Effect of Variation of SiC Reinforcement on Wear Behaviour of AZ91 Alloy Composites
Abstract
:1. Introduction
2. Material and Method
3. Results and Discussion
4. Conclusions
- The microhardness of the SiC reinforced AZ91 composites was more than the unreinforced AZ91 alloy due to the presence of a hard particle in a soft matrix.
- The wear rate and coefficient of friction of the SiC reinforced composites was lower than the unreinforced composites. This is due to the higher hardness and grain refinement in SiCp in composites.
- The wear rate increased with an increase in normal loads due to the increase in plastic deformation at higher load.
- The friction coefficient decreased with an increase in normal load and sliding distance due to a decrease in the mating surfaces’ asperities.
- The wear rate at velocity 1.39 m/s was higher than that at velocity 2.60 m/s in alloy and composites, and the effect of differences in velocity on wear rate decreased with the increase in normal loads. This may be because the effect of load on wear rate is higher than velocity and increase in hardness on addition of SiCp.
- The wear behaviour at velocity 1.39 m/s was dominated by oxidation and delamination wear whereas at velocity 2.6 m/s wear behaviour was dominated by abrasion and adhesion wear due to the induction of high energy at higher velocity and load.
- It was observed from SEM that the plastic deformation and smearing occurred at higher load and sliding velocity due to severe plastic deformation on the surface.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Parameters | Value/Description |
---|---|
Pin Materials | AZ91 and its composite reinforced with SiC (3%, 6%, 9%, and 12%) |
The Dimension of the Pin | 30 mm length and 8 mm in diameter |
Disk Material | Tool steel grade EN31 |
Track diameter (D) | 83 mm for all experiments |
Load Variation (N) | 9.81 N, 19.62 N, 29.43 N, 39.24 N, 49.05 N, 58.86 N (for RPM-320) 19.62 N, 39.24 N, 58.86 N (for RPM-600) |
Sliding Time (t) | 15 min |
Speed Variation (n) | 320 RPM and 600 RPM |
Load | Sliding Speed (m/s) | Pin Material | Wear Mechanism | ||||
---|---|---|---|---|---|---|---|
Abrasion | Oxidation | Delamination | Adhesion | Softening/Melting | |||
19.62 | 1.39 | AZ91 | * | ** | ** | ||
AZ91+3% SiC | * | ** | ** | ||||
AZ91+6% SiC | * | ** | ** | ||||
AZ91+9% SiC | * | ** | ** | ||||
AZ91+12% SiC | * | ** | ** | ||||
19.62 | 2.6 | AZ91 | * | * | ** | * | |
AZ91+3% SiC | * | * | ** | * | |||
AZ91+6% SiC | * | * | ** | * | |||
AZ91+9% SiC | * | * | ** | * | |||
AZ91+12% SiC | * | * | ** | * | |||
39.24 | 1.39 | AZ91 | ** | ** | * | ** | |
AZ91+3% SiC | ** | ** | * | ** | |||
AZ91+6% SiC | ** | ** | * | ** | |||
AZ91+9% SiC | ** | ** | * | ** | |||
AZ91+12% SiC | ** | ** | * | ** | |||
39.24 | 2.6 | AZ91 | ** | * | * | ** | |
AZ91+3% SiC | ** | * | * | ** | |||
AZ91+6% SiC | ** | * | * | ** | |||
AZ91+9% SiC | ** | * | * | ** | |||
AZ91+12% SiC | ** | * | * | ** | |||
58.86 | 1.39 | AZ91 | * | *** | |||
AZ91+3% SiC | * | *** | |||||
AZ91+6% SiC | * | *** | |||||
AZ91+9% SiC | * | *** | |||||
AZ91+12% SiC | * | *** | * | ||||
58.86 | 2.6 | AZ91 | * | *** | * | ||
AZ91+3% SiC | * | *** | * | ||||
AZ91+6% SiC | * | *** | * | ||||
AZ91+9% SiC | * | *** | * | ||||
AZ91+12% SiC | * | *** | * |
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Kumar, A.; Kumar, S.; Mukhopadhyay, N.K.; Yadav, A.; Kumar, V.; Winczek, J. Effect of Variation of SiC Reinforcement on Wear Behaviour of AZ91 Alloy Composites. Materials 2021, 14, 990. https://doi.org/10.3390/ma14040990
Kumar A, Kumar S, Mukhopadhyay NK, Yadav A, Kumar V, Winczek J. Effect of Variation of SiC Reinforcement on Wear Behaviour of AZ91 Alloy Composites. Materials. 2021; 14(4):990. https://doi.org/10.3390/ma14040990
Chicago/Turabian StyleKumar, Anil, Santosh Kumar, Nilay Krishna Mukhopadhyay, Anshul Yadav, Virendra Kumar, and Jerzy Winczek. 2021. "Effect of Variation of SiC Reinforcement on Wear Behaviour of AZ91 Alloy Composites" Materials 14, no. 4: 990. https://doi.org/10.3390/ma14040990