压缩量对单晶铜冷压焊接接头组织及性能的影响

doi:10.11896/cldb.19040088

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Abstract Single crystal copper was connected using cold pressure welding and the influence of compression on the joint microstructure and properties were studied in order to achieve effective connection and not lose the conductivity of single crystal high purity copper as possible. The results showed that an effective joint could not be formed during the cold pressure welding joint connection of single crystal copper when the compression was small. Only when the amount of compression reached a critical value, an effective joint could be formed. In the axial direction of joint, the base material region and the deformation region still maintained a single crystal structure, but their grain orientations changed. With the increase of deformation, the single crystal structure at the joint interface was destroyed and the fine recrystallized grains at the joint increased and then decreased. It consisted of a large number of fine grains with different orientations and a deformation band structure. The grain size at the interface was gradually reduced, and the tensile strength of joint was increased and then slightly decreased. The cold pressure welding joints kept good electrical conductivity.

Key words： single crystal copper cold pressure welding recrystallization conductivity tensile strength

Published: 29 May 2020

CLC number:

TG453.4

About author:: Yong Huang, Ph.D. in Engineering, Professor. Faculty member, Department of Welding Technology and Engineering, School of Materials Science and Enginee-ring. In scientific research, he is mainly engaged in research on joining of functional materials, active welding methods and their theories and welding physics et al. He applied for and obtained 7 national invention patents, published more than 90 papers, and searched more than 70 articles in three major indexes.

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	HUANG Yong
	RAN Xiaolong
	YAN Xiaojuan

Cite this article:

HUANG Yong,RAN Xiaolong,YAN Xiaojuan. Effect of Compression on Microstructure and Properties of Single Crystal Copper Cold Pressure Welding Joints[J]. Materials Reports, 2020, 34(12): 12110-12114.

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http://www.mater-rep.com/EN/10.11896/cldb.19040088 OR http://www.mater-rep.com/EN/Y2020/V34/I12/12110

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