Cyclically induced softening in reduced activation ferritic/martensitic steel before and after neutron irradiation

被引：12

作者：

Kim, S. W. ^{[1
,2
]}

Tanigawa, H. ^{[3
]}

Hirose, T. ^{[3
]}

Kohayama, A. ^{[4
]}

机构：

[1] Kyoto Univ, Grad Sch Energy Sci, Kyoto 6110011, Japan

[2] Japan Atom Energy Agcy, Ibaraki 3111393, Japan

[3] Japan Atom Energy Agcy, Ibaraki 3191195, Japan

[4] Kyoto Univ, Inst Adv Energy, Kyoto 6110011, Japan

来源：

JOURNAL OF NUCLEAR MATERIALS | 2009年 / 386-88卷

关键词：

FATIGUE BEHAVIOR;

D O I：

10.1016/j.jnucmat.2008.12.168

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Low-cycle fatigue results at ambient temperature under diametral strain-controlled conditions of the reduced activation ferritic/martensitic steel, F82H IEA heat before and after neutron irradiated samples are reported. The results show that cyclic softening behavior is the main mechanical feature observed in this material. A detailed analysis for the hysteresis loops was carried out to determine the friction and back stresses. The friction stress is equivalent to the resistance which the dislocations have to overcome to keep moving in the lattice. The back stress depends on the density of long-range impenetrable obstacles that are created by the dislocations movement such as pile-ups. The cyclic softening of F82H IEA heat is related with the decrease of the friction stress. Moreover, the friction and back stress behavior of neutron irradiated samples show significantly different behavior than those of unirradiated samples. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：529 / 532

页数：4

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