Characterization of creep deformation mechanism and evaluation of dislocation mobility of modified 9Cr-1Mo steel by stress change test

Hiroyuki Hayakawa; Daisuke Terada; Fuyuki Yoshida; Hideharu Nakashima; Yasufumi Gotou

doi:10.2320/jinstmet1952.67.1_22

Characterization of creep deformation mechanism and evaluation of dislocation mobility of modified 9Cr-1Mo steel by stress change test

Hiroyuki Hayakawa, Daisuke Terada, Fuyuki Yoshida, Hideharu Nakashima, Yasufumi Gotou

Materials Physics and Engineering

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

In order to characterize the creep deformation mechanism of a Modified 9Cr-1Mo Steel, stress change tests were conducted during creep test. It was confirmed that the dislocation behavior during the creep test was in a viscous manner, since instant plastic strains were not observed at stress change tests. Also we obtained the mobility of dislocation by comparing the observed backward creep behavior after a stress reduction with the analysis which was based on the idea that the backward behavior was caused with the back-motion of bow-out dislocations in a viscous manner. The analyzed dislocation mobility was in good agreement with the theoretical one.

Original language	English
Pages (from-to)	22-26
Number of pages	5
Journal	Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume	67
Issue number	1
DOIs	https://doi.org/10.2320/jinstmet1952.67.1_22
Publication status	Published - Jan 1 2003

All Science Journal Classification (ASJC) codes

Condensed Matter Physics
Mechanics of Materials
Metals and Alloys
Materials Chemistry

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10.2320/jinstmet1952.67.1_22

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Characterization of creep deformation mechanism and evaluation of dislocation mobility of modified 9Cr-1Mo steel by stress change test. / Hayakawa, Hiroyuki; Terada, Daisuke; Yoshida, Fuyuki et al.

In: Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals, Vol. 67, No. 1, 01.01.2003, p. 22-26.

Research output: Contribution to journal › Article › peer-review

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AB - In order to characterize the creep deformation mechanism of a Modified 9Cr-1Mo Steel, stress change tests were conducted during creep test. It was confirmed that the dislocation behavior during the creep test was in a viscous manner, since instant plastic strains were not observed at stress change tests. Also we obtained the mobility of dislocation by comparing the observed backward creep behavior after a stress reduction with the analysis which was based on the idea that the backward behavior was caused with the back-motion of bow-out dislocations in a viscous manner. The analyzed dislocation mobility was in good agreement with the theoretical one.

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Characterization of creep deformation mechanism and evaluation of dislocation mobility of modified 9Cr-1Mo steel by stress change test

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