Corrosion of phase and phase boundary in proton-irradiated 308L stainless steel weld metal in simulated PWR primary water

被引：45

作者：

Lin, Xiaodong ^{[1
,2
]}

Peng, Qunjia ^{[1
,3
]}

Mei, Jinna ^{[3
]}

Han, En-Hou ^{[1
]}

Ke, Wei ^{[1
]}

Qiao, Lijie ^{[4
]}

Jiao, Zhijie ^{[5
]}

机构：

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

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

[3] Suzhou Nucl Power Res Inst, Suzhou 215004, Peoples R China

[4] Univ Sci & Technol Beijing, Beijing Adv Innovat Ctr Mat Genet Engn, Beijing 100083, Peoples R China

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

来源：

CORROSION SCIENCE | 2020年 / 165卷

基金：

中国国家自然科学基金;

关键词：

Stainless steel; TEM; Welding; High temperature corrosion; RADIATION-INDUCED SEGREGATION; HEAVY-ION IRRADIATION; NICKEL-BASE ALLOYS; HIGH-TEMPERATURE; OXIDE-FILM; IN-SITU; MICROSTRUCTURAL EVOLUTION; INDUCED PRECIPITATION; SPECIMEN PREPARATION; NEUTRON-IRRADIATION;

D O I：

10.1016/j.corsci.2019.108401

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The corrosion of austenite and delta-ferrite phases and the respective phase boundary was investigated in unirradiated and proton-irradiated 308 L stainless steel weld metal in a simulated-PWR environment. The results revealed that the inner oxide thickness was increased by irradiation for austenite but was largely unaffected for delta-ferrite. This behavior was attributed to the fact that irradiation generated numerous structure defects in austenite, but not in delta-ferrite. Following the 3-dpa (displacements per atom) irradiation, enhanced corrosion of delta-ferrite/austenite phase boundary occurred due to the irradiation-induced Cr-depletion. M23C6 carbides along the phase boundary further enhanced corrosion regardless of the irradiation condition.

引用

页数：18

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