DRY SLIDING WEAR BEHAVIOR OPTIMIZATION OF STIR CAST LM6/ZrO₂ COMPOSITES BY RESPONSE SURFACE METHODOLOGY ANALYSIS

Abstract

LM6 was reinforced with various percentages of ZrO2 particles by using stir casting method. The prepared samples were subjected to tensile and wear test at variable loads by using a pin-on-disc wear tester. The curve fitting technique was used to develop the respective linear, logarithmic, polynomial, power law equations. The wear worn surface and surface roughness of the specimen were studied. Response Surface Methodology (RSM) was used to minimize the number of experimental conditions and develop the mathematical model between the key process parameters namely weight percentage of ZrO2, load and sliding distance. Analysis of Variance technique was applied to check the validity of the developed model. The mathematical model developed for the specific wear rate was predicted at 99% confidence level and some useful conclusions were made.

Mechanical Properties and Metallurgical Characterization of LM25/ZrO2 Composites Fabricated by Stir Casting Method

“…It is observed that the hardness values of the material is directly proportional to the presence of ZrO 2 with the increase in ZrO 2 , the hardness increases. Similar trends have been observed by many other researchers [5,20]. , it can be seen that, ZrO 2 content increases, the ductility of the composite material increases monotonically by significant amounts.…”

“…Metal Matrix Composites (MMCs) have emerged as an important class of materials for structural, wear, thermal, transportation and electrical applications because it offers high strength to weight ratio, high stiffness and good wear resistance [3][4]. The aluminum based metal matrix composites are excellent novel materials for applications in aerospace, automotive and transportation industries [5][6]. The fabrication methods of the aluminum based composites can be categorized into three processes: solid-state methods, semisolid state methods and liquid state method [5][6].…”

“…The aluminum based metal matrix composites are excellent novel materials for applications in aerospace, automotive and transportation industries [5][6]. The fabrication methods of the aluminum based composites can be categorized into three processes: solid-state methods, semisolid state methods and liquid state method [5][6]. The stir casting is a liquid state method of composite fabrication, in which a dispersed phase is mixed with a molten matrix metal by means of mechanical stirring [7][8].…”

Efecto de la cantidad de ZrO 2 sobre las propiedades mecánicas de los compuestos de aluminio reforzados con ZrO 2 producidos por la técnica de infiltración al vacío

“…Therefore, the increase in the ZrO 2 reinforcement ratio in the composite structure led to gradual decrease in the wear losses. Similar results are reported in the studies in the literature (Ramachandra et al, 2015;Karthikeyan and Jinu, 2015a;Karthikeyan and Jinu, 2016;Madhusudhan et al, 2016;Pandiyarajan et al, 2017;Veeresh Kumar et al, 2019). In another study in the literature, it was stated that the oxide formed at the matrix-reinforcing interface plays an important role in reducing both the friction coefficient and the amount of wear (Karthikeyan and Jinu, 2015b).…”

Development and Mechanical Properties Analysis of Aluminum LM14- Mgo Metal Matrix Composite Using FEA

“…The literature review showed that MMCs play a vital role in replacing metals, due to their advanced mechanical and metallurgical properties. A lot of researchers have concentrated on developing new composites such as Al 6061, LM14, LM25 reinforced with various elements such as TiB 2 , SiC, TiC, ZrB 2 , AIN, Si 3 N 4 , Al 2 O 3 and their wear properties were analyzed in earlier studies [4][5][6][7][8][9][10][11][12]. No papers have been found to analyze the effect of MgO on the LM14 base material while subjected to finite element analysis.…”