Effect of Mn addition on Fe-rich intermetallics morphology and dry sliding wear investigation of hypereutectic Al-17.5%Si alloys

Journal of Materials Research and Technology

Saeed Ghodratnama Shabestari¹  Hassan Saghafian¹  Cyrus Bidmeshki²  Vahid Abouei²  Mohammad Talafi Noghani³ 

[1] Center of Excellence for High Strength Alloys Technology (CEHSAT), School of Metallurgy and Materials Engineering, Iran University of Science and Technology (IUST), Tehran, Iran;Department of Materials Engineering, Karaj Branch, Islamic Azad University, Karaj, Iran;Faculty of Engineering and Technology, Department of Materials Engineering, Imam Khomeini International University, Qazvin, Iran;

关键词: AlSi hypereutectic alloys;    Mn modification;    Intermetallic compounds;    Wear behavior;    Friction coefficient;   

DOI  :  10.1016/j.jmrt.2015.11.008

来源: DOAJ

【 摘 要 】

The effect of Manganese addition on the iron-rich intermetallics and wear behavior of Al-17.5%Si hypereutectic alloys has been studied. Dry sliding wear tests have been conducted using a pin-on-disk machine under different normal loads of 18, 51, 74 and 100 N and at a constant sliding speed of 0.3 m/s. The addition of 1.2 wt.% Fe to the base alloy increased the wear rate due to the formation of needle beta intermetallics. Introducing 0.6 wt.% Mn to the iron-rich alloy changed the beta intermetallics into the modified alpha phases, and therefore reduced the detrimental effect of iron. Mn addition up to 0.9 wt.% to the 1.8Fe alloy did not impede formation of needle-like intermetallic compounds and had no positive effect on the modification of microstructure.

【 授权许可】

Unknown