Wear Behavior Of Spray Formed Al–20 Mg 2 Si Alloy

Abstract

In the present study, Al–20Mg2Si alloy has been spray formed and subsequently hot pressed for porosity reduction. The microstructural features, microhardness and wear behavior of spray formed, hot pressed alloys have been evaluated and compared with as cast alloy. In spray deposition process the melt was gas atomized and deposited over a copper substrate. The microstructure of spray deposited alloy showed fine and uniformly distributed primary Mg 2 Si in the Al matrix. In contrast, a coarse polyhedral shaped morphology of the primary Mg2Si phase was observed in the microstructure of the as-cast alloy. The microstructure was refined further after hot consolidation. The wear rate of spray deposited alloy was invariably lower than that of as-cast alloy. The improvement in wear properties of spray deposited alloy was discussed in the light of its micro structural modification, nature of worn surfaces and debris particles generated during wear.