Physical characteristics of nanoscale niobium-zirconium alloy powder during 3D printing laser sintering process - A molecular dynamics study

Chao Chen Li, Chun Hsien Li, Shun Chang Lin, Yu Chen Su, Shan Jiang, Deng Maw Lu, Jian Ming Lu, Ming Hsiao Lee, Zhen Chen

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

4 Scopus citations

Abstract

In this present study, the physical characteristics of nanoscale niobium zirconium alloy powder applied on the powder bed fusion laser sintering is computed during 3D printing process by molecular dynamics simulation method with embedded atom method potential. There are three solid and hollow type powder sizes, which are 16a, 20a, and 24a, respectively. There are three solid and hollow type powder sizes, which are 16a, 20a, and 24a, respectively. Six combinations are created and laser-sintered under different heating rates (1K/ps, 0.5K/ps, and 0.25K/ps, respectively), and then the neck width, radius of gyration, structural change, potential energy, and root mean square displacement of nanoscale alloy powder are analyzed and discussed. It is found that nanoscale niobium zirconium alloy powder has the phenomena of spontaneous solid-state sintering at room temperature. It is observed that the temperature of solid state diffusion decrease with heating rate decreasing when powder size fixed, the temperature of solid state diffusion decrease with powder size decreasing when heating rate fixed also. Average coalescence temperature and melting temperature decrease with heating rate decreasing when powder size fixed, and they decrease with powder size decreasing when heating rate fixed also. It is mentioned that coalescence temperature of nanoscale niobium zirconium alloy powder is about 1250 to 1800K, and melting temperature of that is about 1250 to 1800K (The macroscopic melting of that point is 2070 K). Therefore, it is suggested that the power of laser beams could be lower during 3D printing process in order to heat nanoscale niobium zirconium alloy powder.

Original languageEnglish
Title of host publicationProceedings of 4th IEEE International Conference on Applied System Innovation 2018, ICASI 2018
EditorsArtde Donald Kin-Tak Lam, Stephen D. Prior, Teen-Hang Meen
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1322-1325
Number of pages4
ISBN (Electronic)9781538643426
DOIs
StatePublished - 22 Jun 2018
Event4th IEEE International Conference on Applied System Innovation, ICASI 2018 - Chiba, Japan
Duration: 13 Apr 201817 Apr 2018

Publication series

NameProceedings of 4th IEEE International Conference on Applied System Innovation 2018, ICASI 2018

Conference

Conference4th IEEE International Conference on Applied System Innovation, ICASI 2018
Country/TerritoryJapan
CityChiba
Period13/04/1817/04/18

Keywords

  • 3D Printing
  • Laser Sintering
  • Molecular Dynamics
  • Nanoscale Alloy Powder

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