(1. 沈陽工業(yè)大學(xué) 材料科學(xué)與工程學(xué)院，沈陽 110870；
2. 沈陽鼓風機集團 核電泵業(yè)有限公司，沈陽 110869)
摘 要: 采用Nd:YAG激光輻照法在Cu單元素基合金表面制備FeCoCrAlCu高熵合金化涂層。利用掃描電鏡、能譜儀、X射線衍射儀、顯微硬度計及納米壓痕儀等研究FeCoCrAlCu激光高熵合金化層形成機制及性能。結(jié)果表明：采用優(yōu)化的激光輻照工藝參數(shù)對等摩爾比的Fe、Co、Cr、Al四元合金粉末進行激光輻照合金化，可制備出含有基體主元Cu的FeCoCrAlCu高熵合金化涂層。合金化涂層由FCC+BCC簡單結(jié)構(gòu)固溶體組成，其顯微組織主要以顆粒狀組織為主，且與基體呈良好的冶金結(jié)合。FeCoCrAlCu激光高熵合金化層的硬度是基體材料的7倍以上，其彈性模量、彈性比和同樣深度承受的最大載荷遠高于基體材料的，具有良好的強度和韌性。
關(guān)鍵字: FeCoCrAlCu；Cu單元素基合金；激光高熵合金化；固溶體；納米硬度
（1.School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, China;
2. Nuclear Power Pump Industry Co., Ltd., Shenyang Blower Works Group Corporation, Shenyang 110869, China）
Abstract:FeCoCrAlCu high entropy alloying coating was synthesized by Nd:YAG laser irradiation method on Cu single-element base alloy. Formation mechanism and properties of FeCoCrAlCu laser high entropy alloying layer were investigated using SEM, EDS, XRD, microhardness tester and nanoindentation tester. The results show that FeCoCrAlCu high entropy alloying coating can be synthesized on the surface of Cu single-element base alloy using equal molar ratio of Fe, Co, Cr, Al quaternary alloy powders by laser irradiation alloying with optimized processing parameters. The alloying coating is composed of FCC+BCC simple structural solid solutions, and the microstructure is mainly granuliform. A good metallurgical bonding between the layer and the substrate can be achieved. The microhardness of FeCoCrAlCu layer is 7 times higher than that of the substrate, and the elastic modulus, elasticity ratio and the maximum load subjected at the same depth of the layer are higher than those of Cu substrate, indicating that the alloying coating has good strength and toughness.
Key words: FeCoCrAlCu; Cu single-element base alloy; laser high entropy alloying; solid solution; nanoindentation
