Microstructural effects on tension and fatigue behavior of Cu–15Ni–8Sn sheet

Caris, Joshua; Varadarajan, Ravikumar; Stephens, J. A.; Lewandowski, John J.

doi:10.1016/j.msea.2008.01.061

Cited by 21 publications

(8 citation statements)

References 18 publications

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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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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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“…El desarrollo de aleaciones ternarias de alta resistencia está siendo motivo de variados estudios desde mediados de la pasada década. En la mayor parte de ellas, su resistencia mecánica se fundamenta en la formación de precipitados binarios y/o ternarios de extrema fineza resistentes a ser cortados por las dislocaciones, lo que confiriere al material un elevado límite de fluencia (Sierpinski and Gryziecki 1999;Varschavsky y Donoso, 2002, Varschavsky y Donoso, 2003Batra et al, 2005;Donoso et al, 2007;Caris et al, 2008;Donoso, 2010;Bahmanpour et al, 2011;El-Danaf et al, 2011;San et al, 2011;Donoso et al, 2012a;Pandey et al, 2012;Donoso et al, 2016;Diánez et al, 2016;Donoso et al, 2017).…”

Section: Introductionunclassified

Influencia de la deformación previa sobre el endurecimiento por precipitación en una aleación de Cu-Ni-Si

2019

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Los efectos de la deformación previa sobre los procesos de precipitación en una aleación de Cu-2,8 Ni-1,4 Si (at.%) fueron estudiados utilizando calorimetría diferencial de barrido (DSC), microscopía electrónica de transmisión (TEM) y medidas de microdureza. Las curvas calorimétricas muestran la presencia de una reacción exotérmica atribuido a la formación de precipitados de δ-Ni2Si en la matriz de cobre, lo cual fue confirmado mediante TEM. Además, sse puede observar que la temperatura del máximo del pico de DSC decrece con el aumento de la deformación previa a los tratamientos de envejecimiento. Las energías de activación calculadas para la precipitación de δ-Ni2Si, mediante el método de Kissinger, resultaron similares a aquellas calculadas mediante una función de Arrhenius, a partir del máximo de endurecimiento de la matriz debido al tratamiento de envejecimiento (saturación de la dureza durante el envejecimiento isotérmico). El análisis de las medidas de microdureza en conjunto con las curvas calorimétricas y las micrografías TEM permiten corroborar, por una parte que la formación de la fase δ-Ni2Si, durante los tratamientos de envejecimiento, son los responsables del endurecimiento de la matriz de cobre, y por otra que la deformación previa al tratamiento de envejecimiento inhibe parcialmente la formación de los precipitados.

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“…Concerning the mechanical properties, to the best of the authors' knowledge, few papers have dealt with the strength and fatigue behavior of Cu-15Ni-8Sn, and none deals with the mechanical behavior of Cu-15Ni-8Sn cast alloy. Indeed, only the alloy obtained by powder metallurgy was investigated in [11,12], where the influence of the aging treatment was assessed in terms of the yield stress, ultimate stress and fatigue endurance of thin sheets. In particular, concerning the fatigue analysis, strain controlled tests were performed and the results focused on the alloy behavior in the range of low cycle fatigue, highlighting some differences between genuine and heat treated specimens in terms of fatigue life only at very low cycles.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Fatigue Behavior of a Ni-Cu-Sn Alloy

Bertini

Bucchi

Frendo

et al. 2018

Metals

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In this paper, the static and fatigue properties of a Cu-Ni-Sn alloy are investigated. Tensile tests, hardness tests and microstructural analyses using optical and scanning electron microscopy (SEM) were performed and two sets of fatigue tests, with load ratio (R) R = − 1 and R = 0 , respectively, were carried out. The results showed the capability of the alloy to bear high static stress, thanks to its good strength properties. However, the fatigue tests showed a strong sensitivity of the alloy fatigue properties depending on the raw material batch. The comparison between microstructural analyses and fatigue test results showed a strong correlation; in particular, the specimens having a more inhomogeneous microstructure showed lower durability. In addition, the different microstructure also affected the fracture surface morphology as highlighted by SEM analyses.

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Microstructural effects on tension and fatigue behavior of Cu–15Ni–8Sn sheet

Cited by 21 publications

References 18 publications

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

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

Influencia de la deformación previa sobre el endurecimiento por precipitación en una aleación de Cu-Ni-Si

Microstructure and Fatigue Behavior of a Ni-Cu-Sn Alloy

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