局所的なひずみの不均一分布とマクロな応力-ひずみ曲線を同時に再現する試み

Translated title of the contribution: Bridging between Heterogeneous Local Strain Distribution and Macroscopic Stressstrain Curves

Manabu Takahashi, Kotaro Ueno, Kenta Sakaguchi, Kohtaro Hayashi, Hiroyuki Kawata, Shigeto Yamasaki

Research output: Contribution to journalArticlepeer-review

Abstract

A modified continuum composite model was utilized to analyze the stress–strain behavior of asquenched steels with a fully martensitic microstructure. The model was employed to express the stress– strain curves obtained by a simple tensile test and those obtained by forward and backward loading using a simple shear test machine. The study confirmed that the model can represent the stress–strain behavior under both forward and backward deformation. In addition, the evolution of local strain distributions during plastic deformation was investigated using a digital image correlation method. The strain distributions and their evolution during deformation were qualitatively represented using this model. The discrepancies between the model calculations and experiments are due to the limitations of the iso-work assumption and the impact of slip deformation on the macroscopic work-hardening behavior of martensitic steels. Highly strain-concentrated regions aligned along the longitudinal direction of the lath and block, known as in-lath-plane slips, may not play an important role in the work-hardening behavior of as-quenched martensitic steels. However, the other slips, namely the out-of-lath slip, may play a significant role in the work hardening of as-quenched martensitic steels.

Translated title of the contributionBridging between Heterogeneous Local Strain Distribution and Macroscopic Stressstrain Curves
Original languageJapanese
Pages (from-to)90-100
Number of pages11
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume110
Issue number3
DOIs
Publication statusPublished - 2024

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry

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