Pure copper rod formation by multibeam laser metal deposition method with blue diode lasers

Ono, Kazuhiro; Sato, Yuji; Higashino, Ritsuko; Funada, Yoshinori; Abe, Nobuyuki; Tsukamoto, Masahiro

doi:10.2351/7.0000322

Cited by 19 publications

(9 citation statements)

References 10 publications

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“…A carrier gas transports the powder through the outermost annular channel to the melting zone, while a shielding gas is used to avoid excessive oxygen pickup by the melt pool. The use of copper powders with size ranging from 30 to 110 μm have been reported in the literature [35][36][37][38]. The setup of the LMD process is schematically illustrated in Figure 5.…”

Section: Laser Metal Depositionmentioning

confidence: 99%

“…A great impetus to LMD of pure copper has been given by the recent introduction of green and blue laser sources, for which copper displays a relatively high absorptivity. Copper -From the Mineral to the Final Application Higher process control can thus be achieved and lower powers are required compared to conventional infrared lasers, ranging from 200 W to 1 kW for green laser sources depending on the physical properties of the substrate material [41] and lower than 87 W for blue diode lasers [35,36]. However, the real strength of LMD compared to powder-bed technologies is that it enables the relatively easy fabrication of multimaterial parts.…”

Section: Laser Metal Depositionmentioning

confidence: 99%

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Additive Manufacturing of Pure Copper: Technologies and Applications

Romano¹,

Vedani²

2023

Copper - From the Mineral to the Final Application

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The opportunity to process pure copper through additive manufacturing has been widely explored in recent years, both in academic research and for industrial uses. Compared to well-established fabrication routes, the inherent absence of severe design constraints in additive manufacturing enables the creation of sophisticated copper components for applications where excellent electrical and thermal conductivity is paramount. These include electric motor components, heat management systems, heat-treating inductors, and electromagnetic devices. This chapter discusses the main additive manufacturing technologies used to fabricate pure copper products and their achievable properties, drawing attention to the advantages and the challenges they have to face considering the peculiar physical properties of copper. An insight on the topic of recycling of copper powders used in additive manufacturing is also provided. Finally, an overview of the potential areas of application of additively manufactured pure copper components is presented, highlighting the current technological gaps that could be filled by the implementation of additive manufacturing solutions.

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Section: Laser Metal Depositionmentioning

confidence: 99%

Section: Laser Metal Depositionmentioning

confidence: 99%

Additive Manufacturing of Pure Copper: Technologies and Applications

Romano¹,

Vedani²

2023

Copper - From the Mineral to the Final Application

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“…And it was reported that the temperature dependence of the absorptivity of pure copper for blue laser is lower than that of the IR laser [5]. Because of these advantages, some researchers have reported the effectiveness of blue laser on pure copper processing [6,7,8]. On the other hands, the beam quality of blue diode laser is currently inferior to that of the IR laser.…”

Section: Introductionmentioning

confidence: 99%

Observation of melt pool dynamics in pure copper welding with blue-IR hybrid laser

Fujio

Sudo

Takenaka

et al. 2023

Laser Applications in Microelectronic and Optoelectronic Manufacturing (LAMOM) XXVIII

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A bead on plate welding test of pure copper plate was conducted with a hybrid laser which combined a high-power infrared (IR) laser and a blue laser to achieve a deep penetration and spatter-less welding of pure copper. A 1.5 kW class IR laser which has the wavelength around 1000 nm and a 1.5 kW class blue diode laser which has the wavelength of 450 nm were used as a heat source. The IR laser and the blue diode laser were irradiated perpendicular to the sample at the angles of 0° and 45°, respectively. Each laser was focused onto 2 mm thick pure copper sample and combined on the surface of it as a hybrid laser. The hybrid laser was scanned on the sample at 100 mm/s varying the output power of the IR laser and the blue diode laser. While scanning the lasers, the dynamics of melt pool formation and the spatters were observed with a high-speed video camera. After laser irradiation, the cross-section of the sample was observed and the penetration depth of the bead was measured. As the results, it was found that the penetration depth of pure copper increased and the number of spatters generated per scanning length decreased with the increase of blue laser intensity. Also, it was clarified that the melt pool dynamics affects the amount of spatter generated during welding.

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“…At present, the commonly used surface treatment methods include thermal spraying, [5,6] laser cladding, [7][8][9] and friction spot extrusion welding-brazing. [10] However, when the aforementioned hot-working process is used for the surface repair of Cu alloys, it is easy to cause problems such as oxidation and microstructure changes of the substrate and coating, [11,12] which will affect the overall performance of coating.…”

Section: Introductionmentioning

confidence: 99%

Improvement of Microstructure and Properties of Cu Coatings Prepared with Cold Spraying by Plasma Heating

Wang

Chang

et al. 2022

Adv Eng Mater

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To improve the microstructure and properties of Cu coating prepared by cold spraying, the plasma heating is used during the cold spraying process. The models of Cu particles deposited on a Cu substrate during cold spraying process without/with plasma heating are established and calculated, and the results are compared. The calculated results show that the plasma heating causes copper particles and substrates to produce greater plastic deformation during deposition. The microstructure of Cu coating prepared by cold spraying with plasma heating is experimentally investigated. Plasma heating can effectively reduce the porosity of the copper coating, improve the binding between the coating and the substrate, and reduce the grain size of the coating, which is due to the greater deformation of the copper particles under plasma heating. The experimental results are consistent with the calculation results. The results of the coating immersion experiments show that the corrosion rate of the Cu coating prepared by plasma‐assisted low‐pressure cold spraying is reduced from 1.5 to 0.094 mg cm−2 h compared with the samples prepared without plasma heating under the same conditions, which is due to the reduced porosity of the coating.

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Pure copper rod formation by multibeam laser metal deposition method with blue diode lasers

Cited by 19 publications

References 10 publications

Additive Manufacturing of Pure Copper: Technologies and Applications

Additive Manufacturing of Pure Copper: Technologies and Applications

Observation of melt pool dynamics in pure copper welding with blue-IR hybrid laser

Improvement of Microstructure and Properties of Cu Coatings Prepared with Cold Spraying by Plasma Heating

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