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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
Corresponding AuthorXie, G. M.(xiegm@ral.neu.edu.cn)
2020
Source PublicationACTA METALLURGICA SINICA-ENGLISH LETTERS
ISSN1006-7191
Volume33Issue:1Pages:88-102
AbstractX80 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.
KeywordFriction stir welding Pipeline steel Microstructure Mechanical properties Cooling
DOI10.1007/s40195-019-00940-0
Indexed BySCI
Language英语
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000512013800008
PublisherCHINESE ACAD SCIENCES, INST METAL RESEARCH
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/137341
Collection中国科学院金属研究所
Corresponding AuthorXie, G. M.
Affiliation1.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
Recommended Citation
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.
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