چکیده مقاله
Plastic strain distribution at high temperatures plays a crucial role in mechanical properties of deformed material during severe plastic deformation SPD In present study, plastic strain distribution at 400°C was investigated for aluminum 7075 alloy by comparing two different SPD techniques known as dual equal channel lateral extrusion DECLE and equal channel angular pressing ECAP The comparative study was made by applying simulated and experimental methods Performing numerical simulation by Arrhenius type constitutive equation is preferred to Johnson Cook model as it considers the coupled effect of strain rate and temperature This results more prediction accuracy of flow stress at high temperatures Results of simulation show that the amount of average plastic strain obtained in each pass of DECLE process is larger than that obtained in ECAP process Similarly, more homogeneous plastic strain is achieved within DECLE processed material in each pass In addition, the macro crack nucleation in DECLE processed sample is more possible Results of tensile tests demonstrate larger yield and ultimate tensile strength by DECLE process in comparison with ECAP process
کلیدواژهها
نویسندگان
Farid Biniyazan
MSc grad , Dep of Mech Eng , Science and Research Branch, Islamic Azad University, Tehran, Iran
h Soleimanimehr
Assistance Prof , Dep of Mech Eng , Science and Research Branch, Islamic Azad University, Tehran, Iran
e Kermani
MSc grad , Dep of Mater Sci and Eng , Science and Research Branch, Islamic Azad University, Tehran, Iran
s Ejlali
MSc grad , Dep of Mater Sci and Eng , Sharif University of Technology, Tehran, Iran
b Rezaee
MSc grad , Dep of Mater Sci and Eng , Iran University of Science and Technology, Tehran, Iran
شیوه ارجاع
Biniyazan, Farid and Soleimanimehr, h and Kermani, e and Ejlali, s and Rezaee, b,1398,Numerical and Experimental Comparison of ECAP and DECLE Processes during High-Temperature Deformation of AA7075,International Conference on Manufacturing Engineering,Tehran
ارائهشده در
مجموعه مقالات شانزدهمین همایش ملی و پنجمین کنفرانس بین المللی مهندسی ساخت و تولید27 آذر 1398 · تهران