Microstructural characterization of 316L stainless steel fabricated by direct metal deposition method

سال انتشار: 1399
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 170

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شناسه ملی سند علمی:

INCWI21_025

تاریخ نمایه سازی: 19 فروردین 1400

چکیده مقاله:

Microstructure, defects and hardness of 316L stainless steel fabricated by Direct Metal Deposition (DMD) method were investigated in this study. 316Ll powder was depositedon a substrate of the same composition under the optimum operation parameters in a single-pass mode. Microstructural investigations were conducted along the builddirection as well as transverse to the build direction. Boundaries of the melt pools and the final microstructure were studied by optical microscopy and dimensional measurements were conducted by ImageJ software. Microstructural defects and distribution of the alloying elements were studied using scanning electron microscopy (SEM) and energydispersive X-ray spectroscopy (EDS) analysis. Different phases formed in the samples were identified by X-ray diffraction analysis. Hardness measurements were also conducted on the build direction of the sample. Results indicated the formation of a dendritic cellular structure with an average arm diameter of 3.5 micrometers formed at a cooling rate of about 13000 K/s. SEM and EDS analyses revealed formation of a small fraction of delta phase in the microstructure.

نویسندگان

Majid Goli

Master student, Isfahan University of Technology, Iran/Mobarakeh Steel Engineering Company

Behzad Niroumand

Professor, Isfahan University of Technology, Iran

Mohammad Raza Toroghinejad

Professor, Isfahan University of Technology, Iran

Mohammad Hossein Mosallanejad

PhD student, Isfahan University of Technology, Iran

Abdollah Saboori

Assistant professor, Polytechnic University of Turin, Italy