Influence of dislocation separation on dynamic strain aging in a Fe-Mn-C austenitic steel

Motomichi Koyama, Takahiro Sawaguchi, Kaneaki Tsuzaki

研究成果: Article査読

24 被引用数 (Scopus)

抄録

The influences of deformation temperature and strain rate on the serrated flow behavior of a Fe-17Mn-0.3C alloy with a low stacking fault energy were investigated by the tensile tests in a temperature range of 273 to 523 K. Three regions were found when the deformation temperature was plotted against the critical strains for the onset of serrations. The critical strain decreased in the region of 273 to 323 K, increased in that of 323 to 423 K, and decreased again in that of 423 to 523K with increasing temperature. The first two regions are well known. However, the third region corresponding to that of high temperature has not been reported, and this region could be interpreted by separately considering the interactions of solute atoms with leading and trailing partials. Since the velocity of the leading partials is assumed to be significantly higher than that of the trailing partials, the critical strains in the first and third regions were concluded to result from trapping the trailing partials and the leading partials, respectively.

本文言語English
ページ(範囲)546-552
ページ数7
ジャーナルMaterials Transactions
53
3
DOI
出版ステータスPublished - 2012
外部発表はい

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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