Numerical Simulation of Direct Metal Laser Sintering of Single-Component Powder on Top of Sintered Layers
- 8 July 2008
- journal article
- research article
- Published by ASME International in Journal of Manufacturing Science and Engineering
- Vol. 130 (4) , 041002
- https://doi.org/10.1115/1.2951948
Abstract
A three-dimensional model describing melting and resolidification of direct metal laser sintering of loose powders on top of sintered layers with a moving Gaussian laser beam is developed. Natural convection in the liquid pool driven by buoyancy and Marangoni effects is taken into account. A temperature transforming model is employed to model melting and resolidification in the laser sintering process. The continuity, momentum, and energy equations are solved using a finite volume method. The effects of dominant processing parameters including number of the existing sintered layers underneath, laser scanning velocity, and initial porosity on the sintering process are investigated.Keywords
This publication has 23 references indexed in Scilit:
- A three-dimensional numerical model for a convection–diffusion phase change process during laser melting of ceramic materialsInternational Journal of Heat and Mass Transfer, 2004
- The production of copper parts using DMLRRapid Prototyping Journal, 2003
- Comparison of volumetric and surface heating sources in the modeling of laser melting of ceramic materialsInternational Journal of Heat and Mass Transfer, 2003
- Selective laser sintering of single‐ and two‐component metal powdersRapid Prototyping Journal, 2003
- Melting of a subcooled mixed powder bed with constant heat flux heatingInternational Journal of Heat and Mass Transfer, 1999
- Direct laser freeform fabrication of high performance metal componentsRapid Prototyping Journal, 1998
- EFFECT OF VARIOUS DRIVING FORCES ON HEAT AND MASS TRANSFER IN ARC WELDINGNumerical Heat Transfer, Part A: Applications, 1997
- Direct selective laser sintering of metalsRapid Prototyping Journal, 1995
- A Numerical Analysis of Phase-Change Problems Including Natural ConvectionJournal of Heat Transfer, 1990
- Thermal conductivity of packed metal powdersInternational Journal of Heat and Mass Transfer, 1986