Abstract
Selective laser melting (SLM) has received increasing attention in recent years as an innovative manufacturing technique. The present SLM process only uses a single laser beam to melt and consolidate the powder, which may result in excessive evaporation. In this paper, a double beam scanning strategy is investigated in which the first laser beam preheats the powder just below the sintering point while the second laser beam completely melts the powder. An analytical solution on the temperature distribution heated by a moving laser beam in the powder-bulk domain is derived and is used to determine the critical radius of the first laser beam. The single and double beam scanning strategies are compared numerically and it is found that double beam scanning can effectively reduce material evaporation and increase the amount of powder melted in the SLM process.
Issue Section:
Melting and Solidification
References
1.
Roberson
, D.
, Espalin
, D.
, and Wicker
, R.
, 2013
, “3D Printer Selection: A Decision-Making Evaluation and Ranking Model
,” Virtual Phys. Prototyping
, 8
(3
), pp. 201
–212
.2.
Gu
, D.
, and Zhang
, G.
, 2013
, “Selective Laser Melting of Novel Nanocomposites Parts With Enhanced Tribological Performance: Nanocrystalline TiC/Ti Nanocomposites Parts Were Built Via SLM Technology and the Densification, Microstructures, Microhardness and Tribological Performance Were Investigated
,” Virtual Phys. Prototyping
, 8
(1
), pp. 11
–18
.3.
Wen
, S.
, Yan
, C.
, Wei
, Q.
, Zhang
, L.
, Zhao
, X.
, Zhu
, W.
, and Shi
, Y.
, 2014
, “Investigation and Development of Large-Scale Equipment and High Performance Materials for Powder Bed Laser Fusion Additive Manufacturing
,” Virtual Phys. Prototyping
, 9
(4
), pp. 213
–223
.4.
Chua
, C. K.
, Leong
, K. F.
, and Lim
, C. S.
, 2010
, Rapid Prototyping: Principles and Applications
, World Scientific
, Singapore
.5.
Vaezi
, M.
, Chianrabutra
, S.
, Mellor
, B.
, and Yang
, S.
, 2013
, “Multiple Material Additive Manufacturing—Part 1: A Review
,” Virtual Phys. Prototyping
, 8
(1
), pp. 19
–50
.6.
Jardini
, A. L.
, Larosa
, M. A.
, de Carvalho Zavaglia
, C. A.
, Bernardes
, L. F.
, Lambert
, C. S.
, Kharmandayan
, P.
, Calderoni
, D.
, and Maciel Filho
, R.
, 2014
, “Customised Titanium Implant Fabricated in Additive Manufacturing for Craniomaxillofacial Surgery
,” Virtual Phys. Prototyping
, 9
(2
), pp. 115
–125
.7.
Loh
, L.-E.
, Chua
, C.-K.
, Yeong
, W.-Y.
, Song
, J.
, Mapar
, M.
, Sing
, S.-L.
, Liu
, Z.-H.
, and Zhang
, D.-Q.
, 2015
, “Numerical Investigation and an Effective Modelling on the Selective Laser Melting (SLM) Process With Aluminium Alloy 6061
,” Int. J. Heat Mass Transfer
, 80
, pp. 288
–300
.8.
Loh
, L. E.
, Liu
, Z. H.
, Zhang
, D. Q.
, Mapar
, M.
, Sing
, S. L.
, Chua
, C. K.
, and Yeong
, W. Y.
, 2014
, “Selective Laser Melting of Aluminium Alloy Using a Uniform Beam Profile
,” Virtual Phys. Prototyping
, 9
(1
), pp. 11
–16
.9.
Zhang
, D.
, Liu
, Z.
, and Chua
, C.
, 2013
, “Investigation on Forming Process of Copper Alloys Via Selective Laser Melting
,” High Value Manufacturing: Advanced Research in Virtual and Rapid Prototyping: Sixth International Conference on Advanced Research in Virtual and Rapid Prototyping
, Leiria, Portugal, Oct. 1–5, pp. 285
–289
.10.
Gu
, D.
, and Shen
, Y.
, 2009
, “Balling Phenomena in Direct Laser Sintering of Stainless Steel Powder: Metallurgical Mechanisms and Control Methods
,” Mater. Des.
, 30
(8
), pp. 2903
–2910
.11.
Liu
, Z.
, Chua
, C.
, Leong
, K.
, Kempen
, K.
, Thijs
, L.
, Yasa
, E.
, Van-Humbeeck
, J.
, and Kruth
, J.
, 2011
, “A Preliminary Investigation on Selective Laser Melting of M2 High Speed Steel
,” Innovative Developments in Virtual and Physical Prototyping: Fifth International Conference on Advanced Research in Virtual and Rapid Prototyping
(VRAP
), Leiria, Portugal, Sept. 28–Oct. 1, pp. 339
–346
.https://lirias.kuleuven.be/handle/123456789/31076212.
Abe
, F.
, Osakada
, K.
, Shiomi
, M.
, Uematsu
, K.
, and Matsumoto
, M.
, 2001
, “The Manufacturing of Hard Tools From Metallic Powders by Selective Laser Melting
,” J. Mater. Process. Technol.
, 111
(1–3
), pp. 210
–213
.13.
Woo
, H.
, and Cho
, H.
, 1999
, “Three-Dimensional Temperature Distribution in Laser Surface Hardening Processes
,” Proc. Inst. Mech. Eng., Part B: J. Eng. Manuf.
, 213
(7
), pp. 695
–712
.14.
Stephenson
, D.
, Jen
, T.-C.
, and Lavine
, A.
, 1997
, “Cutting Tool Temperatures in Contour Turning: Transient Analysis and Experimental Verification
,” ASME J. Manuf. Sci. Eng.
, 119
(4A
), pp. 494
–501
.15.
Araya
, G.
, and Gutierrez
, G.
, 2006
, “Analytical Solution for a Transient, Three-Dimensional Temperature Distribution Due to a Moving Laser Beam
,” Int. J. Heat Mass Transfer
, 49
(21–22
), pp. 4124
–4131
.16.
Palmer
, J. R.
, 1995
, High Power Laser Optics
, Pro Se Publishing
, San Diego, CA
.17.
Taylor
, R. E.
, Groot
, H.
, Goerz
, T.
, Ferrier
, J.
, and Taylor
, D. L.
, 1998
, “Thermophysical Properties of Molten Aluminium Alloys
,” High Temp.-High Pressures
, 30
(3
), pp. 269
–276
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