Particle scale numerical modelling of heat transfer and melt pool dynamics in selective laser melting

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther

Abstract

Selective laser melting (SLM), with the advantages in producing complex geometry, is becoming one of the most promising additive manufacturing (AM) technologies [1]. In order to understand the multiple physical phenomena which is crucial for successful manufacturing during SLM process, different computational models that are less expensive but challenging compared with experiments and real-time monitor technologies have been developed in the past years. In order to investigate particle scale thermal-physical phenomena in SLM process, a three-dimensional model considering Fresnel reflection is developed to and the volume of fluid approach is used to track melting and solidification phenomena. Numerical results show that the melt track is broken into several regions to minimize surface energy because of surface tension. The molten liquid tends to flow outwards from the laser spot caused by Marangoni effects. The solidified surface of multiple particle diameter powders is much rougher compared with powder bed with layer thickness of one particle diameter. The developed model provides a comprehensive understanding about physical phenomena during SLM process.

Original languageEnglish
Title of host publication2nd International Conference on Simulation for Additive Manufacturing, Sim-AM 2019
EditorsFerdinando Auricchio, E. Rank, P. Steinmann, S. Kollmannsberger, Simone Morganti
PublisherInternational Center for Numerical Methods in Engineering (CIMNE)
Pages309-315
Number of pages7
ISBN (Electronic)9788494919480
Publication statusPublished - 2019
EventInternational Conference on Simulation for Additive Manufacturing 2019 - Pavia, Italy
Duration: 11 Sep 201913 Sep 2019
Conference number: 2nd
http://congress.cimne.com/sim-am2019/frontal/default.asp (Website)

Conference

ConferenceInternational Conference on Simulation for Additive Manufacturing 2019
Abbreviated titleSim-AM 2019
CountryItaly
CityPavia
Period11/09/1913/09/19
Internet address

Keywords

  • Additive Manufacturing
  • Fresnel Reflection
  • Powder Scale Modelling
  • Selective Laser Melting
  • Thermal Multiphase Flow and Solidification

Cite this