Surface formation mechanisms in selective laser melting of cobalt-chromium-molybdenum powder

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

Abstract

Selective laser melting (SLM) is a manufacturing technology of metal parts of any shapes with target mechanical properties by means of laser melting. This paper discusses the effect of SLM parameters: laser output power, laser movement velocity, scanning pitch and preheating temperature of a powdered material on surface formation mechanism, namely, its physical configuration when melting cobalt-chromium-molybdenum powdered material Со28Cr3Mo. The study points at structural differences of melted surfaces even under identical process parameters. Several types of surface formation are identified, e.g. homogenous melt, coagulated particles, and shapeless particles. Vapor pressure, Marangoni effect, and heat effect of a melted powder are stated to be key reasons for rough surface. This research is of high importance for understanding the effect of SLM parameters on formation of a target quality surface, positive stability and repeatable accuracy of the process.

Original languageEnglish
Title of host publicationProblems and Prospects for the Development of Materials Science
EditorsAlexander Saprykin
PublisherTrans Tech Publications Ltd
Pages73-78
Number of pages6
ISBN (Print)9783035716764
DOIs
Publication statusPublished - 2020
EventInternational Scientific and Practical Conference on Materials Science, Mechanical Engineering and Energy: Problems and Prospects for Development, MSMEE 2019 - Barnaul, Russian Federation
Duration: 27 Jun 201928 Jun 2019

Publication series

NameKey Engineering Materials
Volume839 KEM
ISSN (Print)1013-9826
ISSN (Electronic)1662-9795

Conference

ConferenceInternational Scientific and Practical Conference on Materials Science, Mechanical Engineering and Energy: Problems and Prospects for Development, MSMEE 2019
CountryRussian Federation
CityBarnaul
Period27.6.1928.6.19

Keywords

  • Coagulation
  • Cobalt-chromium-molybdenum
  • Melting conditions
  • Quality
  • Selective laser melting

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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