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Study the Effect of Grain Refinement and Modification on | ||
| Iraqi journal of mechanical and material engineering | ||
| Article 1, Volume 0, Issue 0, 2010, Pages 687-697 | ||
| Authors | ||
| Dr. Najem Abdul Ameer; Eng. Talib Abdul Ameer Jasim | ||
| Abstract | ||
| The present study deals with an investigation of dry sliding wear behaviour of grain refined and or modified (Al–20Si) alloy by using a Pin-On-Disc. The refining was by grain refinements (Ti and B), modification (Sr, Na and P) and combined action of both (Ti, B + P +chilling). Results indicate that combined grain refined and modified Al-20Si alloys have microstructures consisting of uniformly distributed α-Al grains, eutectic Al–silicon and fine primary Si - particles in the interdendritic region. These alloys (5, 6) exhibited better wear resistance (13-15 times) than the same alloy subjected to only grain refinement or modification (1, 2 and 3) . The improved wear tances are related to the refinement of the aluminum grain size, uniform distribution of fine fibrous eutectic Al–silicon and fine primary Si- particles. | ||
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