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3. Experimental Investigation on Metallurgical and Mechanical Properties and Wear Behavior of Al5032/SiC Nanocomposites

Author

Abraar, S. A. Muhammed, Rajhu, N. Mohan, Vardhan, T. Vishnu, Agrawal, Abhishek, Saxena, Kuldeep K., Savithiri, V., Buddhi, Dharam, Senthilvel, K., and Ramesh, B.

Subjects
Aluminium alloy 5032, Wear resistance, Nanocomposite, Stir casting, Pin on disc, Silicon carbide
Abstract

Aluminium metal matrix composites are highly dominated composites for various applications such as military, marine, aircraft, aerospace and automobile because of their corrosion resistance, tribological and mechanical properties. In this research, aluminium alloy 5032 composite reinforced with SiCnp (4, 8, 12 and 16 wt.%) was manufactured using stir casting method and subjected to various mechanical, metallurgical and wear tests. The novelty of this research lies in the fabrication and characterization of Al5032/SiCnp composites, which has been not done before. The Energy Dispersive X ray analysis (EDAX) was used to examine the presence of SiC in Al5032 matrix and Scanning Electron Microscope (SEM) was employed to examine the microstructure of the composite. Further micro hardness, wear resistance, tensile and impact tests were carried out. The aforesaid properties increases upto 12 wt.% addition of silicon carbide in Al5032 alloy and thereafter reduces. The nanocomposite Al5032/12wt.%SiC exhibits 98 HV, 256 MPa tensile strength, 19 MPa impact strength and 5 mg wear loss.

Published
2023

6. Microstructure, Mechanical Characteristics, and Wear Performance of Spark Plasma Sintered TiB 2 –Si 3 N 4 as Affected by B 4 N Doping.

Author

Ramesh, Balasubramanian, Showman, Essmat, Abraar, S. A. Muhammed, Saxena, Kuldeep Kumar, Tharwan, Mohammed Y., Alsaadi, Naif, Al Sofyani, Sharaf, and Elsheikh, Ammar H.

Subjects
MICROSTRUCTURE, SPECIFIC gravity, FRACTURE toughness, WEAR resistance, SILICON nitride, HARDNESS
Abstract

This study aims to analyze the effect of boron nitride (B4N) additive (3–6%) on the densification, microstructure, mechanical properties, and wear performance of TiB2–15%Si3N4 and TiB2–30%Si3N4 sintered composites. When the B4N (3%) was added to the TiB2–30Si3N4 composite, the density increased to 99.5%, hardness increased to 25.2 MPa, and the fracture toughness increased to 4.62 MPam1/2. Microstructural analysis shows that in situ phases such as TiB2 help to improve the relative mechanical characteristics. However, raising the B4N additive to 6% in the above-sintered composite reduces the composites' relative density and hardness. The tested sintered composites demonstrated that their superior wear resistance can be attributed to their increased density and hardness. [ABSTRACT FROM AUTHOR]

Published
2022
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