Irradiation-induced segregation at phase boundaries in austenitic stainless steel weld metal

被引：20

作者：

Lin, Xiaodong ^{[1
,2
]}

Peng, Qunjia ^{[1
]}

Han, En-Hou ^{[1
]}

Ke, Wei ^{[1
]}

Sun, Chen ^{[3
]}

Jiao, Zhijie ^{[4
]}

机构：

[1] Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Liaoning, Peoples R China

[2] Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Liaoning, Peoples R China

[3] State Power Investment Corp Res Inst, Beijing 102209, Peoples R China

[4] Univ Michigan, Dept Nucl Engn & Radiol Sci, Ann Arbor, MI 48109 USA

来源：

SCRIPTA MATERIALIA | 2018年 / 149卷

基金：

对外科技合作项目（国际科技项目）;

关键词：

Austenitic steels; Irradiation; Atom probe tomography; Interface diffusion; Segregation; RADIATION-INDUCED SEGREGATION; STRESS-CORROSION CRACKING; INTERGRANULAR CORROSION; SPECIMEN PREPARATION; NEUTRON-IRRADIATION; AISI; 316L; STABILITY; EVOLUTION;

D O I：

10.1016/j.scriptamat.2018.01.033

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Irradiation-induced segregation (RIS) at phase boundaries in austenitic stainless steel weld metal was studied using atom probe tomography. Irradiation induced depletion of Cr and Mn and enrichment of Ni and Si at the delta-ferrite/austenite, delta-ferrite/carbide and austenite/carbide phase boundaries. The vacancy mechanism and the solute-defect binding model were applied to interpret the RIS at the phase boundaries. The concentration gradients of Cr and Ni at the phase boundary regions reduced Cr depletion but promoted Ni segregation, which caused a difference with the RIS at the grain boundary. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：11 / 15

页数：5

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