چکیده مقاله
In this research, effect of second pass of friction stir welding on the microstructure mechanical properties of dissimilar aluminium alloys welds was studied For this purpose, Al Si and Al Mg alloys were used as base metals Microstructure of base metals and stirred zone of welds were investigated by optical and scanning electron microscopes Mechanical properties of welds were studied by tensile test and compared with that of the base metals Based on the results it was observed that by applying the second FSW pass, mixing of the base metals in the stirred zone was changed from mechanical to chemical mixing Accordingly, the tensile properties of the 2 pass weld considerably increased compared to the 1 pass weld so that fracture stress and strain increased from 60 6 to 113 7 MPa ~88% and 2 to 4 % 100% , respectively It was concluded that by increasing the welding pass from 1 pass to 2 passes, the joining mechanism changed from mostly mechanical locking to mainly metallurgical bonding It was revealed that the second FSW pass is extremely beneficial to the microstructure and mechanical properties and hence weld quality of dissimilar aluminium alloys welds
کلیدواژهها
نویسندگان
M. Kuhgard
Master Student, Department of Materials and Polymer Engineering, Hakim Sabzevari University, Sabzevar
M.H Daneshifar
Assistant Professor, Department of Materials and Polymer Engineering, Hakim Sabzevari University, Sabzevar
M.A Jabbareh
Assistant Professor, Department of Materials and Polymer Engineering, Hakim Sabzevari University, Sabzevar
شیوه ارجاع
Kuhgard, M. and Daneshifar, M.H and Jabbareh, M.A,1400,Multipass Dissimilar Friction Stir Welding of Al Alloys,4th International Conference on Welding and Non Destructive Testing & 22nd National Conference on Welding & Inspection & 11th National Conference on NDT,Isfahan
ارائهشده در
مجموعه مقالات چهارمین کنفرانس بین المللی جوشکاری و آزمایش های غیرمخرب و بیست و دومین کنفرانس ملی جوش و بازرسی و یازدهمین کنفرانس ملی آزمایش های غیرمخرب18 اسفند 1400 · اصفهان