Production of Dispersed Ceramic Nano-Particles in Al Alloy Using Friction Stir Processing

Journal of Modern Processes in Manufacturing and Production

مقاله 4، دوره 5، شماره 3، آبان 2016، صفحه 41-57   

نوع مقاله: Research Paper

نویسندگان

Amin Rabiezadeh^{* 1}؛ Ahmad Afsari²

¹Young Researchers and Elite Club, Shiraz Branch, Islamic Azad University, Shiraz, Iran

²Departments of Mechanical Engineering, Shiraz Branch, Islamic Azad University, Shiraz, Iran

چکیده

In this research, surface composite layers containing nano sized TiB₂, Al₂O₃-TiB₂, ZrO₂ and CNT particles have been fabricated on Aluminum alloy substrates by friction stir processing. The effects of different processing variables such as number of passes and strengthening particle distribution, hardness, and wear properties of surface nanocomposite layers have been evaluated by electron microscopy, hardness, and wear test. Results showed that surface properties of aluminum alloy will be enhanced and the optimum conditions of properties which can be determined by comparing the effects of different parameters will be obtained. An increasein the number of passes up to four modifies microstructure and accordingly mechanical and wear properties were enhanced.Surface composite produced by FSP significantly improved the dry sliding wear resistance of the Al 6061 alloy by changing the wear mechanism. The FSPed sample with Al₂O₃-TiB₂ particles had higher wear resistance in comparison with those with TiB₂, ZrO₂ and CNT. This enhancement is a consequent of better bonding between particles and aluminum matrix and higher microhardness.

کلیدواژه‌ها

Aluminum Alloy؛ Friction Stir Processing؛ Titanium diboride؛ CNT؛ Zirconia؛ Wear Properties