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Lasers in Manufacturing and Materials Processing

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07-09-2021

Numerical Simulation of Thermal Behavior and Experimental Investigation of Thin Walls during Direct Metal Deposition of 316L Stainless Steel Powder

Authors: Zahra Mianji, A. A. Kholopov, I. I. Binkov, Ali Kiani

Published in: Lasers in Manufacturing and Materials Processing | Issue 4/2021

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Abstract

Direct metal deposition (DMD) is a method of additive manufacturing in which parts are manufactured by melting powder particles that reach the working area, layer by layer, using a laser beam. Thin walls are built by the means of direct metal deposition (DMD) from 316L stainless steel powder. A multi-layer finite element model (FEM) is used to predict the thermal cycles, maximum temperatures, and volume of the molten pool during DMD. The experimental methods and the simulation processes show effects of heat accumulation with the addition of new layers, especially at the beginning and at the end of each layer. The microstructure of the samples is examined by an optical microscope. The experimental results indicate that microstructure has a disorganised form in the outer regions that are closer to the surrounding air, and that grains grow in groups in the inner parts of the samples.

previous article A Comparative Stress Corrosion Cracking Study of Stainless Steel Sheets Marked with Laser and Conventional Mechanical Stamping

next article Investigation on Surface Morphology and Dimensional Characteristics of Micro-channels Fabricated on Titanium-V Alloy by DPSS Nd:YAG Laser

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Title: Numerical Simulation of Thermal Behavior and Experimental Investigation of Thin Walls during Direct Metal Deposition of 316L Stainless Steel Powder
Authors: Zahra Mianji
A. A. Kholopov
I. I. Binkov
Ali Kiani
Publication date: 07-09-2021
Publisher: Springer US
Published in: Lasers in Manufacturing and Materials Processing / Issue 4/2021
Print ISSN: 2196-7229
Electronic ISSN: 2196-7237
DOI: https://doi.org/10.1007/s40516-021-00155-1

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