Time and flow stress dependences of internal stress during stress relaxation

Yoshinori Kusuda*, Kodai Murasawa, Yurina Suzuki, Shinsuke Suzuki, Masato Takamura, Tomoyuki Hakoyama, Yoshimasa Ikeda, Yoshie Otake, Takayuki Hama

*この研究の対応する著者

研究成果: Conference article査読

抄録

Stress relaxation is a potential cause of formability improvement. To describe stress relaxation, the measurement of internal stress is essential. We investigated the time and flow stress dependences of the internal stress by conducting a strain-rate-change test and stress-dip test. The comparison between the two tests revealed that the internal stress decreases as the stress relaxation progresses over time. Moreover, the internal stress decreases as the flow stress decreases. We propose that the time dependence of the internal stress could have been caused by the flow stress dependence of the internal stress because the flow stress-internal stress and the initial stress-internal stress relationships are approximately identical.

本文言語English
ページ(範囲)1746-1753
ページ数8
ジャーナルProcedia Manufacturing
15
DOI
出版ステータスPublished - 2018
イベント17th International Conference on Metal Forming, METAL FORMING 2018 - Toyohashi, Japan
継続期間: 2018 9 162018 9 19

ASJC Scopus subject areas

  • 産業および生産工学
  • 人工知能

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