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Dry sliding wear behaviour of $Al6061–5%SiC—TiB_{2}$ hybrid metal matrix composites synthesized by stir casting process
| Content Provider | Scilit |
|---|---|
| Author | Hillary, J. Justin Maria Ramamoorthi, R. Chelladurai, Samson Jerold Samuel |
| Copyright Year | 2020 |
| Description | Journal: Materials Research Express Functionally graded Al6061-SiC composites are widely used in the manufacturing of bearing surfaces, bushes, gears, cylinder liners, pistons and camshafts. However, due to the poor density and higher level of porosity, the usages of Al6061-SiC composites are limited. The Purpose of the study is to improve the wear behaviour of the Al606l–SiC composites to widen the engineering application of the Al6061 alloy. In this present work, an effort is made to examine the dry sliding wear characteristics on a newly developed hybrid metal matrix composite of Al6061%-5%SiC-x $TiB_{2}$ (x = 2%, 4%, 6%, 8% and 10 wt%) fabricated by stir casting route. The Wear Rate and Coefficient of Friction were examined using a Pin-on-Disc tribometer at various dry sliding conditions. The results of the experimental studies revealed that with the addition of secondary hard ceramic $TiB_{2}$ particles, the wear behaviour was found to be significantly improved on the hybrid composite due to the new formation of Mechanically Mixed Layer $(Fe_{2}O_{3}$ layer). The Coefficient of Friction showed a decreasing trend in the case of varying loads and sliding distances. Conversely, the COF exhibit an increasing trend concerning the sliding velocities. The results have shown that the highly concentrated $Al6061—5%SiC—10%TiB_{2}$ hybrid composite achieved the least COF values of 0.26, 0.31 and 0.29 at higher applied load (40N), sliding distance (2000 m) and sliding velocity (2.61 m $s^{−1}$) conditions respectively. The worn surface of the hybrid composite indicates fine grooves with minimal abrasion. |
| Related Links | https://iopscience.iop.org/article/10.1088/2053-1591/abd19b/pdf |
| ISSN | 20531591 |
| e-ISSN | 20531591 |
| DOI | 10.1088/2053-1591/abd19b |
| Journal | Materials Research Express |
| Issue Number | 12 |
| Volume Number | 7 |
| Language | English |
| Publisher | IOP Publishing |
| Publisher Date | 2020-12-01 |
| Access Restriction | Open |
| Subject Keyword | Journal: Materials Research Express Composite Materials Metal Matrix Hybrid Metal Matrix Composites Stir Casting Dry Sliding Wear |
| Content Type | Text |
| Resource Type | Article |
| Subject | Surfaces, Coatings and Films Metals and Alloys Biomaterials Electronic, Optical and Magnetic Materials Polymers and Plastics |
