Effect of tool diameter ratio of tapered cylindrical profile pin on wear characteristics of friction stir processing of Al-Si alloy reinforced with SiC ceramic particles

Abstract

Friction stir processing is demonstrated to effectively enhance the surface and bulk properties of aluminum composites fabricated via the stir casting route. This process is performed below the melting point of the base material wherein common conventional fabrication problems such as solidification, liquidation cracking, and porosity are eliminated to a significant extent. Five different tools with varying tool diameter ratios are experimented on while maintaining tool rotational and traverse speeds and axial force constant. In this investigation, the hardness and wear characteristics of the LM25 aluminum alloy reinforced with 5% silicon carbide particles composite is studied. It is concluded that the tool with a tool diameter ratio of 3.0 resulted in a defect-free processing zone, refined grains, and a minimum particle size enhancing the wear resistance and hardness as compared to that for other values of a tool diameter ratio.

Optimization of squeeze casting process parameters on mechanical properties of SiCp reinforced LM25 composites through Taguchi technique

“…In the liquid state process, spray deposition, squeeze, and stir casting fabrication techniques are commonly utilised to produce MMCs.The fabrication methods of metal matrix composites play a very important role in the enhancement of mechanical properties. In conventional fabrication methods, problems such as poor wettability, uneven dispersion of particles, and porosity have been degrading the performance of MMCs [18][19][20][21][22]. Therefore, to avoid such issues and to attain homogeneous dispersion in the fabricated MMCs, squeeze casting technique can be preferred in this research.…”

Study on Friction and Wear Properties and Mechanism at Different Temperatures of Friction Stir Lap Welding Joint of SiCp/ZL101 and ZL101

“…For example, Vijayavel et al [28] used FSP to process the surface of the lm25 composite material with a volume fraction of 5% SiC. The experimental results showed that when the shaft-to-shoulder ratio of the stirring pin was 3.0, the obtained equiaxed grains were finer [29] and the microstructures processed at a tool traverse speed of 40 mm/min showed excellent wear resistance. Mohamadigangaraj et al [30] evaluated the effects of friction stir processing parameters on the properties of A390-10 wt% SiC composite using response surface methodology, and the results showed that the speed of rotation had a higher impact on hardness than other parameters.…”