Variations of the Microstructure and Mechanical Properties for the Thick Plate Cu-Cr-Zr Alloy Friction Stir Welding Joint Along the Thickness Direction

被引：0
|
作者：
Qiu Y. [1 ,2 ]
Fan Z. [3 ]
Huang C. [3 ]
Li B. [1 ,2 ]
Tang Z. [1 ,2 ]
机构：
[1] Key Laboratory of Advanced Welding Technology, Xiaogan
[2] Hubei Sanjiang Aerospace Hongyang Electromechanical Co., Ltd, Xiaogan
[3] National Defense Key Discipline Laboratory of Light Alloy Processing Science and Technology, Nanchang Hangkong University, Nanchang
来源：
Cailiao Daobao/Materials Reports | 2020年 / 34卷 / 05期
关键词：
Cu-Cr-Zr alloy; Mechanical property; Microstructure; The thickness direction; Thick plate friction stir welding;
D O I：
10.11896/cldb.19050063
中图分类号：
学科分类号：
摘要：
In this experiment, Cu-Cr-Zr alloy with a thickness of 15 mm was welded by friction stir welding (FSW). The joint with good external forming and no internal defects was obtained, and the difference of microstructures and mechanical properties of the weld were analyzed along the thickness direction. The results showed that: the microstructures of the NZ were the fine equiaxed grain, and the grain size varied little along the thickness direction. The microstructures of TMAZ were elongated by the shear force, the discrepancy of grain size along the thickness direction was larger, showed a trend of decreasing from top to bottom. The hardness distribution of the top and middle of the weld cross-section was "W" type, and the hardness distribution of the bottom was "U" type. The hardness of NZ has little difference in the thickness direction, and the diffe-rence in TMAZ of advancing side weld was the largest, which has reached 45HV, the hardness of the weld increased from top to bottom. The tensile strength of the weld increased gradually from top to bottom, while the elongation changed in the opposite direction, and the tensile strength at the bottom of the weld was up to 303 MPa, which was 80% of the base metal. © 2020, Materials Review Magazine. All right reserved.
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页码：10162 / 10165
页数：3
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