Microstructure, thermal physical property and surface morphology of W-Cu composite fabricated via selective laser melting

Yan, Anru; Wang, Zhiyong; Yang, Tiantian; Wang, Yanling; Ma, Zhe

doi:10.1016/j.matdes.2016.07.049

Cited by 62 publications

(17 citation statements)

References 46 publications

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“…Unfortunately, the researches of copper alloys in SLM are still limited in virtue of the copper's low absorptivity at laser and high thermal conductivity [16] as well as poor liquid fluidity caused by the paste solidification mechanism. Although increasing the energy density has offered a feasibility to produce high-density copper alloy parts in SLM [2,[16][17][18][19][20], there are still no interrelated researches systematically elaborating the optimisation process of the processing parameters and the relationships between mechanical properties and microstructural evolution of high-tin bronze in SLM.…”

Section: Introductionmentioning

confidence: 99%

Processing optimisation, mechanical properties and microstructural evolution during selective laser melting of Cu-15Sn high-tin bronze

Mao

Zhang

Jiang

et al. 2018

Materials Science and Engineering: A

109

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Section: Introductionmentioning

confidence: 99%

Processing optimisation, mechanical properties and microstructural evolution during selective laser melting of Cu-15Sn high-tin bronze

Mao

Zhang

Jiang

et al. 2018

Materials Science and Engineering: A

109

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“…Bulk samples sintered at a 900 mA laser current comprised an 85% relative density. With an increase in the laser current of up to 2500 mA (exposure time 125 µs, point distance 10 µm), a relative density of 93% was achieved, which is comparable with the W-Cu composite obtained by the SLM method (91.6%) [ 37 ]. The laser current was revealed to be the most determinative parameter to achieve high relative density compacts of Mo-Cu and W-Cu.…”

Section: The Role Of Coupling On the Synthesis And Sintering Of Shs Powdersmentioning

confidence: 85%

SHS-Derived Powders by Reactions’ Coupling as Primary Products for Subsequent Consolidation

2021

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The capability of self-propagating high-temperature synthesis (SHS) to produce powders that are characterized by a high sintering ability, owing to high heating and cooling rates inherent to the exothermic reaction, is of a special interest for the industry. In particular, SHS-derived powders comprise a significant defect concentration in order to effectively enhance the mass transfer processes during the sintering, which allows for the successful consolidation of difficult-to-sinter materials at relatively low sintering temperatures. From this perspective, the design of precursors suitable for sintering, synthesis in a controlled temperature regime and the optimization of geometrical and structural parameters of SHS powders as a potential feedstock for the consolidation is of key importance. Here, we report on the comparative studies concerning the SHS processing of composites for advanced powder metallurgy techniques. The synthesis and sintering peculiarities of the SHS through coupled reactions in the Me’O3(WO3,MoO3)-Me’’O(CuO,NiO)-Mg-C, Ti-B-Al12Mg17 systems are comparatively reviewed. The SHS coupling approach was used for the preparation of powders with a tuned degree of fineness (a high specific surface area of particles), a high-homogeneity and a controllable distribution of elements via both the regulation of the thermal regime of combustion in a wide range and the matching of the thermal and kinetic requirements of two interconnected reactions. Microstructural features of the powder feedstock greatly contributed to the subsequent consolidation process.

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“…Due to the significant cost differences between pure Ag and Cu; Cu and its alloys are becoming increasingly popular and research is being carried out that utilises the potential benefits of L-PBF technologies 32,36,43 . For example, tungsten-copper (W-Cu) alloys have been investigated utilising L-PBF in several studies 44,45 with the development of Cu-Cr alloys also being reported 46 .…”

Section: Introductionmentioning

confidence: 99%

Mechanical and thermal performance of additively manufactured copper, silver and copper–silver alloys

Robinson

Arjunan

Baroutaji

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part L:

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On-demand additive manufacturing (three-dimensional printing) offers great potential for the development of functional materials for the next generation of energy-efficient devices. In particular, novel materials suitable for efficient dissipation of localised heat fluxes and non-uniform thermal loads with superior mechanical performance are critical for the accelerated development of future automotive, aerospace and renewable energy technologies. In this regard, this study reports the laser powder bed fusion processing of high purity (>99%) copper (Cu), silver (Ag) and novel copper–silver (CuAg) alloys ready for on-demand additive manufacturing. The processed materials were experimentally analysed for their relative density, mechanical and thermal performance using X-ray computed tomography, destructive tensile testing and laser flash apparatus, respectively. It was found that while Ag featured higher failure strains, Cu in comparison showed a 109%, 17% and 59% improvement in yield strength ([Formula: see text]), Young’s modulus ( E) and ultimate tensile strength, respectively. As such the [Formula: see text], E and ultimate tensile strength for laser powder bed fusion Cu is comparable to commercially available laser powder bed fusion Cu materials. CuAg alloys, however, significantly outperformed Ag, Cu and all commercial Cu materials when it came to mechanical performance offering significantly superior performance. The [Formula: see text], E and ultimate tensile strength for the novel CuAg composition were 105%, 33% and 94% higher in comparison to Cu. Although slightly different, the trend continued with a 106% and 91% rise for [Formula: see text] and ultimate tensile strength, respectively, for CuAg in comparison to industry-standard Cu. Unfortunately, E values for industry-standard Cu alloys were not available. When it came to thermal performance, laser powder bed fusion Ag was found to offer a 70% higher thermal diffusivity in comparison to Cu despite the variation in density and porosity. CuAg alloys however only showed a 0.8% variation in thermal performance despite a 10–30% increase in Ag. Overall, the study presents a new understanding regarding the three-dimensional printing and performance of Cu, Ag and CuAg alloys.

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Microstructure, thermal physical property and surface morphology of W-Cu composite fabricated via selective laser melting

Cited by 62 publications

References 46 publications

Processing optimisation, mechanical properties and microstructural evolution during selective laser melting of Cu-15Sn high-tin bronze

Processing optimisation, mechanical properties and microstructural evolution during selective laser melting of Cu-15Sn high-tin bronze

SHS-Derived Powders by Reactions’ Coupling as Primary Products for Subsequent Consolidation

Mechanical and thermal performance of additively manufactured copper, silver and copper–silver alloys

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