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Structural evolution and stability of mechanically alloyed Fe-Ni nanocrystalline

  • Chen Zi 
  • Liu Qi-zheng 
  • Meng Qing-ping 
  • Rong Yong-hua Email author
Article

Abstract

The structural evolution and stability of Fe100−xNix (x=10, 20, 35, 50) alloys prepared by mechanical alloying were investigated through X-ray diffraction analysis and transmission electron microscopy. The intrinsic conditions of preparation determining phase stability in nanocrystalline were clarified. After being milled for 120 h, the powders of Fe90Ni10 and Fe80Ni20 consist of a single α(bcc) phase, Fe30Ni30 powders are a single γ(fcc), and for Fe65Ni35 powders there is co-existence of α and γ phases. The as-milled Fe80Ni20 powders annealed at 680 °C exhibits the stability of high-temperature γ phase at room temperature, which is consistent with the theoretical prediction.

Key words

mechanical alloying Fe-Ni nanocrystalline structural evolution phase stability martensitic transformation 

CLC number

TG111. 5 TG115. 12+ 

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Copyright information

© Central South University 2005

Authors and Affiliations

  • Chen Zi 
    • 1
  • Liu Qi-zheng 
    • 1
  • Meng Qing-ping 
    • 1
  • Rong Yong-hua 
    • 1
    Email author
  1. 1.School of Materials Science and EngineeringShanghai Jiaotong UniversityShanghaiChina

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