Kumar T Satish, Thankachan Titus, Shalini S, Čep Robert, Kalita Kanak
Department of Mechanical Engineering, Amrita School of Engineering, Amrita Vishwa Vidyapeetham, Coimbatore, India.
Department of Mechanical Engineering, Karpagam College of Engineering, Coimbatore, India.
Sci Rep. 2023 Nov 16;13(1):20089. doi: 10.1038/s41598-023-47381-5.
Dry sliding wear behaviour of friction stir processed (FSP) AZ31 and AZ31/ZrC particles (5, 10, and 15 vol%) reinforced surface composite was investigated at different sliding speeds and loads. The samples were tested using a pin-on-disc apparatus with EN31 steel as the counter body to determine the role of FSP and ZrC reinforcement on the microstructure, hardness, and wear behaviour of AZ31. Base metal AZ31 alloy exhibits a hardness of 60 HV, whereas the 15 vol% ZrC-reinforced composites had the highest hardness of 108 HV. It was also identified that 15 vol% ZrC-reinforced composites exhibited lowest wear rate and friction coefficient under all testing conditions. Abrasion, delamination, oxidation, material softening, and plastic deformation are the primary wear mechanisms viewed from the wear tracks of the samples. Higher volume fraction of ZrC particles exhibited better wear resistance at all speeds and loads than AZ31 alloy. A wear map has been generated for different material compositions and wear conditions to identify the main wear mechanisms easily.
研究了搅拌摩擦加工（FSP）的AZ31以及AZ31/ZrC颗粒（5%、10%和15%体积分数）增强表面复合材料在不同滑动速度和载荷下的干滑动磨损行为。使用销盘式磨损试验仪，以EN31钢作为对磨体对样品进行测试，以确定搅拌摩擦加工和ZrC增强对AZ31微观结构、硬度和磨损行为的影响。基体金属AZ31合金的硬度为60 HV，而15%体积分数ZrC增强复合材料的硬度最高，为108 HV。还发现，在所有测试条件下，15%体积分数ZrC增强复合材料的磨损率和摩擦系数最低。从样品的磨损轨迹来看，磨损、分层、氧化、材料软化和塑性变形是主要的磨损机制。在所有速度和载荷下，较高体积分数的ZrC颗粒表现出比AZ31合金更好的耐磨性。已针对不同材料成分和磨损条件生成了磨损图，以便轻松识别主要磨损机制。
