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- 저자 : Santanu Sardar (검색결과 1 건)
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Santanu Sardar,Debdulal Das 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.6
Any engineering surface, even a highly polished one, is prone to abrasion which incurs most of the wear related expenses. Two-body abrasion causes severe material and dimensional losses and is affected by a variety of extrinsic and intrinsic variables. Furthermore, tribo-responses like wear resistance (WR), coefficient of friction (COF) and abraded surface roughness(ASR) are three distinct characteristics in nature, and therefore, multi-objective optimization is necessary for design andselection of engineering systems. In the present article, tribo-performances of stir-cast alumina reinforced Al–Zn–Mg–Cumatrix composites in terms of WR, COF and ASR were evaluated under two-body abrasion with varying abrasive size, loadand sliding distance. Irrespective of abrasion conditions, the developed composites exhibited superior WR ability with substantiallylower COF but much greater ASR than alloy. All three tribo-responses were first converted into a single responseof grey relational grade (GRG); afterwards, response surface based central composite design was adopted to improve triboperformancesof the composites through optimal factor setting by which WR would become the greatest, and COF and ASRwould be the lowest. Abrasive size followed by reinforcement quantity was evaluated as the preeminent one among all thefactors on GRG. The role of different control factors on observed tribo-characteristics was explained via identification ofvarious micro-mechanisms of abrasion.
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