TWIP effect and plastic instability condition in an Fe-Mn-C austenitic steel

Motomichi Koyama, Takahiro Sawaguchi, Kaneaki Tsuzaki

研究成果: Article査読

10 被引用数 (Scopus)

抄録

The correlation among deformation twin density, work hardening, and tensile ductility was investigated in an Fe-18Mn-1.2C steel. The twin density was varied by changing tensile deformation temperature from 123 to 523 K. The deformation twin density at a 10% plastic strain decreased with increasing deformation temperature except for the condition (123K) in which martensitic transformation occurred. The work hardening rate at the early deformation stage decreased due to the reduction in the deformation twin density; however, the decrease in work hardening rate did not affect the uniform elongation. The uniform elongation was determined by a plastic instability condition. Thus, the important factor for the uniform elongation is the work hardening rate in the later deformation stage. Additionally, we discussed influences of dynamic strain aging and e-martensitic transformation which accelerated fracture.

本文言語English
ページ(範囲)229-236
ページ数8
ジャーナルTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
98
6
DOI
出版ステータスPublished - 2012
外部発表はい

ASJC Scopus subject areas

  • 凝縮系物理学
  • 物理化学および理論化学
  • 金属および合金
  • 材料化学

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