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Influence of Aging Treatment on the Microstructure Evolution and Mechanical Properties of 316H Weld Metals with Different C Contents
Wei, Shitong1; Zhao, Langlang2,3; Wu, Dong3; Gao, Dianbao4; Lu, Shanping3
Corresponding AuthorLu, Shanping(shplu@imr.ac.cn)
2021
Source PublicationISIJ INTERNATIONAL
ISSN0915-1559
Volume61Issue:3Pages:911-918
AbstractThe influence of 600 degrees C aging treatment on the microstructure and mechanical properties of 316H stainless steel weld metals with different C contents have been studied. The results indicated that during the aging process, the rapid precipitation of M23C6 carbide occurred in delta-ferrite firstly owing to the high diffusion rate of C. After the C is depleted by precipitation of M23C6, the residual 5-ferrite transforms into sigma phase through eutectoid transformation (delta-ferrite -> sigma phase + gamma). Furthermore, after a long enough aging time, the transformation from M23C6 to sigma phase occurred. The C content has a significant influence on the delta-ferrite transformation behavior, delta-ferrite in the low and medium C weld metals transforms into M23C6 and sigma phase successively, while delta-ferrite in high C weld metal only transforms into M23C6 carbides. The variations of mechanical properties with aging conditions depended mainly on the microstructures at different aging conditions. For the low C weld metal, as the aging time increased, the increasing sigma phase content improved the strength obviously. For the medium and high C weld metals, as the aging time increased, first the depletion of the solid solution C as a result the M23C6 precipitation deteriorated the strength, then the formation of sigma phase improved the strength. Furthermore, with the increasing of the aging time, the precipitation of M23C6 and a phase deteriorated the elongation and impact energy.
Keywordweld metal aging treatment delta-ferrite M23C6 sigma phase mechanical property
Funding OrganizationOpening Foundation of Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Sciences ; China Institute of Atomic Energy
DOI10.2355/isijinternational.ISIJINT-2020-387
Indexed BySCI
Language英语
Funding ProjectOpening Foundation of Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Sciences[2019NMSAKF04] ; China Institute of Atomic Energy[2016-DGB-I-KYSC-0024]
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000635252400029
PublisherIRON STEEL INST JAPAN KEIDANREN KAIKAN
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/162215
Collection中国科学院金属研究所
Corresponding AuthorLu, Shanping
Affiliation1.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.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
4.China First Heavy Ind, Nucl Power & Petrochem Business Grp, Dalian 116113, Peoples R China
Recommended Citation
GB/T 7714
Wei, Shitong,Zhao, Langlang,Wu, Dong,et al. Influence of Aging Treatment on the Microstructure Evolution and Mechanical Properties of 316H Weld Metals with Different C Contents[J]. ISIJ INTERNATIONAL,2021,61(3):911-918.
APA Wei, Shitong,Zhao, Langlang,Wu, Dong,Gao, Dianbao,&Lu, Shanping.(2021).Influence of Aging Treatment on the Microstructure Evolution and Mechanical Properties of 316H Weld Metals with Different C Contents.ISIJ INTERNATIONAL,61(3),911-918.
MLA Wei, Shitong,et al."Influence of Aging Treatment on the Microstructure Evolution and Mechanical Properties of 316H Weld Metals with Different C Contents".ISIJ INTERNATIONAL 61.3(2021):911-918.
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