Microstructure and wear characterization of AA2124/4wt.%B4C nano-composite coating on Ti-6Al-4V alloy using friction surfacing

作     者：I. ESTHER I. DINAHARAN N. MURUGAN I. ESTHER;I. DINAHARAN;N. MURUGAN

作者机构：Department of Mechanical Engineering Anna University Chennai 600025 Tamil Nadu India Department of Robotics and Automation Engineering PSG College of Technology Coimbatore 641004 Tamilnadu India Department of Mechanical Engineering Science University of Johannesburg Auckland Park Kingsway Campus Johannesburg 2006 South Africa 

出 版 物：《Transactions of Nonferrous Metals Society of China》 (中国有色金属学报（英文版）)

年 卷 期：2019年第29卷第6期

页      面：1263-1274页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 080201[工学-机械制造及其自动化] 

基　　金：Department of Science and Technology [DST-WOS-A  No.SR/WOS-A/ET-1093/2015 (G)] for funding the project 

主　　题：aluminum matrix composite titanium friction surfacing coating wear 

摘      要：This work is focused on developing AA2124/4 wt.%B4 C nano-composite coatings on Ti-6 A1-4 V using friction surfacing to improve the wear resistance. The composite was produced using conventional stir casting method and coatings were laid using an indigenously-developed friction surfacing machine. The rotational speed of the mechtrode was varied. The microstructure of the composite coating was observed using conventional and advanced microscopic techniques. The sliding wear behavior was evaluated using a pin-on-disc apparatus. The coating geometry(thickness and width) increased with increased rotational speed. The interface was straight without thick intermetallic layer. Homogenous distribution of nano B4C particles and extremely fine grains was observed in the composite coating. The interfacial bonding between the aluminum matrix and B4C particles was excellent. The composite coating improved the wear resistance of the titanium alloy substrate due to the reduction in effective contact area,lower coefficient of friction and excellent interfacial bonding.