Dynamic strain aging caused by a new Peierls mechanism at high-temperature in iron

被引：29

作者：

Caillard, D. ^{[1
]}

Bonneville, J. ^{[2
]}

机构：

[1] CEMES CNRS, F-31055 Toulouse, France

[2] Univ Poitiers, CNRS, ENSMA, Inst Pprime,Dept Phys Mecan Mat, F-86962 Poitiers Futuroscope, France

来源：

SCRIPTA MATERIALIA | 2015年 / 95卷

关键词：

Dislocations; Iron; Dynamic strain aging; Peierls forces; FLOW;

D O I：

10.1016/j.scriptamat.2014.09.019

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In situ straining experiments and post-mortem observations have been carried out in pure Fe in order to investigate the dislocation mechanisms in the temperature range of dynamic strain aging. The results show that dislocations are locked in pure screw orientation at 200 degrees C and start to move viscously at higher temperatures, up to more than 400 degrees C. The unexpected reappearance of a Peierls mechanism at such a high temperature is proposed to result from the interaction between screw dislocations and solute carbon atoms. (C) 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：15 / 18

页数：4

共 10 条

[1]

Baird J.D., 1971, METALLURGICAL REV, V16, P1, DOI DOI 10.1179/MTLR.1971.16.1.1

[2] DYNAMIC STRAIN AGEING IN MILD STEEL [J].