Design of laser parameters for selectively laser melted maraging steel based on deposited energy density

Suzuki, Asuka; Nishida, Ryoya; Takata, Naoki; Kobashi, Makoto; Kato, Masaki

doi:10.1016/j.addma.2019.04.018

Cited by 33 publications

(26 citation statements)

References 31 publications

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“…It is well known in the field of additive manufacturing that it is very important to choose appropriate process parameters, which can improve the density of materials. To obtain 15‐5PH stainless steel with high strength and good corrosion resistance, it is necessary to study the effects of manufacturing defects on mechanical properties and corrosion resistance (Figure ) . According to a previous study, Haynes suggested that the cavity had a relatively small effect on tensile strength, which is consistent with the tensile results of 15‐5PH stainless steel.…”

Section: Discussionsupporting

confidence: 53%

“…Molten line distribution and manufacturing defects related to solidification processes, heat treatment, and stress distribution are often complicated, which is obviously related to the “energy input.” Energy density is defined as the energy input per unit volume (mm 3 ) and is always calculated using Equation

E = \frac{P}{V d h}

where E is the energy input per unit volume, P is the laser power, V is the scanning speed, and d and h are the thickness and diameter of the laser layer, respectively . It is very important to select appropriate processing parameters for selective laser‐melted metals with perfect microstructural, good mechanical properties, and corrosion resistance …”

Section: Introductionmentioning

confidence: 99%

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Effect of Manufacturing Parameters on the Mechanical and Corrosion Behavior of Selective Laser‐Melted 15‐5PH Stainless Steel

Wang

Dong

Kong

et al. 2019

steel research int.

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The effect of manufacturing parameters on mechanical and corrosion resistance is investigated using tensile tests and electrochemical experiments for selective laser-melted 15-5PH stainless steel. The results demonstrate that when laser power is decreased to 150 W and scanning speed increased to 1400 mm s À1 , manufacturing defects increase. Plasticity and corrosion resistance reduce significantly. Cracks mainly originate from manufacturing defects and extend along the interface between molten pools. Corrosion occurs near manufacturing defects. Finally, the most suitable laser energy density is 130 J mm À3 for 15-5PH stainless steel.

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Section: Discussionsupporting

confidence: 53%

E = \frac{P}{V d h}

Section: Introductionmentioning

confidence: 99%

Effect of Manufacturing Parameters on the Mechanical and Corrosion Behavior of Selective Laser‐Melted 15‐5PH Stainless Steel

Wang

Dong

Kong

et al. 2019

steel research int.

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“…The density (g•cm -3 ) of L-PBF-built sample was measured at ambient temperature using the Archimedes method [34]. Its relative density was determined against the measured density of Al-15%Fe alloy ingot as a reference.…”

Section: Methodsmentioning

confidence: 99%

“…An extensive body of literature exists regarding the effect of L-PBF process parameters on the relative density of manufactured metal and alloy samples [16][17][18]20,24,27,30,34,49]. The volumetric energy density (E) [34,50] has been widely used to integrate various L-PBF processing parameters of P, v, hatch distance between adjacent laser scanning tracks (h), and powder layer thickness (t):…”

Section: Optimization Of Laser Parameters For Densificationmentioning

confidence: 99%

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Processability and Optimization of Laser Parameters for Densification of Hypereutectic Al–Fe Binary Alloy Manufactured by Laser Powder Bed Fusion

et al. 2021

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Centimeter-sized samples of hypereutectic Al–15 mass% Fe alloy were manufactured by a laser powder bed fusion (L-PBF) process while systematically varying laser power (P) and scan speed (v). The effects on relative density and melt pool depth of L-PBF-manufactured samples were investigated. In comparison with other Al alloys, a small laser process window of P = 77–128 W and v = 0.4–0.8 ms−1 was found for manufacturing macroscopically crack-free samples. A higher v and P led to the creation of macroscopic cracks propagating parallel to the powder-bed plane. These cracks preferentially propagated along the melt pool boundaries decorated with brittle θ-Al13Fe4 phase, resulting in low L-PBF processability of Al–15%Fe alloy. The deposited energy density model (using P·v−1/2) would be useful for identifying the optimum L-PBF process conditions towards densification of Al–15%Fe alloy samples, in comparison with the volumetric energy density (using P·v−1), however, the validity of the model was reduced for this alloy in comparison with other alloys with high thermal conductivities. This is likely due to inhomogeneous microstructures having numerous coarsened θ–Al13Fe4 phases localized at melt pool boundaries. These results provide insights into achieving sufficient L-PBF processability for manufacturing dense Al–Fe binary alloy samples.

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Multiaxial Fatigue Behaviour of SLM 18Ni300 Steel

Branco

Costa

Ferreira

et al. 2022

Structural Integrity

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Design of laser parameters for selectively laser melted maraging steel based on deposited energy density

Cited by 33 publications

References 31 publications

Effect of Manufacturing Parameters on the Mechanical and Corrosion Behavior of Selective Laser‐Melted 15‐5PH Stainless Steel

Effect of Manufacturing Parameters on the Mechanical and Corrosion Behavior of Selective Laser‐Melted 15‐5PH Stainless Steel

Processability and Optimization of Laser Parameters for Densification of Hypereutectic Al–Fe Binary Alloy Manufactured by Laser Powder Bed Fusion

Multiaxial Fatigue Behaviour of SLM 18Ni300 Steel

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