Laser Interaction with Surface in Powder Bed Melting Process and Its Impact on Temperature Profile, Bead and Melt Pool Geometry

Leila Ladani, Faiyaz Ahsan

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

1 Scopus citations

Abstract

Many researchers have focused on thermal, structural or other multiphysics modeling of laser and electron beam powder bed processes. However, in most cases, the laser heat source distribution is considered Gaussian as an ideal beam. However, power intensity distribution is a function of many parameters that need to be considered if realistic modeling of laser interaction with surface is desired. This work seeks to model the process in a more comprehensive and realistic manner by taking the laser physics into consideration including the wavelength, laser quality factor and laser beam parameter product. The model also uses a level set method to determine the shape of the bead and melt pool during melting and solidification process. Other physics including the heat transfer and fluid flow is incorporated in the simulation to model the whole process. This multiphysics process is used to model the melt pool geometry. Results are compared against an experiment for Inconel 718 alloy.

Original languageEnglish (US)
Title of host publicationTMS 2019 148th Annual Meeting and Exhibition Supplemental Proceedings
PublisherSpringer International Publishing
Pages319-329
Number of pages11
ISBN (Print)9783030058609
DOIs
StatePublished - 2019
Externally publishedYes
Event148th Annual Meeting and Exhibition of The Minerals, Metals and Materials Society, TMS 2019 - San Antonio, United States
Duration: Mar 10 2019Mar 14 2019

Publication series

NameMinerals, Metals and Materials Series
ISSN (Print)2367-1181
ISSN (Electronic)2367-1696

Conference

Conference148th Annual Meeting and Exhibition of The Minerals, Metals and Materials Society, TMS 2019
CountryUnited States
CitySan Antonio
Period3/10/193/14/19

Keywords

  • Level set
  • Melt pool
  • Non-Gaussian beams

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy Engineering and Power Technology
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Laser Interaction with Surface in Powder Bed Melting Process and Its Impact on Temperature Profile, Bead and Melt Pool Geometry'. Together they form a unique fingerprint.

Cite this