چکیده مقاله
Metal additive manufacturing, especially the Selective Laser Melting SLM method, enables the production of complex parts with controlled microstructure The nickel based superalloy IN718, as one of the most widely used materials in high temperature applications, is utilized in aerospace and energy industries due to its optimal combination of strength, corrosion resistance, and thermal stability However, rapid thermal cycles and high temperature gradients in the Selective Laser Melting process can lead to the formation of heterogeneous microstructures, significant surface roughness, and local variations in mechanical properties This research investigates the effect of post manufacturing solution and aging heat treatment on the microstructure, as well as on surface roughness and hardness, of IN718 parts produced by the Selective Laser Melting method Samples were prepared in both as built and heat treated conditions and were evaluated using optical and scanning electron microscopy, surface roughness testing, and micro Vickers hardness testing Results showed that heat treatment leads to a more homogeneous microstructure, alleviates initial inhomogeneities, and improves the uniformity of phase distribution Alongside these microstructural changes, surface roughness and hardness were evaluated in the as built condition Comparison of these properties in the as built samples indicated a surface with relative roughness and initial hardness corresponding to the fabrication conditions The present study emphasizes the effective role of heat treatment in optimizing the microstructural characteristics of SLM produced IN718 components and provides a basis for future integrated investigations
کلیدواژهها
نویسندگان
Seyed Mahdi Hosseini Kashani
M Sc Student in Mechanical Engineering, Manufacturing and Production, Malek Ashtar University of Technology, Tehran, Iran
Seyed Masoud Barekat
Ph D in Materials and Metallurgy, Material Selection and Identification, Malek Ashtar University of Technology, Tehran, Iran
Mohammad Erfanmanesh
Ph D in Materials and Metallurgy, Material Selection and Identification, Malek Ashtar University of Technology, Tehran, Iran
Jafar Skandari jam
Ph D Mechanical Behavior of Composite Materials, Material Selection and Identification, Malek Ashtar University of Technology, Tehran, Iran
شیوه ارجاع
Hosseini Kashani, Seyed Mahdi and Barekat, Seyed Masoud and Erfanmanesh, Mohammad and Skandari jam, Jafar,1404,Microstructural Investigation and Evaluation of Surface Properties and Hardness in Inconel 718 Parts Fabricated by Selective Laser Melting (SLM) with Heat Treatment Application,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