Founding Research Journal

Founding Research Journal

Investigation of Wear Behavior of A356/SiCnp Nanocomposite in As-cast and Heat-Treated Conditions

Document Type : Original Research Article

Authors
Mohammadreza Shahi Anhar 1
Maryam Salehi 2
Hasan Saghafian 3
Mohammadamin Abolhasani 1
1 B.Sc. student, School of Metallurgy and Materials Engineering, Iran University of Science and Technology, Tehran, Iran
2 Assistant Professor, School of Metallurgy and Materials Engineering, Iran University of Science and Technology, Tehran, Iran.
3 Professor, School of Metallurgy and Materials Engineering, Iran University of Science and Technology, Tehran, Iran.
10.22034/frj.2024.446581.1192
Abstract
he wear behavior of A356 nanocomposite reinforced by 0.5, 1, and 1.5 wt% SiC nanometric ceramic particles in both as-cast and heat-treated conditions were investigated. The microstructure of the Al matrix was studied using optical microscope. Also, the distribution of the SiC nanoparticles was studied using field emission scanning electron microscopy (FESEM). It was observed that the A356 nanocomposite reinforced by 1.5 wt% SiC had the best distribution of the nanoparticles, and thus, this sample was chosen for the evaluation of wear behavior in both as-cast and heat-treated conditions. The wear test of pin on disk carried out according to the ASTM-G99 standard. Dry wear test was carried out with vertical forces of 10 N, 20 N, and 40 N and the slip velocity of 0.1 m/s for a distance of 1000 m. Based on the results obtained from the dry wear test, the weight loss of the the sample containing 1.5 wt% SiC and also, friction coefficient increased with increasing the slip distance and vertical forces. It was also observed that the sample containing 1.5 wt% SiC in the heat-treated condition had a higher wear resistance than the as-cast condition, due to the modification of the eutectic silicon morphology from rod-shape in the as-cast condition to the spherical shape in the heat-treated condition. According to the obtained results, it can be said that the dominant mechanisms during the wear test in the low and high forces were probably the adhesive mechanisms with the formation of the tribological layer.
Keywords
Wear behavior
Al matrix
nanocomposite
Silicon carbide
Heat treatment
Subjects
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Founding Research Journal
Volume 8, Issue 1 - Serial Number 24
Spring and Summer
Summer 2024
Pages 17-26

  • Receive Date 02 March 2024
  • Revise Date 21 June 2024
  • Accept Date 30 May 2024