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《China Surface Engineering》 2013-01
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Effects of WC Particles on the Microstructure and Hardness of FeCoCrNiCu High-entropy Alloy Coating Prepared by Laser Cladding

HUANG Zu-feng1,ZHANG Chong1,TANG Qun-hua1, DAI Pin-qiang1,2,WU Bo1(1.College of Materials Science and Engineering,Fuzhou University,Fuzhou 350108;2.Department of Materials Science and Engineering,College of Fujian University of Technology,Fuzhou 350108)  
FeCoCrNiCu high-entropy alloy coating with WC particles was prepared by the continuous wave CO2 laser.The effects of WC particles on the microstructure and hardness were investigated.Results show that the high entropy alloy coatings with different WC content are all composed of face-centered cubic(FCC) and body-centered cubic(BCC) solid solution phases.With the increase of WC content,BCC phase content increases and FCC phase content decreases.During the process of laser cladding,WC particles dissolved into the FCC and BCC phases,however,the addition of WC does not cause the formation of complex carbide phases.The microstructure of coatings with different WC content is typical dendrite.Element segregation between the dendrite and interdendrite can be effectively inhibited by laser cladding with rapid solidification.The increase of WC content lead to grain refinement and microhardness increasing.
【Fund】: 福建省自然科学基金(2012J01202);; 国家自然科学基金(51171046 50971043);; 福建省高校产学合作重大项目(2010H60001)
【CateGory Index】: TG174.44
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