TY - JOUR T1 - resistance spot welding of nanostructured Al 2024 alloy and Evaluation of mechanical properties Weldment TT - جوشکاری مقاومتی نقطه ای آلیاژ آلومینیوم 2024 نانوساختار و ارزیابی خواص مکانیکی اتصال JF - JWSTI JO - JWSTI VL - 3 IS - 2 UR - http://jwsti.iut.ac.ir/article-1-68-en.html Y1 - 2018 SP - 49 EP - 57 KW - Al 2024 alloy KW - nanostructure KW - Cryorolling KW - Resistance spot welding KW - Mechanical properties N2 - In this research in order to improve the mechanical properties of Aluminium alloy 2024, nanostructure Aluminum sheets were first produced by Cryorolling process and then was welded by resistance spot welding method. For this purpose, the samples solution treated at 495˚C for 55 minute and subsequently cryorolled up to 85% reduction in thickness. For obtaining simultaneous strength and ductility, the cryorolled sheets were then subjected to aged. In this regard the produced samples were then resistance spot welded with different welding parameters, including welding current 60 to 105 KA, electrode force of 3 KN, and welding time of 0.1 s. The highest tensile shear peak load was obtained through welding with 95 KA current. M3 ER -