Investigation of the thermo-mechanical behavior of neutron-irradiated Fe-Cr alloys by self-consistent plasticity theory

被引：37

作者：

Xiao, Xiazi ^{[1
,2
]}

Terentyev, Dmitry ^{[3
]}

Yu, Long ^{[1
]}

Bakaev, A. ^{[3
]}

Jin, Zhaohui ^{[4
]}

Duan, Huiling ^{[1
,2
]}

机构：

[1] Peking Univ, Dept Mech & Engn Sci, Coll Engn, State Key Lab Turbulence & Complex Syst, Beijing 100871, Peoples R China

[2] Peking Univ, BIC ESAT, CAPT HEDPS & IFSA Collaborat Innovat Ctr MoE, Beijing 100871, Peoples R China

[3] CEN SCK, Inst Nucl Mat Sci, Struct Mat Grp, B-2400 Mol, Belgium

[4] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Shanghai 200240, Peoples R China

来源：

JOURNAL OF NUCLEAR MATERIALS | 2016年 / 477卷

基金：

中国国家自然科学基金;

关键词：

Iron alloys; Irradiation effect; Defects; Continuum mechanics model; Mechanical behavior; POSITRON-ANNIHILATION SPECTROSCOPY; TEM IN-SITU; EDGE DISLOCATION; FERRITIC/MARTENSITIC STEELS; BCC IRON; LOCALIZED DEFORMATION; MECHANICAL-PROPERTIES; TENSILE PROPERTIES; SCREW DISLOCATION; VACANCY CLUSTERS;

D O I：

10.1016/j.jnucmat.2016.05.012

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The thermo-mechanical behavior of non-irradiated (at 223 K, 302 K and 573 K) and neutron irradiated (at 573 K) Fe-2.5Cr, Fe-5Cr and Fe-9Cr alloys is studied by a self-consistent plasticity theory, which consists of constitutive equations describing the contribution of radiation defects at grain level, and the elastic-viscoplastic self-consistent method to obtain polycrystalline behaviors. Attention is paid to two types of radiation-induced defects: interstitial dislocation loops and solute rich clusters, which are believed to be the main sources of hardening in Fe-Cr alloys at medium irradiation doses. Both the hardening mechanism and microstructural evolution are investigated by using available experimental data on microstructures, and implementing hardening rules derived from atomistic data. Good agreement with experimental data is achieved for both the yield stress and strain hardening of non-irradiated and irradiated Fe-Cr alloys by treating dislocation loops as strong thermally activated obstacles and solute rich clusters as weak shearable ones. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：123 / 133

页数：11