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

页码：241 / 251

页数：11