Influence of Aging Treatment on the Microstructure Evolution and Mechanical Properties of 316H Weld Metals with Different C Contents

doi:10.2355/isijinternational.ISIJINT-2020-387

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	Influence of Aging Treatment on the Microstructure Evolution and Mechanical Properties of 316H Weld Metals with Different C Contents
	Wei, Shitong 1; Zhao, Langlang 2,3; Wu, Dong 3; Gao, Dianbao 4; Lu, Shanping 3
刊名	ISIJ INTERNATIONAL
	2021
卷号	61 期号:3 页码:911-918
关键词	weld metal aging treatment delta-ferrite M23C6 sigma phase mechanical property
ISSN号	0915-1559
DOI	10.2355/isijinternational.ISIJINT-2020-387
通讯作者	Lu, Shanping(shplu@imr.ac.cn)
英文摘要	The 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.
资助项目	Opening 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研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	IRON STEEL INST JAPAN KEIDANREN KAIKAN
WOS记录号	WOS:000635252400029
资助机构	Opening Foundation of Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Sciences ; China Institute of Atomic Energy
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/162214]
专题	金属研究所_中国科学院金属研究所
通讯作者	Lu, Shanping
作者单位	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.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
推荐引用方式 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.