscopy (TEM), Superalloy