Microstructure and Mechanical Properties of X80 Pipeline Steel Joints by Friction Stir Welding Under Various Cooling Conditions

doi:10.1007/s40195-019-00940-0

IMR OpenIR

	Microstructure and Mechanical Properties of X80 Pipeline Steel Joints by Friction Stir Welding Under Various Cooling Conditions
	Xie, G. M.1; Duan, R. H.1; Xue, P.2; Ma, Z. Y.2; Liu, H. L.1; Luo, Z. A.1
通讯作者	Xie, G. M.(xiegm@ral.neu.edu.cn)
	2020
发表期刊	ACTA METALLURGICA SINICA-ENGLISH LETTERS
ISSN	1006-7191
卷号	33 期号:1 页码:88-102
摘要	X80 pipeline steel plates were friction stir welded (FSW) under air, water, liquid CO2 + water, and liquid CO2 cooling conditions, producing defect-free welds. The microstructural evolution and mechanical properties of these FSW joints were studied. Coarse granular bainite was observed in the nugget zone (NZ) under air cooling, and lath bainite and lath martensite increased significantly as the cooling medium temperature reduced. In particular, under the liquid CO2 cooling condition, a dual phase structure of lath martensite and fine ferrite appeared in the NZ. Compared to the case under air cooling, a strong shear texture was identified in the NZs under other rapid cooling conditions, because the partial deformation at elevated temperature was retained through higher cooling rates. Under liquid CO2 cooling, the highest transverse tensile strength and elongation of the joint reached 92% and 82% of those of the basal metal (BM), respectively, due to the weak tempering softening. A maximum impact energy of up to 93% of that of the BM was obtained in the NZ under liquid CO2 cooling, which was attributed to the operation of the dual phase of lath martensite and fine ferrite.
关键词	Friction stir welding Pipeline steel Microstructure Mechanical properties Cooling
DOI	10.1007/s40195-019-00940-0
收录类别	SCI
语种	英语
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000512013800008
出版者	CHINESE ACAD SCIENCES, INST METAL RESEARCH
引用统计	被引频次：24[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/137341
专题	中国科学院金属研究所
通讯作者	Xie, G. M.
作者单位	1.Northeastern Univ, State Key Lab Rolling & Automat, Shenyang 110819, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Xie, G. M.,Duan, R. H.,Xue, P.,et al. Microstructure and Mechanical Properties of X80 Pipeline Steel Joints by Friction Stir Welding Under Various Cooling Conditions[J]. ACTA METALLURGICA SINICA-ENGLISH LETTERS,2020,33(1):88-102.
APA	Xie, G. M.,Duan, R. H.,Xue, P.,Ma, Z. Y.,Liu, H. L.,&Luo, Z. A..(2020).Microstructure and Mechanical Properties of X80 Pipeline Steel Joints by Friction Stir Welding Under Various Cooling Conditions.ACTA METALLURGICA SINICA-ENGLISH LETTERS,33(1),88-102.
MLA	Xie, G. M.,et al."Microstructure and Mechanical Properties of X80 Pipeline Steel Joints by Friction Stir Welding Under Various Cooling Conditions".ACTA METALLURGICA SINICA-ENGLISH LETTERS 33.1(2020):88-102.