Influence of Scanning Strategy Parameters on Residual Stress in the SLM Process According to the Bridge Curvature Method for AISI 316L Stainless Steel

Hajnyš, Jiří; Pagáč, Marek; Měsíček, Jakub; Petrů, Jana; Król, M.

doi:10.3390/ma13071659

Cited by 50 publications

(28 citation statements)

References 19 publications

(23 reference statements)

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“…Particle size was measured by an optical method on the KYENCE VHX-5000 (KYENCE, Osaka, Japan) device. These results were acquire from our previously research [ 27 ].…”

Section: Methodsmentioning

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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“…Particle size was measured by an optical method on the KYENCE VHX-5000 (KYENCE, Osaka, Japan) device. These results were acquire from our previously research [ 27 ].…”

Section: Methodsmentioning

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 main alloy components of maraging steel are nickel, cobalt, and molybdenum, as well as a low content of carbon [ 1 , 2 ]. The 18Ni-300 steel is generally heat treated, hardened and then aged in a temperature range of 450–510 °C, which results in improved mechanical properties (i.e., hardness and strength as nucleation effect [ 3 , 4 ] like γ -Ni 3 Mo, NiAl, Ni 3 (Al, Ti), Ni 3 (Ti, Mo), Ni(Al, Fe), η -Ni 3 Ti, Fe 2 Mo, σ -FeMo, µ -Fe 7 Mo 6 , FeTi, Fe 2 Ti, and Ni 3 Al [ 5 , 6 ]). As a result of such research, the development [ 7 , 8 , 9 ] and optimization of chemical compositions and heat treatment processes has distinguished groups of maraging steel 18Ni-300, due to particularly high strength properties that exceed 2000 MPa of tensile strength.…”

Section: Introductionmentioning

confidence: 99%

Selective Laser Melting of 18NI-300 Maraging Steel

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In the present study, 18% Ni 300 maraging steel powder was processed using a selective laser melting (SLM) technique to study porosity variations, microstructure, and hardness using various process conditions, while maintaining a constant level of energy density. Nowadays, there is wide range of utilization of metal technologies and its products can obtain high relative density. A dilatometry study revealed that, through heating cycles, two solid-state effects took place, i.e., precipitation of intermetallic compounds and the reversion of martensite to austenite. During the cooling process, one reaction took place (i.e., martensitic transformation), which was confirmed by microstructure observation. The improvements in the Rockwell hardness of the analyzed material from 42 ± 2 to 52 ± 0.5 HRC was improved as a result of aging treatment at 480 °C for 5 h. The results revealed that the relative density increased using laser speed (340 mm/s), layer thickness (30 µm), and hatch distance (120 µm). Relative density was found approximately 99.3%. Knowledge about the influence of individual parameters in the SLM process on porosity will enable potential manufacturers to produce high quality components with desired properties.

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“…However, when the strain grew to a specific point, the storage energy of deformation increased, attended by dynamic softening, but work hardening was still the primary deformation phenomenon. The shape of the true stress–strain graph dropped and the graph became smooth and flat [ 31 , 32 , 33 ]. After passing the peak stress, the graphs showed a constant drop due to the presence of dynamic softening in the form of dynamic recrystallization (DRX) and dynamic recovery (DRV).…”

Section: Resultsmentioning

confidence: 99%

Hot Deformation Treatment of Grain-Modified Mg–Li Alloy

et al. 2020

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In this work, a systematic analysis of the hot deformation mechanism and a microstructure characterization of an as-cast single α-phase Mg–4.5 Li–1.5 Al alloy modified with 0.2% TiB addition, as a grain refiner, is presented. The optimized constitutive model and hot working terms of the Mg–Li alloy were also determined. The hot compression procedure of the Mg–4.5 Li–1.5 Al + 0.2 TiB alloy was performed using a DIL 805 A/D dilatometer at deformation temperatures from 250 °C to 400 °C and with strain rates of 0.01–1 s−1. The processing map adapted from a dynamic material model (DMM) of the as-cast alloy was developed through the superposition of the established instability map and power dissipation map. By considering the processing maps and microstructure characteristics, the processing window for the Mg–Li alloy were determined to be at the deformation temperature of 590 K–670 K and with a strain rate range of 0.01–0.02 s−1.

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Influence of Scanning Strategy Parameters on Residual Stress in the SLM Process According to the Bridge Curvature Method for AISI 316L Stainless Steel

Cited by 50 publications

References 19 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

Selective Laser Melting of 18NI-300 Maraging Steel

Hot Deformation Treatment of Grain-Modified Mg–Li Alloy

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