Thermal conductivity of Cu7.2Ni1.8Si1Cr copper alloy produced via SLM and ability of thin-wall structure fabrication

Mašek, Jakub; Koutný, Daniel; Popela, Robert

doi:10.13164/conf.read.2018.12

Cited by 3 publications

(2 citation statements)

References 6 publications

(16 reference statements)

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“…Copper alloy has high thermal conductivity and low laser absorption, so it is difficult to prepare by SLM [12,13]. In recent years, with the development of optical-fiber laser technology, preparation of Cu-Sn [14], Cu-Al-Ni-Mn [15] and Cu-Ni-Si [16] alloys by SLM has progressed somewhat by increasing laser output energy and adding other elements to reduce thermal conductivity and improve absorptivity.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of High-Strength Cu–Cr–Zr Alloy Fabricated by Selective Laser Melting

et al. 2020

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The approximate process range for preparing the Cu–Cr–Zr alloy by selective laser melting (SLM) was determined by ANSYS simulation, and the influence of the SLM process parameters on the comprehensive properties of the SLM-formed alloy was studied by the design of experiments. The Cu–Cr–Zr alloy with optimum strength and hardness was prepared with high efficiency by optimizing the process parameters for SLM (i.e., laser power, scanning speed, and hatching distance). It is experimentally shown that tensile strength and hardness of the SLM alloy are increased by increasing laser power and decreasing scanning speed, whereas they are initially increased and then decreased by increasing the hatching distance. Moreover, strength, roughness and hardness of the SLM alloy are optimized when laser power is 460 W, scanning speed is 700 mm/s and hatching distance is 0.06 mm. The optimized properties of the SLM alloy are a tensile strength of 153.5 MPa, hardness of 119 HV, roughness of 31.384 μm and relative density of 91.62%.

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Section: Introductionmentioning

confidence: 99%

Mechanical Properties of High-Strength Cu–Cr–Zr Alloy Fabricated by Selective Laser Melting

et al. 2020

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“…The correlated age-hardening mechanisms (with formations of Ni 2 Si precipitations) are described in the literature by Zhao et al [12]. Process parameters for the processing of a Cu7.2Ni1.8Si1Cr alloy were studied from Mašek et al [13] and were identified to be 400 W laser power and 1100 mm s −1 scanning speed, in order to build thin walls of 0.325 mm thickness.…”

Section: Introductionmentioning

confidence: 99%

Additive manufacturing of copper alloys: Influence of process parameters and alloying elements

Tiberto

Klotz

Held

et al. 2019

Materials Science and Technology

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Owing to the physical properties of copper and its alloys it is challenging to achieve good surface quality and low porosity by the widely used laser-based additive manufacturing processes. This paper deals with the role of alloy composition, powder size and process parameters in additive manufacturing with laser beam melting machine (with power up to 100 W). Test parts were produced in pure copper and CuNiSi(Cr) alloys. The porosity was investigated as a function of different process parameters and powder size ranges. The effects of the alloy physical properties (reflectivity, thermal conductivity, melting range and surface tension) are discussed. Moreover, the effect of thermal treatment on the properties of CuNiSi parts was assessed in conventional two-step heat treatments.

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Additive Manufacturing of Copper and Copper Alloys

Horn¹,

Gamzina²

2020

Additive Manufacturing Processes

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This article is a detailed account of additive manufacturing (AM) processes for copper and copper alloys such as copper-chromium alloys, GRCop, oxide-dispersion-strengthened copper, copper-nickel alloys, copper-tin alloys, copper-zinc alloys, and copper-base shape memory alloys. The AM processes include binder jetting, ultrasonic additive manufacturing, directed-energy deposition, laser powder-bed fusion, and electron beam powder-bed fusion. The article presents a review of the literature and state of the art for copper alloy AM and features data on AM processes and industrial practices, copper alloys used, selected applications, material properties, and where applicable, compares these data and properties to traditionally processed materials. The data presented and the surrounding discussion focus on bulk metallurgical processing of copper components. The discussion covers the composition and performance criteria for copper alloys that have been reported for AM and discusses key differences in process-structure-property relationships compared to conventionally processed material. The article also provides information on feedstock considerations for copper powder handling.

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Thermal conductivity of Cu7.2Ni1.8Si1Cr copper alloy produced via SLM and ability of thin-wall structure fabrication

Cited by 3 publications

References 6 publications

Mechanical Properties of High-Strength Cu–Cr–Zr Alloy Fabricated by Selective Laser Melting

Mechanical Properties of High-Strength Cu–Cr–Zr Alloy Fabricated by Selective Laser Melting

Additive manufacturing of copper alloys: Influence of process parameters and alloying elements

Additive Manufacturing of Copper and Copper Alloys

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