Parameter optimization of the high-power laser powder bed fusion process for H13 tool steel

Yonehara, Makiko; Ikeshoji, Toshi-Taka; Nagahama, Takaya; Mizoguchi, Takahiro; Tano, Makoto; Yoshimi, Takayuki; Kyogoku, Hideki

doi:10.1007/s00170-020-05879-6

Cited by 23 publications

(10 citation statements)

References 38 publications

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“…This result was similar to that of Inconel 718 obtained previously [47]. The relationship between fabrication condition and defects was reported using a process map in terms of laser power and scan speed [47,48,[51][52][53]. The representative microstructure of (a), (b), and (c) presented in Figure 5 can be explained as follows.…”

Section: Density-based Process Map In Terms Of Laser Power and Scan Speedsupporting

confidence: 85%

“…A large pore existed in the microstructure of the specimen fabricated at E = 333 J/mm 3 (c). The effect of energy density on the density of specimens was investigated previously [44,[46][47][48], and a similar tendency reported.…”

Section: Investigation Of Process Parameters By Fabrication Of Cubic Specimenssupporting

confidence: 66%

“…The (volumetric) energy density, E, which is one of the important process parameters, affects the microstructure remarkably, for instance, grain size and grain growth. The increase in energy density results in grain growth direction aligned with build direction [41][42][43][44][45] and decreased porosity [44,[46][47][48]. However, the energy density poorly predicts the melt pool behavior, as reported as a limitation of energy density as a process parameter, according to Bertoli et al [49,50].…”

Section: Introductionmentioning

confidence: 99%

“…However, the energy density poorly predicts the melt pool behavior, as reported as a limitation of energy density as a process parameter, according to Bertoli et al [49,50]. Therefore, practically, laser power and scan speed, which are the main process parameters, are applied to fabricate sound parts and are determined using a process map [47,48,[51][52][53]. The authors reported on the creation of process maps in various alloys [47,48].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, practically, laser power and scan speed, which are the main process parameters, are applied to fabricate sound parts and are determined using a process map [47,48,[51][52][53]. The authors reported on the creation of process maps in various alloys [47,48].…”

Section: Introductionmentioning

confidence: 99%

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Influences of Process Parameters on the Microstructure and Mechanical Properties of CoCrFeNiTi Based High-Entropy Alloy in a Laser Powder Bed Fusion Process

et al. 2021

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Recently, high-entropy alloys (HEAs) have attracted much attention because of their superior properties, such as high strength and corrosion resistance. This study aimed to investigate the influences of process parameters on the microstructure and mechanical properties of CoCrFe NiTiMo HEAs using a laser-based powder bed fusion (LPBF) process. In terms of laser power and scan speed, a process map was constructed by evaluating the density and surface roughness of the as-built specimen to optimize the process parameters of the products. The mechanical properties of the as-built specimens fabricated at the optimum fabrication condition derived from the process map were evaluated. Consequently, the optimum laser power and scan speed could be obtained using the process map evaluated by density and surface roughness. The as-built specimen fabricated at the optimum fabrication condition presented a relative density of more than 99.8%. The microstructure of the as-built specimen exhibited anisotropy along the build direction. The tensile strength and elongation of the as-built specimen were around 1150 MPa and more than 20%, respectively.

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Section: Density-based Process Map In Terms Of Laser Power and Scan Speedsupporting

confidence: 85%

Section: Investigation Of Process Parameters By Fabrication Of Cubic Specimenssupporting

confidence: 66%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Influences of Process Parameters on the Microstructure and Mechanical Properties of CoCrFeNiTi Based High-Entropy Alloy in a Laser Powder Bed Fusion Process

et al. 2021

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Toward the Direct Synthesis of HDPE Powders for Powder Bed Fusion Based Additive Manufacturing

Wencke¹,

Proes

Imgrund

et al. 2021

Macro Materials & Eng

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Powder bed fusion (PBF) suitable polyethylene particles are targeted by means of a direct synthesis, using a bisimino pyridine iron catalyst (BIP FeCl 2 ) supported on microsized silica particles. An active support is generated by treating spray dried silica microparticles with a methyl aluminoxane activated BIP FeCl 2 catalyst in toluene. Semibatch ethylene polymerization is mapped with respect to pressure, temperature, and reaction time to find optimal reaction parameters. The optimized synthesis leads to round polyethylene particles with a median size of ≈50 μm which have a sinter window of 8-15 °C and an unconfined yield stress (ffc) of 1.5 in a ring shear tester. The Young modulus of injection molded samples is in the range of 150-250 Pa with an elongation at break of about 30%. The powder flowability is improved by coating with nanosilica powder to an ffc of 3.8. Additivitation with carbon black allows to laser sinter the powder to solid parts in a small scale adapted setup for selective laser sintering (PBF/laser beam (LB)/P). Severe caking is preventing the preparation of CAD model conform parts. Commercial HDPE powder for PBF is additivated the same way to give substantially solid built parts, but with similar caking.

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Laser powder bed fusion of the steels used in the plastic injection mould industry: a review of the influence of processing parameters on the final properties

Cunha

Marques

Silva

et al. 2022

Int J Adv Manuf Technol

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Parameter optimization of the high-power laser powder bed fusion process for H13 tool steel

Cited by 23 publications

References 38 publications

Influences of Process Parameters on the Microstructure and Mechanical Properties of CoCrFeNiTi Based High-Entropy Alloy in a Laser Powder Bed Fusion Process

Influences of Process Parameters on the Microstructure and Mechanical Properties of CoCrFeNiTi Based High-Entropy Alloy in a Laser Powder Bed Fusion Process

Toward the Direct Synthesis of HDPE Powders for Powder Bed Fusion Based Additive Manufacturing

Laser powder bed fusion of the steels used in the plastic injection mould industry: a review of the influence of processing parameters on the final properties

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