چکیده مقاله
Dissimilar joining of AZ31 magnesium alloy and St37 low carbon steel was performed through friction stir butt welding FSW at constant tool rotation rate of 710 rpm and travel speed of 40 mm/min The effect of welding parameters on joining mechanism, interface microstructure and mechanical properties was investigated The experimental results revealed that sound defect free joint could be obtained when the harder St37 plate was fixed at the advancing side A steel strip was formed at the bottom of the Mg side weld nugget Steel fragments were dispatched from the interface into the Mg alloy matrix, which formed a composite structure during the welding process Fine and equiaxed grains were formed in the SZ and TMAZ at the Mg alloy side On the otherhand, St37 experienced a low amount of deformation, and therefore, TMAZ zone with elongated grains was only formed near the interface at the steel side Tensile strength of the sound joint was about 166 MPa, which is 62% of magnesium base alloy The relatively high hardness value in the Mg SZ was attributed not only to the grain refinement strengthening, but also to the composite structure consisting of steel fragments
کلیدواژهها
نویسندگان
Amin Shakoori
MSc student, Sahand University of Technology, Iran
Tohid Saeid
Professor, Sahand University of Technology, Iran
شیوه ارجاع
Shakoori, Amin and Saeid, Tohid,1400,Dissimilar joining of magnesium alloy and low carbon steel by friction stir butt welding,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