High-precision laser powder bed fusion processing of pure copper

2021 ◽  
pp. 102417
Author(s):  
Shuo Qu ◽  
Junhao Ding ◽  
Jin Fu ◽  
Mingwang Fu ◽  
Baicheng Zhang ◽  
...  
Keyword(s):  
High Precision ◽  
Pure Copper ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Powder Bed

scholarly journals Electrical resistivity of pure copper processed by medium-powered laser powder bed fusion additive manufacturing for use in electromagnetic applications

2019 ◽  
Vol 29 ◽  
pp. 100831 ◽  
Author(s):  
Cassidy Silbernagel ◽  
Leonidas Gargalis ◽  
Ian Ashcroft ◽  
Richard Hague ◽  
Michael Galea ◽  
...  
Keyword(s):  
Electrical Resistivity ◽  
Additive Manufacturing ◽  
Pure Copper ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Powder Bed

scholarly journals In Vitro Characterization of In Situ Alloyed Ti6Al4V(ELI)-3 at.% Cu Obtained by Laser Powder Bed Fusion

Materials ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 7260
Author(s):  
Anna Martín Vilardell ◽  
Pavel Krakhmalev ◽  
Ina Yadroitsava ◽  
Igor Yadroitsev ◽  
Natalia Garcia-Giralt
Keyword(s):  
Surface Roughness ◽  
Cell Proliferation ◽  
Surface Composition ◽  
Pure Copper ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Powder Bed ◽  
Cu Content

The intensive cytotoxicity of pure copper is effectively kills bacteria, but it can compromise cellular behavior, so a rational balance must be found for Cu-loaded implants. In the present study, the individual and combined effect of surface composition and roughness on osteoblast cell behavior of in situ alloyed Ti6Al4V(ELI)-3 at.% Cu obtained by laser powder bed fusion was studied. Surface composition was studied using scanning electron microscopy, energy dispersive spectroscopy, and X-ray diffraction. Surface roughness measurements were carried out using confocal microscopy. In vitro osteoblast performance was evaluated by means of cell morphology observation of cell viability, proliferation, and mineralization. In vitro studies were performed at 1, 7, and 14 days of cell culture, except for cell mineralization at 28 days, on grounded and as-built (rough) samples with and without 3 at.% Cu. The addition of 3 at.% Cu did not show cell cytotoxicity but inhibited cell proliferation. Cell mineralization tends to be higher for samples with 3 at.% Cu content. Surface roughness inhibited cell proliferation too, but showed enhanced cell mineralization capacity and therefore, higher osteoblast performance, especially when as-built samples contained 3 at.% Cu. Cell proliferation was only observed on ground samples without Cu but showed the lowest cell mineralization.

Process development for laser powder bed fusion of pure copper

2020 ◽  
Author(s):  
Thomas Stoll ◽  
Pascal Trautnitz ◽  
Samuel Schmiedeke ◽  
Joerg Ernst Franke ◽  
Nahum Travitzky
Keyword(s):  
Process Development ◽  
Pure Copper ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Powder Bed

Forming feasibility and interface microstructure of Al/Cu bimetallic structure fabricated by laser powder bed fusion

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Jieren Guan ◽  
Qiuping Wang ◽  
Chao Chen ◽  
Jingyu Xiao
Keyword(s):  
Laser Energy ◽  
Pure Copper ◽  
Diffusion Activation Energy ◽  
Interface Microstructure ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Heat Accumulation ◽  
Content Type ◽  
Temperature Changes ◽  
Powder Bed

Purpose The purpose of this paper is to analyze and investigate heat accumulation caused by temperature changes and interface microstructure effected by element diffusion. Design/methodology/approach Al/Cu bimetallic structure is initially manufactured through laser powder bed fusion process. To minimize trial and error, finite element modeling is adopted to simulate temperature changes on the Al-based and Cu-based substrate. Findings The results show that forming pure copper on Al-based substrate can guarantee heat accumulation, providing enough energy for subsequent building. The instantaneous laser energy promotes increase of diffusion activation energy, resulting in the formation of transition zone derived from interdiffusion between Al and Cu atoms. The interface with a thickness of about 22 µm dominated by Kirkendall effect moves towards Al-rich side. The interface microstructure is mainly composed of a-Al, a-Cu and CuAl2 phase. Originality/value The bonding mechanism of Al/Cu interface is atom diffusion-induced chemical reaction. The theoretical basis provides guidance for structural design and production application.

Absorptivity measurements during laser powder bed fusion of pure copper with a 1 kW cw green laser

2022 ◽  
Vol 147 ◽  
pp. 107612
Author(s):  
G. Nordet ◽  
C. Gorny ◽  
Y. Mayi ◽  
J. Daligault ◽  
M. Dal ◽  
...  
Keyword(s):  
Pure Copper ◽  
Green Laser ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Powder Bed

Effect of high-temperature preheating on pure copper thick-walled samples processed by laser powder bed fusion

2022 ◽  
Vol 73 ◽  
pp. 924-938
Author(s):  
Martin Malý ◽  
Daniel Koutný ◽  
Libor Pantělejev ◽  
Laurent Pambaguian ◽  
David Paloušek
Keyword(s):  
High Temperature ◽  
Pure Copper ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Powder Bed

Near-Threshold Fatigue Crack Growth Rates of Laser Powder Bed Fusion Produced Ti-6Al-4V

2020 ◽  
Author(s):  
Thorsten Hermann Becker ◽  
Nur Mohamed Dhansay ◽  
Gerrit Matthys Ter Haar ◽  
Kim Vanmeensel
Keyword(s):  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Growth Rates ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Powder Bed ◽  
Crack Growth Rates ◽  
Near Threshold

scholarly journals On the Relevance of Volumetric Energy Density in the Investigation of Inconel 718 Laser Powder Bed Fusion

Materials ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 538 ◽  
Author(s):  
Fabrizia Caiazzo ◽  
Vittorio Alfieri ◽  
Giuseppe Casalino
Keyword(s):  
Surface Roughness ◽  
Energy Density ◽  
Process Parameters ◽  
Vickers Hardness ◽  
Powder Bed Fusion ◽  
Processing Conditions ◽  
Laser Powder Bed Fusion ◽  
Powder Bed ◽  
Fractional Density ◽  
Experimental Variation

Laser powder bed fusion (LPBF) can fabricate products with tailored mechanical and surface properties. In fact, surface texture, roughness, pore size, the resulting fractional density, and microhardness highly depend on the processing conditions, which are very difficult to deal with. Therefore, this paper aims at investigating the relevance of the volumetric energy density (VED) that is a concise index of some governing factors with a potential operational use. This paper proves the fact that the observed experimental variation in the surface roughness, number and size of pores, the fractional density, and Vickers hardness can be explained in terms of VED that can help the investigator in dealing with several process parameters at once.

Heat source model calibration for thermal analysis of laser powder-bed fusion

2020 ◽  
Vol 106 (7-8) ◽  
pp. 3367-3379 ◽  
Author(s):  
Shahriar Imani Shahabad ◽  
Zhidong Zhang ◽  
Ali Keshavarzkermani ◽  
Usman Ali ◽  
Yahya Mahmoodkhani ◽  
...  
Keyword(s):  
Thermal Analysis ◽  
Heat Source ◽  
Model Calibration ◽  
Source Model ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Heat Source Model ◽  
Powder Bed
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