ss/Zr(Cr,Mn)2/Zr2(Co,Cu,Ni,Fe)+Zr2(Ag,Cu)+Zr(Cr,Mn)2/Zr. The joints have the maximum shear strength of 103.1 MPa. As the brazing temperature or holding time rises, the thickness of Cr-rich solid solution and Zr(Cr,Mn)2 layer are increased, the content of Zr2(Co,Cu,Ni,Fe) and Zr(Cr,Mn)2 phase is increased whereas the content of Zr2(Ag,Cu) phase is decreased. Finally, the failure mechanism of the joint was analyzed. Under the action of shear force, as the brazing temperature or holding time rises, the fracture position of the joint shifts from the Zr(Cr, Mn)2 layer to the Zr2(Co, Cu, Ni, Fe) phase fracture in the center of the brazing seam."/>

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Interfacial Microstructure and Mechanical Properties of Zr/CoCrFeMnNi HEA Brazed Joints
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1.State Key Laboratory of Precision Welding Joining of Materials and Structures, Harbin Institute of Technology, Harbin 150001, China;2.Provincial Key Laboratory of Special Welding Technology, Harbin Institute of Technology, Weihai 264209, China;3.State Key Laboratory of Advanced Brazing Filler Metals and Technology, Zhengzhou Research Institute of Mechanical Engineering Co., Ltd, Zhengzhou 450001, China

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TG454

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    Abstract:

    AgCu filler was used to braze Zr and CoCrFeMnNi high-entropy alloy (HEA). The effects of brazing temperature and holding time on the microstructure and mechanical properties of the joints were analyzed. The results show that the typical microstructure of the joints brazed at 850 ℃ for 10 min is HEA/Crss/Zr(Cr,Mn)2/Zr2(Co,Cu,Ni,Fe)+Zr2(Ag,Cu)+Zr(Cr,Mn)2/Zr. The joints have the maximum shear strength of 103.1 MPa. As the brazing temperature or holding time rises, the thickness of Cr-rich solid solution and Zr(Cr,Mn)2 layer are increased, the content of Zr2(Co,Cu,Ni,Fe) and Zr(Cr,Mn)2 phase is increased whereas the content of Zr2(Ag,Cu) phase is decreased. Finally, the failure mechanism of the joint was analyzed. Under the action of shear force, as the brazing temperature or holding time rises, the fracture position of the joint shifts from the Zr(Cr, Mn)2 layer to the Zr2(Co, Cu, Ni, Fe) phase fracture in the center of the brazing seam.

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[Du Peng, Song Xiaoguo, Long Weimin, Bian Hong, Qin Jian, Sun Huawei, Jiang Nan. Interfacial Microstructure and Mechanical Properties of Zr/CoCrFeMnNi HEA Brazed Joints[J]. Rare Metal Materials and Engineering,2025,54(2):385~393.]
DOI：10.12442/j. issn.1002-185X.20240591

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History
  • Received:September 11,2024
  • Revised:December 11,2024
  • Adopted:December 11,2024
  • Online: February 25,2025
  • Published: February 20,2025