Continuum Modeling of the Densification of W-Ni-Fe during Selective Laser Sintering

West, Connor

doi:10.15368/theses.2016.52

Cited by 1 publication

(2 citation statements)

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“…Previous studies assumed different specific heat values for one bulk material, that is, 51.8% of one bulk. 24,34,37 In this study, the specific heat values for the powder bed were assumed as 100%, 75%, and 50% of the specific heat of bulk as expressed in equation 11C p, powder = b 3 C p, bulk ð11Þ…”

Section: Model Descriptionmentioning

confidence: 99%

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Analysis on selective laser melting of WC-reinforced H13 steel composite powder by finite element method

Woo

Hwang

et al. 2019

Advances in Mechanical Engineering

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A three-dimensional finite element model for the selective laser melting process was developed to analyze the melting behavior of WC-reinforced H13 steel composite powder. In this model, convection and radiation on the external surface during laser irradiation were considered, and moving Gaussian heat flux was assumed in the thermal model. The molten pool geometry based on the simulated temperature distributions was investigated for various parameters such as distribution factor, packing efficiency, absorption coefficient, and specific heat factor. The input values of density, conductivity, and specific heat were obtained from the rule of mixture, and absorption coefficients were experimentally determined at given mixing ratios of WC and H13 steel. The simulation results showed that the relative fractions of WC and H13 steel powder significantly affect molten pool geometry. In terms of point-of-process parameters, the distribution factor, packing efficiency, and absorption coefficient are the main parameters that control molten pool geometry.

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Section: Model Descriptionmentioning

confidence: 99%

“…Density. As the powder bed is considered to be a mixture of solid and gas phases, the density of loose powder is presented as simply equation ( 9) 23,34 r powder = r bulk 3 e p , e p = 1…”

Section: Model Descriptionmentioning

confidence: 99%

Analysis on selective laser melting of WC-reinforced H13 steel composite powder by finite element method

Woo

Hwang

et al. 2019

Advances in Mechanical Engineering

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show abstract

Continuum Modeling of the Densification of W-Ni-Fe during Selective Laser Sintering

Abstract: present. Thus, it can be concluded that the P/v parameters used within the laser recipe has a direct relation to the resulting relative density of the SLS part.

Cited by 1 publication

References 19 publications

Analysis on selective laser melting of WC-reinforced H13 steel composite powder by finite element method

Analysis on selective laser melting of WC-reinforced H13 steel composite powder by finite element method

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