Effect of increasingly metallized hybrid reinforcement on the wear mechanisms of magnesium nanocomposite

Bulletin of materials science

K S TUN³  M GUPTA¹  S FIDA HASSAN²  A M AL-QUTUB²  S ZABIULLAH² 

[1] Department of Mechanical Engineering, National University of Singapore, Singapore 117576, Singapore$$Department of Mechanical Engineering, National University of Singapore, Singapore 117576, SingaporeDepartment of Mechanical Engineering, National University of Singapore, Singapore 117576, Singapore$$;Department of Mechanical Engineering, King Fahd University of Petroleum & Minerals, P.O. Box 1061, Dhahran 31261, Kingdom of Saudi Arabia$$Department of Mechanical Engineering, King Fahd University of Petroleum & Minerals, P.O. Box 1061, Dhahran 31261, Kingdom of Saudi ArabiaDepartment of Mechanical Engineering, King Fahd University of Petroleum & Minerals, P.O. Box 1061, Dhahran 31261, Kingdom of Saudi Arabia$$;Technology Development Centre, ITE College Central, Singapore 567720, Singapore$$Technology Development Centre, ITE College Central, Singapore 567720, SingaporeTechnology Development Centre, ITE College Central, Singapore 567720, Singapore$$

关键词: Metalâ€�?�matrix composite;    wear testing;    sliding wear;    electron microscopy.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Strength and ductility of pure magnesium have experienced simultaneous improvement due to the presence of nanosize hybrid (yttria and copper) reinforcement. Increasing the vol% (i.e., 0.3�??1.0) of ductile metallic copper particles in reinforcement has further enhanced the strength ofagnesium.Wear behaviour of these magnesium hybrid nanocomposites was investigated using pin-on-disc dry sliding tests against hardened tool steel using a constant sliding speed of 1ms$^{�?1}$ under a range of loads from5 to 30 N for a sliding distance of 1000 m. Scanning electron microscopy identified abrasion and delamination as primary wear mechanisms in the hybrid nanocomposite.Oxidation was active in nanocomposite with higher copper content, tested under higher load and positively affected the wear resistance. Limited thermal softening was observed when tested at a relatively higher load. High frictional heat dissipation capacity couples with higher hardness resisted adhesive wear which is common mechanism for magnesium composite.

【 授权许可】

Unknown