Wear Behavior of AZ۳۱/AlN/Graphite Hybrid Nano-composite Fabricated by Friction Stir Processing
سال انتشار: 1401
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 110
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شناسه ملی سند علمی:
MGMCD01_012
تاریخ نمایه سازی: 25 فروردین 1402
چکیده مقاله:
The microstructure, micro hardness, and wear properties of AZ۳۱/AlN/graphite nano-composite surface layers, fabricated by friction-stir processing were investigated. The layers were fabricated by friction-stir processing of AZ۳۱ substrate pre-placed by nano-sized AlN with mean particle size of ~۳۵nm and graphite particles with mean particle size of ~۴m. The AZ۳۱/AlN and AZ۳۱/AlN/graphite nano-composite surface layer was achieved using a tool rotation and substrate advancing speed of ۱۰۰۰rpm and ۵۰ mm/min, respectively. All of the fabricated layers were subjected to three additional passes.Wear tests were performed for sliding distance of ۱۰۰۰m and sliding velocity of ۰.۵m/s. Different loads were applied to investigate the changes in wear mechanism. The mean micro hardness value of the surface nano-composite layer was found to be improved by almost two times as compared to that of the as-received AZ۳۱ substrate. The surface nano-composite layer produced by four passes showed superior wear resistance and lower friction coefficient; this is attributed to its greater micro hardness value and lubrication effect of graphite particles.
کلیدواژه ها:
نویسندگان
Sarah B.Shirazi
School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, P.O. Box ۱۱۱۵۵-۴۵۶۳Tehran, Iran
Seyed Frshid Kashani-Bozorg
School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, P.O. Box ۱۱۱۵۵-۴۵۶۳Tehran, Iran