High-temperature deformation behavior of Cu–6.0Ni–1.0Si–0.5Al–0.15 Mg–0.1Cr alloy

Lei, Qian; Zhou, Li; Wang, Jing; Li, Si; Zhang, Liang; Dong, Qi

doi:10.1007/s10853-012-6511-2

Cited by 24 publications

(7 citation statements)

References 31 publications

(30 reference statements)

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“…Electron backscatter diffraction is used to analyze the texture, grain size, and orientation of the alloy. [ 37 ] Figure a,b shows the inverse pole figure (IPF) maps of the Cu–Ti–Ni–Mg alloy deformed at 750 and 850 °C with 0.001 s −1 strain rate. It can be seen from Figure 4a,b that the hot compression elongates the grains.…”

Section: Resultsmentioning

confidence: 99%

Ce Effects on Deformation‐Induced Microstructure Evolution in Cu–Ti–Ni–Mg Alloys

et al. 2023

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Cu–Ti–Ni–Mg and Cu–Ti–Ni–Mg–Ce alloys are prepared by vacuum induction melting. The hot deformation tests of the two alloys are carried out on the Gleeble‐1500 simulator under the deformation temperatures of 550–950 °C and strain rates of 0.001–10 s−1. The true stress–strain curves of the two alloys are obtained and the constitutive equations are established. The activation energy of the Cu–Ti–Ni–Mg alloy is 344.02 kJ mol−1, and the activation energy of the Cu–Ti–Ni–Mg–Ce alloy is 389.87 kJ mol−1. Based on the processing maps, the optimal processing parameters of the two alloys are obtained. The microstructure of the two alloys is analyzed by electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM). The addition of Ce reduces the dislocation density and texture strength. The CuNi2Ti precipitates are found in both alloys, and there are more precipitates in the Cu–Ti–Ni–Mg–Ce alloys. The addition of Ce increases the flow stress and activation energy, promotes precipitation, and improves the deformation resistance of the alloys.

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Section: Resultsmentioning

confidence: 99%

Ce Effects on Deformation‐Induced Microstructure Evolution in Cu–Ti–Ni–Mg Alloys

et al. 2023

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“…6b, c, e, and f, there are more and finer precipitates in the Cu-6.0Ni-1.0Si-0.5Al-0.15Mg alloy than in the Cu-6.0Ni-1.0Si-0.5Al alloy. The precipitates in the studied alloys have been determined to be δ-Ni 2 Si and β-Ni 3 Si in previous investigations [29][30]. The δ-Ni 2 Si precipitates had six variations in respective perpendicular directions.…”

Section: Precipitation Behaviorsmentioning

confidence: 99%

Effect of Magnesium on Microstructure Refinements and Properties Enhancements in High-Strength CuNiSi Alloys

Xiao

Sheng

Lei

et al. 2019

Acta Metall. Sin. (Engl. Lett.)

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Microalloying is an effective method to improve the comprehensive properties of copper alloys. The effects of magnesium on the microstructure, mechanical properties and anti-stress relaxation properties of CuNiSi alloys have been investigated. Results demonstrated that magnesium plays significant roles in refining the dendritic microstructure of the as-cast ingot, accelerating the precipitation decomposition, improving the mechanical properties and increasing the anti-stress relaxation properties. The incremental strength increase is due to the Orowan strengthening from the nanoscale Ni 2 Si and Ni 3 Al precipitates. As compared with the Cu-6.0Ni-1.0Si-0.5Al (wt%) alloy, the ultimate tensile strength of the designed Cu-6.0Ni-1.0Si-0.5Al-0.15Mg (wt%) alloy increases from 983.9 to 1095.7 MPa, and the electrical conductivity decreases from 27.1 to 26.6% IACS, respectively. The stress relaxation rates of the designed Cu-6.0Ni-1.0Si-0.5Al-0.15Mg alloy are 4.05% at 25 °C, 6.62% at 100 °C and 9.74% at 200 °C after having been loaded for 100 h, respectively. Magnesium significantly promotes nucleation during precipitation and maintains small precipitate size.

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“…At present, the large-scale Cu-Ni-Si alloy ingot is prepared by a semi-continuous casting process, and the strip is obtained by hot rolling and cold rolling, as well as heat treatment. Hence, the effect of hot deformation on the microstructure and mechanical properties of copper alloy was studied in previous work [8][9][10][11]. Lei [8] has studied the thermal compression deformation behavior of the Cu-6.0Ni-1.0Si-0.5Al-0.15Mg-0.1Cr alloy under a temperature range of 700-970 • C and a strain rate range of 0.001-1 s −1 , established the stress-strain constitutive equation and acquired the reasonable hot processing deformation parameters: 850-875 • C and 0.001-0.01 s −1 .…”

Section: Introductionmentioning

confidence: 99%

“…Hence, the effect of hot deformation on the microstructure and mechanical properties of copper alloy was studied in previous work [8][9][10][11]. Lei [8] has studied the thermal compression deformation behavior of the Cu-6.0Ni-1.0Si-0.5Al-0.15Mg-0.1Cr alloy under a temperature range of 700-970 • C and a strain rate range of 0.001-1 s −1 , established the stress-strain constitutive equation and acquired the reasonable hot processing deformation parameters: 850-875 • C and 0.001-0.01 s −1 . According to the trinary phase diagram of Cu-Ni-Si, Ni 2 Si intermetallic is precipitated at temperature 880 • C and the addition of Co to this system also results in the formation of the (Ni,Co) 2 Si phase at a temperature of 1050 • C [12].…”

Section: Introductionmentioning

confidence: 99%

Hot Deformation Behavior and Microstructure Evolution of Cu–Ni–Co–Si Alloys

Liu

Ma²,

Peng³

et al. 2020

Materials

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The Cu-1.7Ni-1.4Co-0.65Si (wt%) alloy is hot compressed by a Gleeble-1500D machine under a temperature range of 760 to 970 °C and a strain rate range of 0.01 to 10 s−1. The flow stress increases with the extension of strain rate and decreases with the rising of deformation temperature. The dynamic recrystallization behavior happens during the hot compression deformation process. The hot deformation activation energy of the alloy can be calculated as 468.5 kJ/mol, and the high temperature deformation constitutive equation is confirmed. The hot processing map of the alloy is established on the basis of hot deformation behavior and hot working characteristics. With the optimal thermal deformation conditions of 940 to 970 °C and 0.01 to 10 s−1, the fine equiaxed grain and no holes are found in the matrix, which can provide significant guidance for hot deformation processing technology of Cu–Ni–Co–Si alloy.

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High-temperature deformation behavior of Cu–6.0Ni–1.0Si–0.5Al–0.15 Mg–0.1Cr alloy

Cited by 24 publications

References 31 publications

Ce Effects on Deformation‐Induced Microstructure Evolution in Cu–Ti–Ni–Mg Alloys

Ce Effects on Deformation‐Induced Microstructure Evolution in Cu–Ti–Ni–Mg Alloys

Effect of Magnesium on Microstructure Refinements and Properties Enhancements in High-Strength CuNiSi Alloys

Hot Deformation Behavior and Microstructure Evolution of Cu–Ni–Co–Si Alloys

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