چکیده مقاله
Aluminum and steel are the most utilized metals in industry and joining of these two has many applications including heat exchangers and parts in aluminum extraction process In this research ،Upset Resistance Welding of aluminum to stainless steels rods was studied Macrostructure of the joints showed formation of upset at aluminum side of all samples The upset size increased with welding heat input ،improving joints mechanical properties with removal of contaminations from weld interface Microstructural studies from aluminum side of the samples exhibited recrystallization and grain growth as a result of cold worked microstructure in base metal At stainless steel side however ، formation of macro and micro twins was the dominant phenomena A thin reaction layer 0 5 Micrometers formed at the weld interface composed of intermetallic compounds ، and increasing heat input resulted in thickening up to 2 3 Micrometers and continuity of this layer Microhardness test indicated hardness increase adjacent to weld interface in stainless steel side of the samples ،confirming formation of micro twins Tensile strength of the samples increased with weld heat input from ~67 up to ~84 MPa ،but the formability and elongation of the welds were limited Additionally ،post weld heat treatment resulted in enhancement of welds strength up to two times via promotion of the interdiffusion of the Al and Fe atoms through the joint interface
کلیدواژهها
نویسندگان
Milad Abiri
Master Student ،Sharif University of Technology
مجتبی موحدی
Department of Materials Science and Engineering ،Sharif University of Technology
Ahkan ozlati
Ph D Student ،Sharif University of Technology
شیوه ارجاع
Abiri, Milad and Movahedi, Mojtaba and ozlati, Ahkan,1399,Upset resistance welding of stainless steel to aluminium seri 6xxx,3rd International Conference on Welding and Non-Destructive Testing of Iran, 21st National Conference on Welding and Inspection and 10th National Conference on Non-Destructive Testing,Isfahan
ارائهشده در
مجموعه مقالات سومین کنفرانس بین المللی جوشکاری و آزمایش های غیرمخرب ایران، بیست و یکمین کنفرانس ملی جوش و بازرسی و دهمین کنفرانس ملی آزمایش های غیرمخرب13 اسفند 1399 · اصفهان