Simulation of annealing process on AISI 316 L stainless steel fabricated via laser powder bed fusion using finite element method with creep

Jin, Qing-Ye; Kang, Dongseok; Ha, Kyungsik; Yu, Jea Hyun; Lee, Wookjin

doi:10.1016/j.addma.2022.103255

Cited by 5 publications

(4 citation statements)

References 25 publications

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“…2 , the layer where the tip is located is completely laminated after fabricating all the In625 parts. During the lamination of the In625 part, the layer corresponding to the tip shrinks because of its solidification residual stress and that of the laminated layers above it [ 36 ]. Therefore, there is a gap between the two materials in this layer.…”

Section: Discussionmentioning

confidence: 99%

Design of dissimilar material joint for defect-free multi-material additive manufacturing via laser-directed energy deposition

Jin,

Nam,

et al. 2024

Heliyon

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Section: Discussionmentioning

confidence: 99%

Design of dissimilar material joint for defect-free multi-material additive manufacturing via laser-directed energy deposition

Jin,

Nam,

et al. 2024

Heliyon

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“…With this method, the residual stress in the cantilever can be evaluated by measuring the deformation, δ, occurring when cutting the legs. This method had been successfully applied to evaluate the residual stress of AISI 316L stainless steel made by LPBF, with and without post heat treatment [24]. Detailed information about the cantilever design, as well as the finite element simulation results of the residual stress state, can be found in the authors' previous work [24].…”

Section: Methodsmentioning

confidence: 99%

“…This method had been successfully applied to evaluate the residual stress of AISI 316L stainless steel made by LPBF, with and without post heat treatment [24]. Detailed information about the cantilever design, as well as the finite element simulation results of the residual stress state, can be found in the authors' previous work [24]. The cutting of the supporter legs was performed gently and slowly by an electric abrasive hand grinder.…”

Section: Methodsmentioning

confidence: 99%

“…When T = 0.5 mm, cutting the legs caused significant and gradually increasing downward distortions. This behavior is very interesting because, typically, the deformation of the cantilever occurs in an upward direction due to the tensile stress on the top and the compressive stress near the bottom, which are a general consequence of the thermal shrinkage of each layer [24,27,28]. In the case of T = 1.0 mm, the cantilever showed smaller but still significant downward deformations compared with T = 0.5 mm.…”

Section: Residual Stress In As-built Statementioning

confidence: 99%

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Influence of Several Heat Treatments on Residual Stress in Laser Powder Bed-Fused Maraging 18Ni-300 Steel

Jin

et al. 2023

Applied Sciences

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In laser powder bed fusion, process-inherited thermal residual stress is developed due to the thermal strain misfit between each layer. Detailed analysis and a prediction of the residual stress are needed because it can induce distortions of the components and, in some serious cases, stress-induced defects such as cracking. In this work, the effects of heat treatment conditions on residual stress in maraging 18Ni-300 steel, fabricated by laser powder bed fusion, were investigated. Cantilever-shaped specimens were used to experimentally analyze residual stress caused by the distortions of the specimens while cutting them from the supporters. The cantilever samples showed complex distortion behavior in the as-built state. They bent downward while cutting them from the supporter when the thickness was relatively thin, and the bending deformation became upward instead of downward with increasing thickness. Interpreting this behavior by finite element simulation showed that the downward bending was due to the compressive stress state at the top layer of the maraging steel. When the cantilever specimens were aging heat treated, the distortions were significantly reduced, implying that the process-inherited residual stress was diminished.

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Effects of heat source type and FE time discretization strategy on predicting temperature histories during laser direct energy deposition process of Fe-based alloys

Ha,

Shim,

Park

et al. 2023

Int J Adv Manuf Technol

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Simulation of annealing process on AISI 316 L stainless steel fabricated via laser powder bed fusion using finite element method with creep

Cited by 5 publications

References 25 publications

Design of dissimilar material joint for defect-free multi-material additive manufacturing via laser-directed energy deposition

Design of dissimilar material joint for defect-free multi-material additive manufacturing via laser-directed energy deposition

Influence of Several Heat Treatments on Residual Stress in Laser Powder Bed-Fused Maraging 18Ni-300 Steel

Effects of heat source type and FE time discretization strategy on predicting temperature histories during laser direct energy deposition process of Fe-based alloys

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