Effect of Interstitial Elements on Hall-Petch Coefficient of Ferritic Iron

DOI Web Site 被引用文献48件 参考文献32件 オープンアクセス
  • Takeda Kengo
    Graduate Student, Department of Materials Science and Engineering, Kyushu University
  • Nakada Nobuo
    Department of Materials Science and Engineering, Kyushu University
  • Tsuchiyama Toshihiro
    Department of Materials Science and Engineering, Kyushu University
  • Takaki Setsuo
    Department of Materials Science and Engineering, Kyushu University

書誌事項

公開日
2008
DOI
  • 10.2355/isijinternational.48.1122
公開者
一般社団法人 日本鉄鋼協会

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説明

Yield strength was investigated in iron with different grain size and different contents of carbon and nitrogen. The Hall–Petch coefficient; ky is originally very small in high purity iron (about 100 MPa·μm1/2) but it increases with increasing the amount of solute carbon content. The value of ky is enlarged to around 550 MPa·μm1/2 by 60 ppm of solute carbon and levels off at around 600 MPa·μm1/2 in the region above 60 ppm solute carbon. On the other hand, nitrogen hardly influences the ky value. The mechanism of the change in Hall–Petch coefficient was then discussed in terms of the grain boundary segregation of carbon and nitrogen atoms.

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