چکیده مقاله
Wire Arc Additive Manufacturing WAAM with cold wire CW WAAM offers several advantages over conventional WAAM processes In addition to enhancing deposition rate and productivity, CW WAAM can possible the input energy independent of the wire feed rate, thereby enabling more precise control of process parameters This approach also reduces penetration depth, minimizes the heat affected zone, and achieves dilution levels below 20%, which are beneficial for alloying and microstructural refinement In the present study, a thin alloy wall was fabricated by introducing aluminum alloy ER4043 as cold wire into austenitic stainless steel ER316L using CW WAAM with a reciprocating torch pattern The wall was deposited at a nominal current of 120 A, with the cold wire torch positioned at a 45° angle, and built up in 22 successive layers Optical microscopy revealed distinct microstructural variations across the wall In the central region, low cooling rates and heat accumulation from layer by layer deposition promoted the growth of columnar and coarse grains aligned with the heat transfer direction In contrast, the upper and lower regions exhibited finer grain structures Aluminum rich precipitates were observed within grains and along grain boundaries, though their distribution was non uniform, indicating the necessity of post deposition heat treatment Mechanical characterization confirmed these microstructural findings Tensile specimens demonstrated increased strength but fractured in a brittle manner, with the highest tensile strength recorded for the flat sample 554 MPa Microhardness testing further showed that hardness enhancement in the initial and final layers correlated with finer microstructures The average hardness of the wall was measured at 321 HV, underscoring the influence of microstructural heterogeneity on mechanical performance
کلیدواژهها
نویسندگان
Vahid Ziaei Laleh
PhD student, Sahand University of Technology, Tabriz, Iran
Jamal Sartibi
Master of Materials Engineering, Sahand University of Technology, Tabriz, Iran
Habib Hamed Zargari
Assistant Professor, Sahand University of Technology, Tabriz, Iran
شیوه ارجاع
Ziaei Laleh, Vahid and Sartibi, Jamal and Zargari, Habib Hamed,1404,Effect of adding cold wire of aluminum alloy 4043 on the microstructure and mechanical properties of thin-walled austenitic stainless steel 316L produced via wire arc additive manufacturing,8th International Conference on Welding and Non Destructive Testing & 26th National Conference on Welding & Inspection & 15th National Conference on NDT & 4th National Conference on Additive Manufacturing,Tehran
ارائهشده در
مجموعه مقالات هشتمین کنفرانس بین المللی جوشکاری و آزمایش های غیرمخرب، بیست و ششمین کنفرانس ملی جوش و بازرسی، پانزدهمین کنفرانس ملی آزمایش های غیرمخرب و چهارمین کنفرانس ملی ساخت افزایشی20 بهمن 1404 · تهران