Abstract
This paper describes the influence of deformation by equal-channel angular pressing (ECAP) on the solid particle erosion resistance of the AlSi7Mg0.3 alloy and AlSi7Mg0.3 based composite material reinforced with the addition of 4 % of fly ash (FA) particles. Both, alloy and composite samples were produced using the compo-casting method. The samples have been subjected to ECAP in multiple passes with the rotation of samples around the vertical axis for the angle of 90° after each pass. Particles of silicon carbide (SiC) have been used as erodent while their impact angle was varied (30° and 90°). Observed samples of AlSi7Mg0.3 alloy generally showed higher wear resistance at 90° angle where material fatigue predominates, than at a 30° angle where abrasion-related phenomena predominate. On the other hand, AlSi7Mg0.3 based composite material exhibited erosion wear at 30° angle less than at 90° angle after one ECAP pass. Evaluation of the erosion resistance has been made based on mass and volume loss. After two passes of ECAP, the matrix structure of the AlSi7Mg0.3 based composite material, as well as that of the AlSi7Mg0.3 alloy was improved from the aspect of erosion resistance.
Highlights
In the production of composites based on aluminum and its alloys, fly ash (FA)can be used as reinforcement
This paper describes the methods and results of solid particle erosion resistance of the composite based on AlSi7Mg0.3 and 4% of FA and compares them to the AlSi7Mg0.3 alloy
After each pass of equal-channel angular pressing (ECAP) due to the intensive plastic deformation, the dendrite cast structure collapses in both the AlSi7Mg0.3 alloy and AlSi7Mg0.3 based composite reinforced with 4% FA
Summary
Previous studies [5,6,7,8,9,10] have shown that by using FA as a reinforcement in the matrix based on aluminum and its alloys, a composite with lower density with properties same or better than the base material can be obtained. Properties of such composite materials can be further improved by applying a plastic deformation treatment process [11,12,13]. To improve the properties of the material ECAP of individual AlSi7Mg0.3 alloy and AlSi7Mg0.3 based composite samples has been performed and obtained results of erosion resistance tests have been shown and discussed
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