چکیده مقاله
Additive manufacturing AM of metals has emerged as a transformative approach for producing complex components, with Wire Arc Additive Manufacturing WAAM and Selective Laser Melting SLM representing two prominent techniques In this study, austenitic stainless steel 316L was fabricated using GMAW based WAAM to investigate the influence of thermal history on microstructural evolution and mechanical properties The as fabricated WAAM walls exhibited a dual phase microstructure composed of y austenite and 8 5% retained 8 ferrite, consistent with FA ferritic austenitic solidification predicted by the Schaeffler diagram Columnar dendritic grains predominantly grew opposite to the heat flow direction, and no carbide precipitates or manufacturing defects such as cracks, pores, or lack of fusion were observed Microhardness measurements revealed a gradual decrease from the bottom to the top layers, attributed to thermal accumulation, reduced cooling rates, and grain coarsening Comparatively, SLM produced 316L exhibits fully austenitic microstructures or minimal 8 ferrite
کلیدواژهها
نویسندگان
MohammadAmin Zarei Sahamie
M Sc Graduated, School of Metallurgy and Materials Engineering, Iran University of Science and Technology IUST , Tehran, Iran
Saeed G. Shanestari
Professor, School of Metallurgy and Materials Engineering, Iran University of Science and Technology IUST , Tehran, Iran
Hamidreza Abedi
Assistant Professor, School of Metallurgy and Materials Engineering, Iran University of Science and Technology IUST , Tehran, Iran
شیوه ارجاع
Zarei Sahamie, MohammadAmin and Shanestari, Saeed G. and Abedi, Hamidreza,1404,Effects of Thermal History on Solidification Structure, d-Ferrite Retention, and Microhardness Gradients in WAAM-Fabricated 316L 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