چکیده مقاله
This research investigates the influence of the TIG Wire Arc Additive Manufacturing TIG WAAM process on the evolution of 8 ferrite phase morphology in 316 stainless steel, aiming to clarify how process parameters and alloying elements govern solidification behavior and resultant properties The study focuses on correlating deposition conditions such as deposition rate, heat input, inter layer pauses, and alloy content with microstructural characteristics of 8 ferrite and their impact on mechanical performance Austenitic 316 stainless steel fabricated by additive manufacturing exhibited a two phase microstructure comprising y austenite and 8 ferrite, with phase stability directly linked to alloying elements including chromium, nickel, molybdenum, and nitrogen, which influence ferrite and austenite stabilization during solidification Such phase relationships control solidification pathways and result in distinct microstructures The elemental composition of the samples was quantified using Energy Dispersive X Ray Spectroscopy EDAX , while 8 ferrite morphologies were examined using optical microscopy OM and image analysis tools The results demonstrated the formation of diverse 8 ferrite morphologies including lathy, skeletal, vermicular, and acicular structures whose evolution was found to be substantially affected by deposition rate and heat flow These morphological variations significantly influenced phase distribution and microstructural features, thereby affecting mechanical behavior, particularly microhardness and strength The findings confirm that TIG WAAM processing conditions can be tailored to control 8 ferrite morphology, enabling optimization of both mechanical properties and microstructure for demanding structural applications Enhanced understanding of these relationships supports refined process strategies for additive manufacturing of austenitic stainless steels
کلیدواژهها
نویسندگان
Ali Fakharian
Faculty of Materials and Metallurgical Engineering, Semnan University, Semnan, Iran
Mohammad Yousefieh
Faculty of Materials and Metallurgical Engineering, Semnan University, Semnan, Iran
Majid Mohammadi
Faculty of Chemical and Materials Engineering, Shahrood University of Technology, Shahrood, Iran
Hananeh Najafi Javid
Faculty of Materials and Metallurgical Engineering, Semnan University, Semnan, Iran
شیوه ارجاع
Fakharian, Ali and Yousefieh, Mohammad and Mohammadi, Majid and Najafi Javid, Hananeh,1404,Influence of TIG-WAAM Process Parameters on Delta Ferrite Morphology and Mechanical Response in AM-316 Stainless Steel,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