Journal ArticleDOI
Selective laser sintering of single‐ and two‐component metal powders
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In this paper, a comparative characterisation of selective laser sintering (SLS) mechanisms of single and two-component powders is presented, where the effects of the volume fraction of liquid phase and powder absorptance were discussed.Abstract:
A comparative characterisation of selective laser sintering (SLS) mechanisms of single‐ and two‐component powders is presented The effects of the volume fraction of liquid phase and the powder absorptance were discussed Single‐component Ni‐alloy, Fe and Cu powders as well as two‐component powder systems based on Ni‐alloy, Fe and Cu were investigated In particular, the following types of two‐component powder systems were studied: Ni‐alloy‐Cu and Fe‐Cu powder mixtures as well as Cu‐coated Ni‐alloy powder and Cu‐coated Fe powders SLS experiments were performed with a CW‐ Nd:YAG laser (λ=106 μm) The acting mechanism in all cases was liquid phase sinteringread more
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Journal ArticleDOI
Partial Melting and Resolidification of Metal Powder in Selective Laser Sintering
Bin Xiao,Yuwen Zhang +1 more
TL;DR: In this paper, a Gaussian laser beam is used for partial melting and resolidification of a single-component metal powder bed with the consideration of shrinkage, and the convection driven by capillary and gravity forces in the melting liquid pool is formulated by using Darcy's law.
Journal ArticleDOI
The role of La 2 O 3 in direct laser sintering of submicrometre WC Co p /Cu MMCs
Dongdong Gu,Yifu Shen +1 more
TL;DR: In this paper, the influence of rare earth (RE) oxide (La2O3) addition on densification and microstructure of direct laser sintered submicrometre WC-Cop/Cu metal matrix composites (MMCs) possessing 50.0 wt% reinforcement was investigated.
Book ChapterDOI
3.8 Laser-Based 3D Printing and Surface Texturing
A. Selimis,M. Farsari +1 more
TL;DR: In this paper, the advantages of laser treatment over the conventional structuring techniques are presented and the reader can follow its ongoing spread in a great variety of contemporary applications, including photonic and biomedicine.
Posted Content
Micro- and Nanoscale Heat Transfer in Femtosecond Laser Processing of Metals
Yuwen Zhang,D.Y. Tzou,J.K. Chen +2 more
TL;DR: In this article, a semi-classical two-step heating model was proposed to investigate thermal transport in metals caused by ultrashort laser heating, and the effect of hot-electron blast on the metal lattices along with the non-equilibrium heat flow.
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Critical appraisal and systematic review of 3D & 4D printing in sustainable and environment-friendly smart manufacturing technologies
Keshav Lalit Ameta,V.S. Solanki,Shafiul Haque,Vineeta Singh,Ahanthem Priyanca Devi,R. S. Chundawat +5 more
TL;DR: A review of the advancements in 3D and 4D printing technologies in last ten years is presented in this article , where the authors show how these techniques have brought revolution and sustainability in industrial development compared to the traditional manufacturing technologies.
References
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PatentDOI
Direct selective laser sintering of metals
Suman Das,Joseph J. Beaman +1 more
TL;DR: In this paper, a method of fabricating a fully dense, three dimensional object by direct laser sintering is disclosed, in which a degased powder layer is dispensed over a target surface and a beam of directed energy melts metallic powder in order to form a solid layer cross section.
Journal ArticleDOI
Absorptance of powder materials suitable for laser sintering
TL;DR: In this paper, the normal spectral absorptance of a number of metal, ceramic and polymer powders susceptible to be utilised for selective laser sintering (SLS) technique was experimentally determined.
Comparison between CO2 and ND:YAG lasers for use with selective laser sintering of steel-copper powders
TL;DR: In this paper, the performance of different sources of laser disponibles for frittage selectif direct au laser des poudres metalliques without aucun liant polymere is analyzed.
Comparison between CO2 and Nd:YAG lasers for use with selective laser sintering of steel-copper powders
TL;DR: In this paper, the performance of different sources of laser disponibles for frittage selectif direct au laser des poudres metalliques without aucun liant polymere is analyzed.