TY - GEN
T1 - Surface formation mechanisms in selective laser melting of cobalt-chromium-molybdenum powder
AU - Saprykin, null
AU - Sharkeev, Yu P.
AU - Saprykina, N.
AU - Ibragimov, E. A.
N1 - Funding Information:
?The reported study was funded by RFBR and Tomsk region according to the research project ?19-48-700022?.
Publisher Copyright:
© 2020 Trans Tech Publications Ltd, Switzerland.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020
Y1 - 2020
N2 - 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.
AB - 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.
KW - Coagulation
KW - Cobalt-chromium-molybdenum
KW - Melting conditions
KW - Quality
KW - Selective laser melting
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UR - http://www.scopus.com/inward/citedby.url?scp=85088211416&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/KEM.839.73
DO - 10.4028/www.scientific.net/KEM.839.73
M3 - Conference contribution
AN - SCOPUS:85088211416
SN - 9783035716764
T3 - Key Engineering Materials
SP - 73
EP - 78
BT - Problems and Prospects for the Development of Materials Science
A2 - Saprykin, Alexander
PB - Trans Tech Publications Ltd
T2 - International Scientific and Practical Conference on Materials Science, Mechanical Engineering and Energy: Problems and Prospects for Development, MSMEE 2019
Y2 - 27 June 2019 through 28 June 2019
ER -