0
TECHNICAL PAPERS

Three-Dimensional Modeling of Laser Sintering of a Two-Component Metal Powder Layer on Top of Sintered Layers

[+] Author and Article Information
Tiebing Chen

Department of Mechanical and Aerospace Engineering, University of Missouri-Columbia, Columbia, MO 65211

Yuwen Zhang1

Department of Mechanical and Aerospace Engineering, University of Missouri-Columbia, Columbia, MO 65211zhangyu@missouri.edu

1

Corresponding author.

J. Manuf. Sci. Eng 129(3), 575-582 (Dec 18, 2006) (8 pages) doi:10.1115/1.2716714 History: Received May 12, 2006; Revised December 18, 2006

A three-dimensional model of selective laser sintering of a two-component loose metal powder layer on top of previously sintered layers by a single-line laser scanning is presented. A temperature-transforming model is employed to model melting and resolidification accompanied by partial shrinkage during laser sintering. The heat losses at the top surface due to natural convection and radiation are taken into account. The liquid flow of the molten low-melting-point metal powders, which is driven by capillary and gravity forces, is also considered and formulated by using Darcy’s law. The effects of the dominant processing parameters, such as laser-beam intensity, scanning velocity, and number of the existing sintered layers underneath, are investigated.

FIGURES IN THIS ARTICLE
<>
Copyright © 2007 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 2

Three-dimensional shape of the HAZ (Δs=0.25, Ub=0.1, Ni=0.3198, N=1)

Grahic Jump Location
Figure 3

Temperature distribution at the surface of the powder layer (Δs=0.25, Ub=0.1, Ni=0.3198, φg,ℓ=0.2, N=1)

Grahic Jump Location
Figure 4

Effects of laser intensity and scanning velocity on the sintering process (φg,ℓ=0.0, N=1)

Grahic Jump Location
Figure 5

Effects of laser intensity and scanning velocity on the sintering process (φg,ℓ=0.2, N=1)

Grahic Jump Location
Figure 6

Effects of laser intensity and scanning velocity on the sintering process (φg,ℓ=0.42, N=1)

Grahic Jump Location
Figure 7

Effects of laser intensity and scanning velocity on the sintering process (φg,ℓ=0.0, N=3)

Grahic Jump Location
Figure 8

Effects of laser intensity and scanning velocity on the sintering process (φg,ℓ=0.42, N=3)

Grahic Jump Location
Figure 9

Effects of laser intensity and scanning velocity on the sintering process (φg,ℓ=0.42, N=3)

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In