Empirical Model for Dry Sliding Wear Behaviour of Centrifugally Cast Functionally Graded Al/SiC_p Composite

Abstract

Horizontal centrifugal casting machine was adopted to fabricate tubes of functionally graded materials (FGM) made of commercially pure aluminum reinforced with different weight fractions of SiC particles. Tubes with 2.5, 5 and 10%wt. SiCpwere produced in the speed range 800 to 1100 rpm. Wear experiments involving dry sliding under different loading conditions were conducted on samples taken from three consecutive layers across the wall of the FGM tubes. Analysis of variance (ANOVA) was used to determine the significant FGM production parameters and wear test parameters (normal load and test duration) affecting the wear resistance of the samples. Obtained wear test results have been used to build a regression model to predict the expected weight loss across the wall thickness of the tube depending on the production parameters and the loading conditions.

Functionally graded materials classifications and development trends from industrial point of view

“…It is clear that most research work focused on experimental mechanical characterization (esp. tensile and hardness) [33], wear rate prediction [34] or thermal properties evaluation [35]. Very few research groups are considering numerical simulation of FGMs.…”

Microstructural, mechanical and tribological characterization on the Al based functionally graded material fabricated powder metallurgy

“…The most prominent material property in industrial and commercial application of functionally graded material (FGM) is the density, in order to assess it ,we have tested on computerized density apparatus [16] which works on the principle of Archimedes rule of weight variation in air and liquid medium. It evaluates the specimen and gives the density in dimensionless parameter named as relative density.…”

“…Powder methodology is mainly used in FGM fabrication to obtain the finest internal structure, at the same time, the entire process of FGM fabrication is not only conducted by Powder methodology, in which, anyone of the fabrication methods like conventional sintering, stir casting, infiltration method, plasma spraying method, spark plasma sintering (SPS) has also been considered. In the fabrication of aluminum-based FGM, the sintering process is mostly used because of its easy and simple working procedure [16,17]. Before performing the sintering process, the thermomechanical characteristics and particle size of base materials and reinforcement must be analyzed, because, those can be created the crack and stress.…”

Microstructure and Corrosion Behavior of Functionally Graded Wire Arc Additive Manufactured Steel Combinations

“…[1,2] They are characterized by desired gradients such as chemical composition and microstructure to adjust specific local properties such as strength, hardness, corrosion behavior, wear resistance, high-temperature stability, and weight reduction. [3,4] FGM are divided in two different types of gradients (continuously or stepwise graded). [5] The continuous process allows the production of steadily changing microstructures, compositions, and properties, while the stepwise procedure can be used to create multilayered components with different microstructures and properties separated by a defined interface.…”