Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/27489
Title: The effect of laser treatment on the mechanical and electrical properties of busbar joints
Authors: Wong, TT
MacAlpine, JMK
An, G
Liang, GY
Keywords: Busbars
Electric conductivity
Laser alloying
Salt spray corrosion
Issue Date: 2004
Publisher: Inderscience Enterprises Ltd
Source: International journal of materials and product technology, 2004, v. 21, no. 6, p. 473-486 How to cite?
Journal: International Journal of Materials and Product Technology 
Abstract: A high proportion of the faults in electrical substations are due to the overheating of busbar joints. Surface contamination due to atmospheric corrosion is a main cause. Laser surface treatments have previously been applied by the authors to improve the surface hardness and corrosion resistance of aluminium alloys. Similarly, a chromium protective coating can be produced on copper by laser-alloying. This should allow more reliable bolt-together busbar joints to be made up on site with less attention to surface cleanliness. In this study experimental investigations were made into the mechanical and electrical properties of laser-treated copper busbar joints under various conditions of applied torque and current flow. It was found that the maximum hardness of the laser-alloyed layer could reach HV95, which is almost 50% higher than that of the original sample. There were insignificant differences between the temperature distribution associated with the laser-alloyed and the untreated samples. The corrosion resistance of the laser-alloyed sample is slightly better than that of the original sample in the salt spray corrosion test. The electric conductivity of the uncorroded laser-alloyed joints was only slightly lower than that of the uncorroded untreated joints.
URI: http://hdl.handle.net/10397/27489
ISSN: 0268-1900
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