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作者:

Li, Zhi-qiang (Li, Zhi-qiang.) | Wang, De-cheng (Wang, De-cheng.) | Zhai, Yue-wen (Zhai, Yue-wen.) | Jiang, Chao (Jiang, Chao.) | Zhou, Le-yu (Zhou, Le-yu.) | Zhou, Zhi-guang (Zhou, Zhi-guang.) | Wang, Hui-zhen (Wang, Hui-zhen.) | Zhang, Zi-bo (Zhang, Zi-bo.) | Yan, Lin (Yan, Lin.) | Wang, Li-ping (Wang, Li-ping.) | Yu, Guang (Yu, Guang.)

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EI Scopus SCIE

摘要:

Static recrystallization (SRX) characteristics of a powder metallurgy superalloy were investigated by isothermal compression at 1080-1170 degrees C under strain rates of 0.01-0.1 s(-1), strains of 0.1, 0.22, or 0.5, and holding time of 0-300 s. The impacts of temperature, strain rate, holding time, and strain on the SRXed grain size, volume fraction, and microtexture were explored by electron backscatter diffraction technique. It was found that temperature played a key role in these processes. As SRX progressed, the <110> fiber parallel to the axis compression direction gradually weakened and was replaced by the <001> fiber because <001> was the preferred recrystallization orientation and grain growth direction for the Ni-based superalloy. Moreover, high temperatures and low strain rates promoted the formation of the <001> fiber. Three nucleation mechanisms during SRX process were found: grain boundary bulging, primary twin assistance, and subgrain coalescence. Grain boundary bulging occurred under all process conditions; however, at low temperatures and high strain rates, the latter two mechanisms could provide additional nucleation modes. In addition, SRX size and volume fraction models were established.

关键词:

Powder metallurgy Ni-based superalloy Prediction model Recrystallization mechanism Microtexture evolution Static recrystallization

作者机构:

  • [ 1 ] [Li, Zhi-qiang]Tsinghua Univ, Dept Mech Engn, Beijing 100084, Peoples R China
  • [ 2 ] [Wang, Li-ping]Tsinghua Univ, Dept Mech Engn, Beijing 100084, Peoples R China
  • [ 3 ] [Yu, Guang]Tsinghua Univ, Dept Mech Engn, Beijing 100084, Peoples R China
  • [ 4 ] [Li, Zhi-qiang]Beijing Res Inst Mech & Elect Technol Co Ltd, CAM, Beijing 100083, Peoples R China
  • [ 5 ] [Zhai, Yue-wen]Beijing Res Inst Mech & Elect Technol Co Ltd, CAM, Beijing 100083, Peoples R China
  • [ 6 ] [Jiang, Chao]Beijing Res Inst Mech & Elect Technol Co Ltd, CAM, Beijing 100083, Peoples R China
  • [ 7 ] [Zhou, Le-yu]Beijing Res Inst Mech & Elect Technol Co Ltd, CAM, Beijing 100083, Peoples R China
  • [ 8 ] [Zhou, Zhi-guang]Beijing Res Inst Mech & Elect Technol Co Ltd, CAM, Beijing 100083, Peoples R China
  • [ 9 ] [Wang, Hui-zhen]Beijing Res Inst Mech & Elect Technol Co Ltd, CAM, Beijing 100083, Peoples R China
  • [ 10 ] [Zhang, Zi-bo]Beijing Res Inst Mech & Elect Technol Co Ltd, CAM, Beijing 100083, Peoples R China
  • [ 11 ] [Yan, Lin]Beijing Res Inst Mech & Elect Technol Co Ltd, CAM, Beijing 100083, Peoples R China
  • [ 12 ] [Li, Zhi-qiang]China Acad Machinery Sci & Technol Grp, Beijing 100044, Peoples R China
  • [ 13 ] [Wang, De-cheng]China Acad Machinery Sci & Technol Grp, Beijing 100044, Peoples R China
  • [ 14 ] [Zhou, Zhi-guang]Beijing Univ Technol, Inst Adv Mfg & Intelligent Technol, Beijing 100124, Peoples R China

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来源 :

JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL

ISSN: 1006-706X

年份: 2024

期: 9

卷: 31

页码: 2308-2325

2 . 5 0 0

JCR@2022

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SCOPUS被引频次: 3

ESI高被引论文在榜: 0 展开所有

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