Shape Memory Alloy Pipe-Joint with Copper Coating

Abstract:

In order to improve the performance of pipe couplings, a technique has been developed to electroplate copper on the inner surface of Ni-Ti-Nb pipe-joints after pre-deformation. Gas leak tightness and tensile tests were conducted to evaluate the performance of the couplings both with and without copper coating. It was found that electroplating a thin copper layer on the inner surface of the pipe-joint effectively solved the problem of leakage and greatly enhanced the pull-out force of the couplings. Furthermore, the pipe-joints without ribs can be demounted easily after being cooled to the liquid nitrogen temperature and benefit the maintenance of the pipeline.

• Periodical: Materials Science Forum (Volumes 475-479)
• Pages: 1957-1960
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.475-479.1957
• Online since: January 2005
• Authors: Lei Wang, De Sheng Yan, Zhi Min Jiang, Li Jian Rong
• Keywords: Copper Plating, Pipe Coupling, Shape Memory Alloy Actuator, Wide Hysteresis

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