The metallurgical bonding and high temperature tensile behaviors of 9Cr-1W steel and 316L steel dissimilar joint by friction stir welding

被引：26
作者：
He, Bin [1 ]
Cui, Lei [1 ]
Wang, Dongpo [1 ]
Liu, Yongchang [1 ,2 ]
Liu, Chenxi [1 ,2 ]
Li, Huijun [1 ]
机构：
[1] Tianjin Univ, Sch Mat Sci & Engn, Tianjin Key Lab Adv Joining Technol, Tianjin 300354, Peoples R China
[2] Tianjin Univ, Sch Mat Sci & Engn, State Key Lab Hydraul Engn Simulat & Safety, Tianjin 300354, Peoples R China
来源：
JOURNAL OF MANUFACTURING PROCESSES | 2019年 / 44卷
基金：
中国国家自然科学基金;
关键词：
Friction stir welding; Dissimilar joint; Reduced activation ferritic/martensitic steel; Austenitic stainless steel; Metallurgical bonding; High temperature tensile behavior; AUSTENITIC STAINLESS-STEEL; MECHANICAL-PROPERTIES; MICROSTRUCTURE EVOLUTION; FLOW VISUALIZATION; STRAIN-RATE; ZONE; DEFORMATION; PARAMETER; ALLOY; F82H;
D O I：
10.1016/j.jmapro.2019.05.033
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Dissimilar welded joints of 9Cr-1W reduced activation ferritic/martensitic (RAFM) steel and 316 L austenitic stainless steel were made by friction stir welding (FSW) with optimized welding parameters. In stir zone (SZ), mechanically mixing and metallurgical bonding of the two materials are observed. A alpha + gamma two-phase microstructure is observed nearby the bonding interface characterized by diffusion of Cr and Ni from 316 L steel side to RAFM steel side during FSW process. The grain size and dislocation density of the SZ 316 L in are critical for high temperature tensile behavior of the joint. Reducing the rotational speed or placing 316 L at AS could enhance the grain refining, but lead to the increase of the dislocation density of SZ 316 L. The tensile properties of the joint at 550 degrees C are 297.5 MPa yield strength, 546.5 MPa ultimate tensile strength and 17.5% elongation.
引用
收藏
页码：241 / 251
页数：11
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