Deformation Behavior and Microstructure Evolution of the Cu-2Ni-0.5Si-0.15Ag Alloy During Hot Compression

Zhang, Yi; Xu, Qianqian; Chai, Zhe; Tian, Baohong; Liu, Ping; Tran, Hai T.

doi:10.1007/s11661-015-3150-7

Cited by 22 publications

(9 citation statements)

References 26 publications

(28 reference statements)

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“…However, their strength and conductivity are decreased by the substantial solid solubility of Fe atoms in the Cu matrix at high temperatures, and the slow precipitation speed at low temperatures [7,8]. Their properties may be improved by multi-component alloying [8][9][10][11][12][13]. Wang et al [14], Song et al [15], and Xie et al [16] investigated the influence of Ag.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Strengthening Model of Cu–Fe In-Situ Composites

Liu

Sheng

et al. 2020

Materials

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The tensile strength evolution and strengthening mechanism of Cu–Fe in-situ composites were investigated using both experiments and theoretical analysis. Experimentally, the tensile strength evolution of the in-situ composites with a cold deformation strain was studied using the model alloys Cu–11Fe, Cu–14Fe, and Cu–17Fe, and the effect of the strain on the matrix of the in-situ composites was studied using the model alloys Cu–3Fe and Cu–4.3Fe. The tensile strength was related to the microstructure and to the theoretical strengthening mechanisms. Based on these experimental data and theoretical insights, a mathematical model was established for the dependence of the tensile strength on the cold deformation strain. For low cold deformation strains, the strengthening mechanism was mainly work hardening, solid solution, and precipitation strengthening. Tensile strength can be estimated using an improved rule of mixtures. For high cold deformation strains, the strengthening mechanism was mainly filament strengthening. Tensile strength can be estimated using an improved Hall–Petch relation.

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Section: Introductionmentioning

confidence: 99%

Microstructure and Strengthening Model of Cu–Fe In-Situ Composites

Liu

Sheng

et al. 2020

Materials

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“…physics-based taking microstructure evolution into account (Nemat-Nasser et al (1998); Voyiadjis and Almasri (2008); Abed et al (2014); Zhang et al (2015)) and phenomenological that are based on empirical observations (Ramberg and Osgood (1943); Anand (1985); Rusinek et al (2007);…”

Section: Introductionmentioning

confidence: 99%

Experimental characterisation and computational modelling of cyclic viscoplastic behaviour of turbine steel

Rae

Benaarbia

Hughes³

et al. 2019

International Journal of Fatigue

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Fully reversed strain controlled low cycle fatigue and creep-fatigue interaction tests have been performed at ±0.7% strain amplitude and at three different temperatures (400°C, 500°C and 600°C) to investigate the cyclic behaviour of a FV566 martensitic turbine steel. From a material point of view, the hysteresis mechanical responses have demonstrated cyclic hardening at the running-in stage and subsequent, hysteresis cyclic softening during the rest of the material life. The relaxation and energy behaviours have shown a rapid decrease at the very beginning of loading followed by quasi-stabilisation throughout the test. A unified, temperature-and rate-dependent visco-plastic model was then developed and implemented into the Abaqus finite element (FE) code through a user defined subroutine (UMAT). The material parameters in the model were determined via an optimisation procedure based on a genetic solver. The multi-axial form of the constitutive model developed was demonstrated by analysing the thermomechanical responses of an industrial gas turbine rotor subjected to in-service conditions. A sub-modelling technique was used to optimise the FEA. A 2D global model of the rotor with a 3D sub-model of the second stage of the low pressure turbine were then analysed in turn. The complex transient stress and accumulated plastic strain fields were investigated under realistic thermo-mechanical fatigue loading (start-up and shutdown power plant loads). The sub-model was then used for local analysis leading to identification of potential crack initiation sites for the presented types of blade roots.

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“…Zhang, Z. et al [29] calculated the activation energy of 316 kJ mol −1 for the C194 copper alloy with iron and zinc additions. Zhang, Y. et al [30] calculated the activation energy of 316 kJ mol −1 for the Cu-2Ni-0.5Si--0.15Ag alloy and the activation energy of 336 kJ mol −1 for the Cu-Cr-Zr alloy [31]. Gao et al [13] studied the hot deformation behavior of a copper with different purities.…”

Section: The Hot Deformation Activation Energymentioning

confidence: 99%

High-temperature deformation properties of CuCr0.6 alloy

Rusz¹,

Schindler²,

Navrátil³

et al. 2020

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The submitted paper aimed to investigate the hot deformation behavior of CuCr0.6 alloy. Nil strength temperature of 1349 K and nil ductility temperature of 1313 K have been experimentally determined. Formability is monotonously increased with the decrease of forming temperature in the temperature range from 923 K to approx. 1273 K. The flow stress curves were obtained in the forming temperature interval of 923-1223 K and at a strain rate of 0.1-10 s −1. After their analysis, the hot deformation activation energy of 340 kJ mol −1 was calculated for peak stress and 393 kJ mol −1 for steady state. This proves that the value of the activation energy depends upon a strain size.

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Deformation Behavior and Microstructure Evolution of the Cu-2Ni-0.5Si-0.15Ag Alloy During Hot Compression

Cited by 22 publications

References 26 publications

Microstructure and Strengthening Model of Cu–Fe In-Situ Composites

Microstructure and Strengthening Model of Cu–Fe In-Situ Composites

Experimental characterisation and computational modelling of cyclic viscoplastic behaviour of turbine steel

High-temperature deformation properties of CuCr0.6 alloy

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