Microstructure-Based Strength Distribution Across the Welds of Nickel-Based Superalloy Inconel 751 and Austenite Steel 21-4N Joined by Inertia Friction Welding

被引：9

作者：

Zhu, Yuanzhi ^{[1
,2
]}

Guo, Yingying ^{[1
]}

Yang, Libin ^{[3
]}

机构：

[1] Wuhan Univ Sci & Technol, Minist Educ, Key Lab Ferrous Met & Resources Utilizat, Wuhan 430081, Peoples R China

[2] N China Univ Technol, Coll Mech Elect & Engn, Beijing 100144, Peoples R China

[3] Beijing Inst Technol, Sch Mech Engn, Zhuhai 519085, Peoples R China

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE | 2013年 / 44卷 / 02期

基金：

中国国家自然科学基金;

关键词：

STRAIN-INDUCED PRECIPITATION; STAINLESS-STEEL; ALLOY; DEFORMATION; KINETICS; BEHAVIOR;

D O I：

10.1007/s11663-013-9795-y

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Welding dissimilar metals is always a challenge for their different physical property and microstructures. In this study, the two dissimilar metals 21-4N and Inconel 751 are welded together by inertia friction welding. Microstructure observation shows that the weld can be divided into three regions in 21-4N: the chemical composition mixture zone, shear zone, and base metal. The width of the chemical composition mixture zone (CMZ) is about 80 mu m, with relatively larger grains and lower dislocation density distributed in this zone. Shear banding occurs in the shear zone, and carbides are found to have precipitated strongly along these shear bands noncontinuously. The base metal contains an austenite microstructure with carbides distributed in the matrix. In Inconel 751, only two typical zones can be observed: the CMZ and the base metal. The heat-affected zone is too small to be observed in the whole weld. Finally, a strength model based on microstructural evolution is proposed. The strength distribution along the axial direction of the welds is calculated. The results are in good agreement with the measurements.

引用

页码：396 / 405

页数：10