Dry Sliding Wear Behavior of Aluminum 6063 Composites Reinforced with TiB<sub>2</sub> Particles
- 1 School of Mechanical & Industrial Engineering, Ethiopian Institute of Technology-Mekelle, Mekelle University, Mekelle, Ethiopia
- 2 School of Mechanical & Industrial Engineering, Ethiopian Institute of Technology-Mekelle, Mekelle University, Mekelle, Ethiopia
- 3 Department of Automobile Engineering, People's Education Society College of Engineering, Mandya, India
- 4 Department of Mechanical Engineering, The National Institute of Engineering, Mysore, India
Abstract
The influence of titanium diboride (TiB 2 ) loading on the dry sliding wear characteristics of aluminum 6063 matrix alloy-titanium diboride (Al/TiB 2 ) composite materials has been assessed using a pin-on disc wear tester at different loads. The composites with 5 and 10 wt% of fine TiB 2 particles were fabricated using stir casting technique. For comparison, as-cast of the base alloy were made under the same processing applied for Al/TiB 2 composites. The hardness of the composite materials was measured using Brinell hardness tester. Scanning electron microscopy (SEM) was used to analyze the wear surfaces of samples. The results indicate that fine TiB 2 particles markedly improved the wear performance of the aluminum 6063 matrix alloy. The coefficient of friction decreases with increase in the amount of TiB 2 , but this effect was more pronounced in dry sliding. Hardness of composites increased with increasing TiB 2 loading. The wear rates increase with increase in load and dependent upon TiB 2 loading in the base alloy. Among the composites tested, Al/TiB 2 composites containing 10 wt% TiB 2 exhibited superior wear resistance over the base alloy and 5 wt% Al/TiB 2 composites. These observations were correlated in terms of the TiB 2 loading in base alloy which resulted in the variations of the hardness.
- Tjong, S.C. and Lau, K.C. (1999) Sliding Wear of Stainless Steel Matrix Composites Reinforced with TiB2 Particles. Materials Letters, 41, 153-158.
- Xu, J. and Liu, W.J. (2006) Wear Characteristic of in situ Synthetic TiB2 Particulate Reinforced Al Matrix Composite Formed by Laser Cladding. Wear, 260, 486-492.
- Tjong, S.C., Wu, S.Q. and Zhu, H.G. (1999) Wear Behavior of in situ TiB2-Al2O3/Al and TiB2-Al2O3/Al-Cu Composites. Composites Science and Technology, 59, 1341-1347.
- Tee, K.L., Lu, L. and Lai, M.O. (1999) Synthesis of in situ Al-TiB2 Composites Using Stir Cast Route. Composite Structures, 47, 589-593.
- Tjong, S.C. and Lau, K.C. (1999) Properties and Abrasive Wear of TiB2/Al-4%Cu Composites Produced by Hot Isostatic Pressing. Composite Science & Technology, 59, 2005-2013.
- Tee, K.L., Lu, L. and Lai, M.O. (1999) In situ Processing of Al–TiB2 Composite by the Stir-Casting Technique. Journal of Materials Processing Technology, 89-90, 513-519.
- Lu, L., Lai, M.O., Su, Y., Teo, H.L. and Feng, C.F. (2001) In situ TiB2 Reinforced Al Alloy Composites. Scripta Materilia, 45, 1017-1023.
- Mandal, A., Maiti, V., Chakraborty, M. and Murthy, B.S. (2004) Effect of TiB2 Particles on Aging Response of Al–4Cu Alloy. Materials Science and Engineering A, 386, 296-300.
- Ramesh, C.S., Ahamed, A., Channabasappa, B.H. and Keshavamurthy, R. (2010) Development of Al 6063-TiB2 in situ Composites. Materials and Design, 31, 2230-2236.
- Mandal, A., Chakraborty, M. and Murthy, B.S. (2007) Effect of TiB2 Particles on Sliding Wear Behavior of Al-4Cu Alloy. Wear, 262, 160-166.
- Tee, K.L., Lu, L. and Lai, M.O. (2000) Wear Performance of in situ Al-TiB2 Composite. Wear, 240, 59-64.
- Zhao, M., Wu, G., Jiang, L. and Dou, Z. (2006) Friction and Wear Properties of TiB2/Al Composite. Composites Part A, 37, 1916-1921.
- Roy, M., Venkataraman, B., Bhanuprasad, V.V., Mahajan, Y.R. and Sunderrajan, G. (1992) The Effect of Particulate Reinforcement on the Sliding Wear Behavior of Aluminium Matrix Composites. Metallurgical and Materials Transactions A, 23, 1916-1921.
- Kumar S., Subramanya Sarma, V. and Murthy, B.S. (2007) Influence of in situ Formed TiB2 Particles on the Abrasive Wear Behaviour of Al-4Cu Alloy. Material Science and Engineering A, 465, 160-164.