Influences of Ytterbium on Microstructure and Properties of BAg30 Filler Metals and Brazed Joints

doi:10.12442/j.issn.1002-185X.E20210532

Home > Archive>Volume 51, Issue 7, 2022 >2344-2348. DOI:10.12442/j.issn.1002-185X.E20210532

Influences of Ytterbium on Microstructure and Properties of BAg30 Filler Metals and Brazed Joints
DOI:
                        10.12442/j.issn.1002-185X.E20210532
                    
Author:
                        Zhang Liang1,2Zhang Liang
Zhengzhou Research Institute of Mechanical Engineering Co., Ltd, Zhengzhou 450001, China;School of Mechatronic Engineering, Jiangsu Normal University, Xuzhou 221116, China
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Zhong Sujuan1Zhong Sujuan
Zhengzhou Research Institute of Mechanical Engineering Co., Ltd, Zhengzhou 450001, China
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Dong Hongwei1Dong Hongwei
Zhengzhou Research Institute of Mechanical Engineering Co., Ltd, Zhengzhou 450001, China
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Wang Meng1Wang Meng
Zhengzhou Research Institute of Mechanical Engineering Co., Ltd, Zhengzhou 450001, China
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Long Weimin1Long Weimin
Zhengzhou Research Institute of Mechanical Engineering Co., Ltd, Zhengzhou 450001, China
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Affiliation:1.Zhengzhou Research Institute of Mechanical Engineering Co., Ltd, Zhengzhou 450001, China;2.School of Mechatronic Engineering, Jiangsu Normal University, Xuzhou 221116, China
Clc Number:
Fund Project:Major State Research Development Program of China (2019YFF0217400); Central Plains Science and Technology Innovation Leading Talents Program (ZYQR20180030)

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Abstract:

The effects of ytterbium (Yb) on the thermal behavior, wettability, and microstructures of Ag30-Cu-Zn-Sn (BAg30) filler metals were investigated. The shear strength and fracture morphology of brazed joints were analyzed to optimize the filler composition. Results reveal that the addition of 1wt% Yb in BAg30 filler metal can significantly decrease the temperature difference between solidus temperature and liquidus temperature, improve the wettability of filler on the steel substrate, and refine the microstructures. However, the excessive addition of Yb (more than 1wt%) can degrade the properties and coarsen the microstructure. According to the shear strength tests, the BAg30-1wt% Yb brazed joint shows obvious superiority in shear strength and fracture morphology: its shear strength is higher than that of the original BAg30 brazed joint, and the fracture mechanism is ductile fracture, presenting the homogeneous and fine dimples.

Key words:filler metal;brazed joint;wettability;shear strength

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[Zhang Liang, Zhong Sujuan, Dong Hongwei, Wang Meng, Long Weimin. Influences of Ytterbium on Microstructure and Properties of BAg30 Filler Metals and Brazed Joints[J]. Rare Metal Materials and Engineering,2022,51(7):2344~2348.]
DOI：10.12442/j. issn.1002-185X. E20210532

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Received:June 22,2021
Revised:August 18,2021
Adopted:September 01,2021
Online: August 03,2022
Published: July 27,2022

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