چکیده مقاله
Friction stir processing FSP is a method that causes severe plastic deformation leading to microstructural modification and improvement of mechanical properties of materials In this study, microstructural and mechanical properties of pure copper were improved by FSP and also effect of changing the tool shoulder diameter on the mentioned properties above was evaluated Two different tool shoulder diameters were used in this study 12,20mm Optical microscopy and scanning electronic microscopy were used for microstructure evaluation of friction stir processed FSP specimens Results show that the grain size of stir zone in the specimens FSPed by smaller tool shoulder reduced more significantly compared to those one FSPed by bigger one due to the lower heat input Also the reduction of grain size and heat input led to 37% increment in the microhardness values of specimen produced by tool shoulder diameter of 12 mm than those of produced by 20 mm tool shoulder diameter
کلیدواژهها
نویسندگان
J. Jafari
School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran
M. K. Besharati Givi
School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran
M. Barmouz
School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran
شیوه ارجاع
Jafari, J. and Besharati Givi, M. K. and Barmouz, M.,1390,Effect of tool shoulder diameter variation on Improving the microstructure and mechanical properties of pure copper modified via friction stir processing,12th Iranian Conference on Manufacturing Engineering (ICME 2010),Tehran
ارائهشده در
مجموعه مقالات دوازدهمین کنفرانس ملی مهندسی ساخت و تولید ایران6 دی 1390 · تهران