Mechanical and wear behavior of LM25 Aluminium matrix hybrid composite reinforced with Boron carbide, Graphite and Iron oxide

作     者：V. Suresh P. Vikram R. Palanivel R.F. Laubscher 

作者机构：Department of Mechanical Engineering Holy Mary Institute of Technology and Science Hyderabad Telangana 501 301 India Department of Mechanical Engineering Science University of Johannesburg Auckland Park Kingsway Campus Johannesburg 2006 South Africa 

出 版 物：《Materials Today: Proceedings》 

年 卷 期：2018年第5卷第14期

页      面：27852-27860页

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

主　　题：Metal matrix composites aluminium alloy LM25 tensile strength B 4 C Gr Fe 3 O 4 SEM stir casting micro-structure hardness wear density porosity 

摘      要：The wear behaviors of selected Aluminium (LM25) based hybrid composites manufactured by stir casting are evaluated in this study. The reinforcement particles include boron carbide (B 4 C), graphite (Gr) and iron oxide (Fe 3 O 4 ).The tribological and mechanical properties of these composite materials were investigated. A microstructural investigation of this composite shows a uniform distribution of reinforcing particles in the matrix. Wear experiments were conducted by a pin-on-disc technique. Load, sliding velocity, and sliding distance were varied. Each were varied for at least three levels i.e. load10,20,30 and 40 N, ; velocity 2, 4 and 6 m/s and distance 1000, 2000 and 3000 m to investigate the wear behavior of the composite. The results indicate that with an increase in the reinforcement content, the wear loss reduced monotonically and that both the hardness and ultimate tensile strength increases. Worn surfaces of the composite specimen were analyzed by SEM for predicting the wear mechanism. This study revealed that the addition of reinforcement significantly improves the wear resistance of aluminium composites. These results show that hybrid aluminium composites should be considered as an excellent materials where high strength, ultimate tensile strength and wear-resistant are of primary importance specifically in the aerospace and automotive engineering sectors