Additive manufacturing of an aluminum matrix composite reinforced with nanocrystalline high-entropy alloy particles

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• 作者：G.M. Karthik^a ; Santhanu Panikar^b ; G.D. Janaki Ram^a ; ^{jram@iitm.ac.in" class="auth_mail" title="E-mail the corresponding author} ; Ravi Sankar Kottada^a
• 关键词：Additive manufacturing ; Friction deposition ; Metal matrix composite ; High-entropy alloy
• 刊名：Materials Science & Engineering A
• 出版年：2017
• 出版时间：2 January 2017
• 年：2017
• 卷：679
• 期：Complete
• 页码：193-203
• 全文大小：3314 K

文摘

In the present work, a metal-metal composite consisting of aluminum-magnesium alloy AA5083 matrix and nanocrystalline CoCrFeNi high-entropy alloy reinforcement particles in 12 vol% was successfully friction deposited in multiple layers. The layer interfaces or the reinforcement/matrix interfaces showed no brittle intermetallic formation – thanks to the inert nature as well as the high strength and hardness of the high-entropy alloy reinforcement particles. The composite showed significantly higher tensile and compressive strengths as compared to standard wrought-processed alloy AA5083-H112 and offered a much better combination of strength and ductility when compared to conventional aluminum matrix composites reinforced with ceramic particles. The current study establishes friction deposition as a viable technique for additive manufacturing of novel high-performance composite materials.