Microstructures and properties of SLM-manufactured Cu-15Ni-8Sn alloy

Wang, Jibing; Zhou, Xianwei; Li, Jinghao; Brochu, Mathieu; Zhao, Yaoyao Fiona

doi:10.1016/j.addma.2019.100921

Cited by 26 publications

(17 citation statements)

References 33 publications

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“…Direct aging of the DED processed 300-Ni maraging steel resulted in uniform precipitation of Ni 3 Ti, Ni 3 Mo, and Fe 7 Mo 6 phases [118]. In Cu alloys, significant supersaturation of the α-Cu matrix allowed the as-built samples to respond well to direct aging without an intermediate solution annealing step [119][120][121].…”

Section: Compositional Heterogeneitymentioning

confidence: 99%

“…The supersaturated matrix with higher solute solubility is another unique microstructural aspect in MAM parts. It helps remove a solution annealing heat treatment step because the parts responded well to direct aging [119][120][121]. Also, the in-situ heat treatment of the previously deposited layer initiates fine precipitation from the supersaturated matrix during part fabrication and reduces the overall aging time and temperature [115].…”

Section: Summary and Future Directionmentioning

confidence: 99%

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Heterogeneous Aspects of Additive Manufactured Metallic Parts: A Review

2021

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Metal additive manufacturing (MAM) is an emerging technology to produce complex end-use metallic parts. To adopt MAM for manufacturing numerous engineering parts used in critical applications, a thorough understanding of the relationship between the complex thermal cycles in MAM and the unique heterogeneous microstructures of MAM parts need to be established. This review article provides a comprehensive overview of the evolution of heterogeneous microstructures in MAM parts, including melt pool boundaries, heterogeneous grain structure, sub-grain cellular structure, matrix supersaturation, segregation, phase transformation, oxides formation, and texture. The evolution of residual stresses and the anisotropy in MAM parts and the post-MAM heat treatment effects on the microstructural evolution are also discussed. This review covers the microstructural aspects of most engineering materials in particular steels, high entropy alloys, aluminum alloys, titanium alloys, nickel-base superalloys, and copper alloys, with a primary focus on the parts manufactured using selective laser melting, direct energy deposition, and electron beam melting processes.

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Section: Compositional Heterogeneitymentioning

confidence: 99%

Section: Summary and Future Directionmentioning

confidence: 99%

Heterogeneous Aspects of Additive Manufactured Metallic Parts: A Review

2021

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“…Copper and its alloys are of great difficulty to the LPBF process because of high reflectivity, heat conductivity, and poor laser absorption, but it was overcome, and even pure copper was synthesized [15][16][17]. LPBF of Cu-Sn alloys was studied intensively within whole range of tin content: Cu-4Sn [18], Cu-4.3Sn [19], Cu-10Sn [1,20,21], Cu-15Sn alloy [22], Cu-15Ni-8Sn [23]. Casting and mechanical alloying of Cu-Sn alloys provide strengthening also through fabricating in-situ nanostructured grains or nanocomposites [24,25].…”

Section: Introductionmentioning

confidence: 99%

Laser Powder Bed Fusion of Chromium Bronze Using Recycled Powder

et al. 2021

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Laser powder bed fusion (LPBF) of Cu-0.5Cr was carried out using recycled powder taken out from the LPBF machine after previous printing. Various volumetric defects characterized the powder wherein particle size distribution was the same as virgin powder. Using recycled powder resulted in extra spherical pore formation after the LPBF process. Despite that, a relative density of 99.2% was achieved by LPBF parameters optimization. Solidified microstructure with a small volume of defects consisted of an oversaturated dendritic Cu matrix and nano-sized Cr precipitations providing strengthening mechanism occurrence. The possibility of a satisfactory level of mechanical properties with σ0.2 = 136.8 MPa, UTS = 187.4 MPa, along with 15.5% of elongation achieving, was shown.

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“…The copper-nickel-tin alloy is one of the important copper alloys that is widely used in modern industries such as aerospace, rail transit, heavy-duty machinery, marine engineering, etc. [1][2][3][4][5][6][7] In recent years, many researchers have been attracted to the study of how to improve the mechanical properties and conductivity of copper-nickel-tin alloys such as Cu-15Ni-8Sn [8][9][10] and Cu-9Ni-6Sn, with high contents of Ni and Sn elements [11,12]. It is well known that the mechanical properties depend on the microstructures; thus, the microstructure evolution and influencing factors should be researched systematically.…”

Section: Introductionmentioning

confidence: 99%

Revealing the Effect of Phase Composition and Transformation on the Mechanical Properties of a Cu–6Ni–6Sn–0.6Si Alloy

et al. 2021

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In the present study, a Cu–6Ni–6Sn–0.6Si alloy is fabricated through frequency induction melting, then subjected to solution treatment, rolling, and annealing. The phase composition, microstructure evolution, and transition mechanism of the Cu–6Ni–6Sn–0.6Si alloy are researched systematically through simulation calculation and experimental characterization. The ultimate as-annealed sample simultaneously performs with high strength and good ductility according to the uniaxial tensile test results at room temperature. There are amounts of precipitates generated, which are identified as belonging to the DO22 and L12 phases through the transmission electron microscope (TEM) analysis. The DO22 and L12 phase precipitates have a significant strengthening effect. Meanwhile, the generation of the common discontinuous precipitation of the γ phase, which is harmful to the mechanical properties of the copper–nickel–tin alloy, is inhibited mightily during the annealing process, possibly due to the existence of the Ni5Si2 primary phase. Therefore, the as-annealed sample of the Cu–6Ni–6Sn–0.6Si alloy possesses high tensile strength and elongation, which are 967 MPa and 12%, respectively.

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Microstructures and properties of SLM-manufactured Cu-15Ni-8Sn alloy

Cited by 26 publications

References 33 publications

Heterogeneous Aspects of Additive Manufactured Metallic Parts: A Review

Heterogeneous Aspects of Additive Manufactured Metallic Parts: A Review

Laser Powder Bed Fusion of Chromium Bronze Using Recycled Powder

Revealing the Effect of Phase Composition and Transformation on the Mechanical Properties of a Cu–6Ni–6Sn–0.6Si Alloy

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