Dry sliding wear behavior of AA6061 aluminum alloy composites reinforced rice husk ash particulates produced using compocasting

Abstract

This work concentrates on the preparation of AA6061/(0, 2, 4, 6, 8 wt.%) rice husk ash (RHA) aluminum matrix composites (AMCs) using compocasting and investigation of the dry sliding wear behavior by means of pin-on-disc apparatus at room temperature. The microstructures of the composites were studied using scanning electron microscopy and electron back scattered diffraction. The micrographs confirmed successful incorporation of RHA particles into the aluminum matrix. A proper distribution of RHA particles without segregation was achieved. RHA particles refined the grains of the aluminum matrix and improved the wear resistance of the composite. The influence of RHA particulate content and applied load on the worn surface and wear debris was further reported. RHA particles improved the wear resistance of the composites and reduced the damage on the worn surface. The wear mode changed with increase in the content of RHA particles and the applied load.

Microstructural, mechanical and wear characteristics of aluminum matrix composites fabricated by friction stir processing

“…However, in some cases, especially for inclusion of Ni, Ti and their oxides and salts, and Fe as reinforcement particles, some IMCs such as Al 3 The IMCs are formed at the interfaces of the matrix and reinforcements and create a layer on the surface of the second-phase particles. The mismatch in physical and chemical properties of the IMC layer with the matrix and/ or reinforcement can generate some micro-cracks in the layer.…”

“…Stir casting, compo casting and powder metallurgy (PM) are well-known processes for fabricating aluminum matrix composites [2][3][4]. Agglomerations, non-uniform distribution, porosity, interfacial reactions leading to poor matrix-particle bonding are common defects associated with liquid metallurgy processing.…”

Fabrication and dry sliding wear study of Al6061/mussel-shell particulate composites

“…However, at all the studied loads, composites exhibited lower volumetric loss compared to matrix alloy and 6 wt% composites recorded the lowest loss. Improvement in the hardness of composites due to the incorporation of hard ceramic particles is cited as the reason for improved wear resistance [40][41][42]. Figure 9 illustrates the variation of wear rate of matrix alloy and composites with sliding distance at different loads.…”

The effect of solution treatment on aging behavior and mechanical properties of AA2024-TiB2 composite synthesized by semi-solid casting

“…Some of them are the addition of wetting agents [7] and fluxes [8], oxidation [9], preheating [10], and coating [11] of the particles. Another cost-effective method reported for improving wettability is to develop the composite in the semi-solid temperature region of the alloy [4][5][6][12][13][14]. The developed alternative method is called semi-solid metal (SSM) casting/compocasting/stir rheocasting.…”