Prediction of transition stress in solution hardened alloys at high temperatures by flow stress predicting method

Hideaki Miyagawa, Tatsuya Morikawa, Toshihiro Okazaki, Hideharu Nakashima, Hideo Yoshinaga

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The stress exponent, n, which is the slope in a log σ-log (d/ε/dt) curve is about 3 in the intermediate stress range (region M) in the steady state deformation characteristics at high temperature in a solid solution hardened alloy. In the higher stress range (region H) and lower stress range (region L), however, the stress exponents are larger than those in region M. In this paper, the upper transition stress (σU) between regions M and H and the lower transition stress (σL) between regions M and L for f.c.c. Al-Mg and b.c.c. Fe-Mo alloys are calculated using the flow stress predicting method and compared with the experimental results. It is found that the predicted transition stress σU or σL almost agree with the experimental one. The flow stress prediction method based on the solute atmosphere drag mechanism should be applied on the stress range from σL to σU.

Original languageEnglish
Pages (from-to)367-376
Number of pages10
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume60
Issue number4
DOIs
Publication statusPublished - Jan 1 1996
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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