Dry Sliding Wear Behavior of 6351 Al-(4?vol.% SiC?+?4?vol.% Al2O3) Hybrid Composite
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- 作者：Bijay Kumar Show (1)
Dipak Kumar Mondal (1)
Joydeep Maity (1) - 关键词：(4?vol.% SiC?+?4 vol.% Al2O3) hybrid reinforcement ; 6351 Al alloy ; nucleation and epitaxial growth of Al2O3 ; wear behavior
- 刊名：Journal of Materials Engineering and Performance
- 出版年：2014
- 出版时间：December 2014
- 年：2014
- 卷：23
- 期：12
- 页码：4278-4288
- 全文大小：3,092 KB
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文摘
In this research work, the dry sliding wear behavior of 6351 Al-(4?vol.% SiC?+?4?vol.% Al2O3) hybrid composite was investigated at low sliding speed (1?m/s) against a hardened EN 31 disk at different loads. In general, the wear mechanism involved adhesion (along with associated subsurface cracking and delamination) and microcutting abrasion at lower load. While at higher load, abrasive wear involving microcutting and microploughing along with adherent oxide formation was observed. The overall wear rate increased with increasing normal load. The massive particle clusters as well as individual reinforcement particles were found to stand tall to resist abrasive wear. Besides, at higher load, the generation of adherent nodular tribo-oxide through nucleation and epitaxial growth on existing Al2O3 particles lowered down the wear rate. Accordingly, at any normal load, 6351 Al-(4?vol.% SiC?+?4?vol.% Al2O3) hybrid composite exhibited superior wear resistance (lower overall wear rate) than the reported wear resistance of monolithic 6351 Al alloy.