Experimental investigation of laser scan strategy on the microstructure and properties of Inconel 718 parts fabricated by laser powder bed fusion

Ravichander, Bharath Bhushan; Mamidi, Kiriti; Rajendran, Vignesh Ram Kumar; Farhang, Behzad; Ganesh-Ram, Aditya; Hanumantha, M.; Moghaddam, Narges Shayesteh; Amerinatanzi, Amirhesam

doi:10.1016/j.matchar.2022.111765

Cited by 42 publications

(11 citation statements)

References 41 publications

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“…At present, 316L stainless steel and Inconel 718 nickel superalloy are the most commonly used materials in additive manufacturing. The mechanical properties of SLM-processed 316L steel and Inconel 718 alloy have been extensively researched [ 6 , 8 , 14 , 18 , 19 ]. Studying the interaction of such materials with hydrogen is a new attractive research field [ 20 , 21 , 22 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Hydrogen on the Structure and Mechanical Properties of 316L Steel and Inconel 718 Alloy Processed by Selective Laser Melting

Maksimkin¹,

Yukhimchuk²,

Malkov³

et al. 2022

Materials

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The interaction of hydrogen with specimens of 316L steel and Inconel 718 alloy processed by selective laser melting (SLM) was studied. The effect of hydrogen on the mechanical properties of SLM materials, hydrogen permeability, and microstructure was investigated; besides, these values were compared with the properties of conventionally produced materials. It was shown that SLM can be successfully used to produce parts for operation in hydrogen environments at high pressure at room temperature.

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Section: Introductionmentioning

confidence: 99%

Effect of Hydrogen on the Structure and Mechanical Properties of 316L Steel and Inconel 718 Alloy Processed by Selective Laser Melting

Maksimkin¹,

Yukhimchuk²,

Malkov³

et al. 2022

Materials

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“…Liu et al [32] studied the effects of two scanning strategies (single-directional scanning and cross-directional scanning) on the solidification structure and crystallographic texture of SLM-manufactured IN718 alloy. Ravichander et al [33] identified the effect of scan strategy on residual stress and studied the metallurgical interactions between the mechanical and microstructural properties within the IN718 superalloy. Wang et al [34] optimized the process parameters for selective laser melting of Inconel 718 and further established the relationship equation between the relative density of SLMed samples and the energy density coupled by laser parameters.…”

Section: Introductionmentioning

confidence: 99%

Effect of Laser Energy Density on the Microstructure and Microhardness of Inconel 718 Alloy Fabricated by Selective Laser Melting

Niu

et al. 2022

Crystals

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This work focused on the effects of laser energy density on the relative density, microstructure, and microhardness of Inconel 718 alloy manufactured by selective laser melting (SLM). The microstructural architectures, element segregation behavior in the interdendritic region and the evolution of laves phases of the as-SLMed IN718 samples were analyzed by optical metallography (OM), scanning electron microscopy (SEM), energy dispersive spectrometer (EDS), and electron probe microanalysis (EPMA). The results show that with an increase in the laser volume energy density, the relative density and the microhardness firstly increased and then decreased slightly. It also facilitates the precipitation of Laves phase. The variation of mechanical properties of the alloy can be related to the densification degree, microstructure uniformity, and precipitation phase content of Inconel 718 alloy.

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“…The above-mentioned process parameters were suggested by the manufacturer SLM solutions Group AG. The energy density ( E v ) used during the fabrication process is 69.45 J/mm 3 , which is calculated as [ 10 , 13 , 36 ]:

…”

Section: Fabrication and Experimental Proceduresmentioning

confidence: 99%

“…The TPMS structures are used as shock absorbers in spacecrafts and high-speed trains due to their high energy absorption capabilities [ 5 , 6 ]. LPBF is one of the most widely used metal AM techniques to fabricate complex metal TPMS structures with high accuracy [ 7 , 8 , 9 , 10 , 11 ]. The LPBF is a layer-by-layer manufacturing process in which the laser beam selectively melts and joins the metal powder layers until the desired part is fabricated [ 11 , 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

Surface Morphology, Compressive Behavior, and Energy Absorption of Graded Triply Periodic Minimal Surface 316L Steel Cellular Structures Fabricated by Laser Powder Bed Fusion

2022

Self Cite

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Laser powder bed fusion (LPBF) is an emerging technique for the fabrication of triply periodic minimal surface (TPMS) structures in metals. In this work, different TPMS structures such as Diamond, Gyroid, Primitive, Neovius, and Fisher–Koch S with graded relative densities are fabricated from 316L steel using LPBF. The graded TPMS samples are subjected to sandblasting to improve the surface finish before mechanical testing. Quasi-static compression tests are performed to study the deformation behavior and energy absorption capacity of TPMS structures. The results reveal superior stiffness and energy absorption capabilities for the graded TPMS samples compared to the uniform TPMS structures. The Fisher–Koch S and Primitive samples show higher strength whereas the Fisher–Koch S and Neovius samples exhibit higher elastic modulus. The Neovius type structure shows the highest energy absorption up to 50% strain among all the TPMS structures. The Gibson–Ashby coefficients are calculated for the TPMS structures, and it is found that the C2 values are in the range suggested by Gibson and Ashby while C1 values differ from the proposed range.

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Experimental investigation of laser scan strategy on the microstructure and properties of Inconel 718 parts fabricated by laser powder bed fusion

Cited by 42 publications

References 41 publications

Effect of Hydrogen on the Structure and Mechanical Properties of 316L Steel and Inconel 718 Alloy Processed by Selective Laser Melting

Effect of Hydrogen on the Structure and Mechanical Properties of 316L Steel and Inconel 718 Alloy Processed by Selective Laser Melting

Effect of Laser Energy Density on the Microstructure and Microhardness of Inconel 718 Alloy Fabricated by Selective Laser Melting

Surface Morphology, Compressive Behavior, and Energy Absorption of Graded Triply Periodic Minimal Surface 316L Steel Cellular Structures Fabricated by Laser Powder Bed Fusion

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