Influence of Basic Process Parameters on Mechanical and Internal Properties of 316l Steel in SLM Process for Renishaw Am400

Hajnyš, Jiří; Pagáč, Marek; Kotera, O.; Petrů, Jana; Scholz, Sebastian

doi:10.17973/mmsj.2019_03_2018127

Cited by 12 publications

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“…The aim of the article is to better understand what happens during TIG welding of two materials printed by the SLM method. At present, there are already many articles focused on the optimization of process parameters [ 10 , 11 , 12 ], microstructure [ 13 , 14 , 15 , 16 ] and surface roughness [ 17 , 18 , 19 , 20 , 21 , 22 ] of AISI (American Iron and Steel Institute) 316L material after printing by SLM. However, there are still only few studies [ 23 , 24 ] dealing with the weldability of this material.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Welded Joint Properties on an AISI316L Stainless Steel Tube Manufactured by SLM Technology

et al. 2020

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This work is focused on the analysis of the influence of welding on the properties and microstructure of the AISI316L stainless steel tube produced by 3D printing, specifically the SLM (Selective Laser Melting) method. Both non-destructive and destructive tests, including metallographic and fractographic analyses, were performed within the experiment. Microstructure analysis shows that the initial texture of the 3D print disappears toward the fuse boundary. It is evident that high temperature during welding has a positive effect on microstructure. Material failure occurred in the base material near the heat affected zone (HAZ). The results obtained show the fundamental influence of SLM technology in terms of material defects, on the properties of welded joints.

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Section: Introductionmentioning

confidence: 99%

Analysis of Welded Joint Properties on an AISI316L Stainless Steel Tube Manufactured by SLM Technology

et al. 2020

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“…The porosity varied with various parameters, such as the number of layers laid and the printing time. The study [19] dealt with the optimization of those parameters, and the production parameters from this study were used to produce the specimens in our study. These production parameters guaranteed a porosity of more than 99.9%.…”

Section: Methodsmentioning

confidence: 99%

“…These production parameters guaranteed a porosity of more than 99.9%. Other 3D printing parameters are shown in Table 1 [19,20] (QuantAM, SW made by company Renishaw) [21]. Building time was 76 h. The part orientation and the position in the chamber, the 3D printing preview, and the chessboard strategy preview in the cross-section are presented in Figure 1.…”

Section: Methodsmentioning

confidence: 99%

Monotonic Tension-Torsion Experiments and FE Modeling on Notched Specimens Produced by SLM Technology from SS316L

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The aim of this work was to monitor the mechanical behavior of 316L stainless steel produced by 3D printing in the vertical direction. The material was tested in the “as printed” state. Digital Image Correlation measurements were used for 4 types of notched specimens. The behavior of these specimens under monotonic loading was investigated in two loading paths: tension and torsion. Based on the experimental data, two yield criteria were used in the finite element analyses. Von Mises criterion and Hill criterion were applied, together with the nonlinear isotropic hardening rule of Voce. Subsequently, the load-deformation responses of simulations and experiments were compared. Results of the Hill criterion show better correlation with experimental data. The numerical study shows that taking into account the difference in yield stress in the horizontal direction of printing plays a crucial role for modeling of notched geometries loaded in the vertical direction of printing. Ductility of 3D printed specimens in the “as printed” state is also compared with 3D printed machined specimens and specimens produced by conventional methods. “As printed” specimens have 2/3 lower ductility than specimens produced by a conventional production method. Machining of “as printed” specimens does not affect the yield stress, but a significant reduction of ductility was observed due to microcracks arising from the pores as a microscopic surface study showed.

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“…The generated shape transfers the pressure load onto fixed supports. The model needs to be smoothed in order to obtain a continual surface mesh for the best manufacturability and end usability in a real-world scenario [15][16][17]. be smoothed in order to obtain a continual surface mesh for the best manufacturability and end usability in a real-world scenario [15][16][17].…”

Section: Principle Of Topology Optimizationmentioning

confidence: 99%

Comprehensive View on Racing Car Upright Design and Manufacturing

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This paper deals with the design of an upright using a topological optimization. This type of optimization is a relatively young and rapidly evolving area of computational mechanics that seeks to make multiple material savings that cannot be achieved by conventional methods. The optimized upright was utilized in a fully functional prototype of the student formula within the Formula Student competition. The main objective of the optimization was to meet the requirements of the physical properties, weight, stiffness, and strength of the upright. The initial model of the upright was iteratively optimized using topological optimization and a finite element static analysis to obtain the final model. Using the finite element analysis, its behavior in operation within individual load cases was predicted. Symmetry was used to mirror the finished model to obtain the opposite upright of the other side of the car. Finally, the topologically optimized upright was compared with an upright made by conventional methods.

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Influence of Basic Process Parameters on Mechanical and Internal Properties of 316l Steel in SLM Process for Renishaw Am400

Cited by 12 publications

References 0 publications

Analysis of Welded Joint Properties on an AISI316L Stainless Steel Tube Manufactured by SLM Technology

Analysis of Welded Joint Properties on an AISI316L Stainless Steel Tube Manufactured by SLM Technology

Monotonic Tension-Torsion Experiments and FE Modeling on Notched Specimens Produced by SLM Technology from SS316L

Comprehensive View on Racing Car Upright Design and Manufacturing

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