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J Weld Join. 2014;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
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Su-Jin Lee*, Jong-Do Kim**,†
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- Corresponding author: Jong-Do Kim ,Email: jdkim@kmou.ac.kr
- 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