DRY SLIDING WEAR BEHAVIOR OF NANO and MICRON PARTICLES REINFORCED P/M BASED METAL MATRIX COMPOSITES | ||||
| The International Conference on Applied Mechanics and Mechanical Engineering | ||||
| Article 147, Volume 13, 13th International Conference on Applied Mechanics and Mechanical Engineering., May 2008, Page 89-101 PDF (2.01 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/amme.2008.39835 | ||||
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| Authors | ||||
| VENKATESWARAN K.; M. KAMARAJ M.; PRASAD RAO K. | ||||
| Department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras, Chennai 600 036, India. | ||||
| Abstract | ||||
| ABSTRACT Powder Metallurgy (P/M) based Metal Matrix Composites (MMCs) has emerged as a class of materials capable of advanced structural, aerospace and automotive applications in recent years. In spite of various process and property advantages, they have one major disadvantage namely poor wear resistance. This restricts the use of these MMCs, for wear resistant applications. Use of reinforcement of ceramic hard particles namely SiC and Al2O3 , to improve wear properties in MMCs are common in spite of its high cost and poor compatibility with base metal matrix. Recently, interest in use of intermetallic particles in MMCs for tribological applications has grown significantly. The principal advantage of intermetallic composites is the metal-like properties of the matrix. Also, they are attractive in tribological applications not only for their intrinsic properties such as hardness, stability, wear resistance etc. but also because of their compatibility with metallic matrices. Hence, the present investigation aims at studying the influence of mechanically alloyed nano iron aluminide intermetallic particles and micron alumina ceramic particles on the wear behavior of P/M based SS316L metal matrix composites were studied using a pin-on-disk wear testing machine under dry sliding condition. Both, iron aluminide and alumina were used as particle reinforcement with 10 and 20 % volume in the matrix. The composites were prepared by mixing and cold compacting followed by sintering SS316L at 1250°C. The presence and distribution of Fe3Al and Al2O3 phases on the matrix were identified. The experimental results indicated improvement in dry sliding wear properties of MMCs compared to their plain alloys. It also revealed that unreinforced SS316L showed lower wear resistance, while the composites with Fe3Al were found superior during longer sliding conditions. Alumina reinforced SS316L based MMCs impart good wear resistance only, for shorter sliding distances and the beneficial effects of Al2O3 tend to decrease as the sliding distance increases. Wear tracks were characterized by SEM techniques to identify the possible wear mechanisms for the composites studied. | ||||
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