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JWJ > Volume 32(3); 2014 > Article
Journal of Welding and Joining 2014 June;32(3) :295-302.
Published online June 30, 2014.
doi:https://doi.org/10.5781/JWJ.2014.32.3.81
Mechanical Properties of Cu and Ni Dissimilar Welds by High Welding Speed Using Single-Mode Fiber Laser
Su-Jin Lee*, Jong-Do Kim**,†
*Joining and Welding Research Institute, Osaka University, Osaka 567-0047, Japan
**,†Division of Marine Engineering, Korea Maritime and Ocean University, Busan 606-791, Korea
Correspondence: Jong-Do Kim  Email: jdkim@kmou.ac.kr
  Published online June 30, 2014
ABSTRACT
As the industrial technology has been developed, a dissimilar welding has been received huge attention in various engineering fields. To understand the mechanical properties and possibility of applications of dissimilar metals joining, the laser welding of Cu and Ni dissimilar metals was studied in this paper. Cu and Ni have differences in materials properties, and Cu and Ni make no intermetallic compounds according to typical binary phase of Cu and Ni system. In this study, lap welds of Cu and Ni dissimilar metals using single-mode fiber laser with high welding speed were tried, and mechanical properties of the welds zone were evaluated using a Vickers hardness test and a tensile shear test. To recognize the relation between hardness and tensile shear load, weld fusion zone of interface weld area were observed. And it was confirmed that the ultra-high welding speed could make good weld beads and higher hardness parts had higher tensile shear load under the all conditions.
Keywords: Cu | Ni | Dissimilar welding | Single-mode fiber laser | Hardness | Tensile shear test
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