Effect of Mg on the stress relaxation resistance of Cu–Cr alloys

Sun, Yan–Hui; Peng, Lijun; Huang, Guojie; Feng, Xue; Xie, Haofeng; Mi, Xujun; Liu, Xinhua

doi:10.1016/j.msea.2020.140144

Cited by 26 publications

(9 citation statements)

References 31 publications

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“…In Cu-Cr-Mg alloys [35] and Cu-Ni-Si alloys [36], this equation worked well. On this basis, we applied equation ( 4) to calculate the stress relaxation process for the samples.…”

Section: The Kinetic Analysis Of Thermal Stress Relaxation Resistance...mentioning

confidence: 81%

“…[27] proposed a kinetic equation for stress relaxation with reduced density of movable dislocations, the expression of which is shown in Equation (4): where σ* means the residual stress, t means the loading time, , , C and n are constants related to the structure of the material at the test temperature. In Cu-Cr-Mg alloys [35] and Cu-Ni-Si alloys [36], this equation worked well. On this basis, we applied equation (4) to calculate the stress relaxation process for the samples.…”

Section: Discussionmentioning

confidence: 99%

“…Electrical connectors are typically joined by the elastic material's contact pressure. Contact pressure failure due to stress relaxation may lead to an increase in resistance and eventual circuit failure [19,20]. The stress relaxation resistance of elastic alloys has an essential influence on the service life of the material.…”

Section: Introductionmentioning

confidence: 99%

“…Micro-alloying is an effective method for improving alloy stress relaxation resistance. According to the literature, Mg [20], Al [24], Fe [25], P [26], and Co [27] micro-alloying increased the stress relaxation resistance of copper alloys. Aruga's research [26] demonstrates that Cu-Ni-P alloys with low P content form low-density Ni-P clusters during annealing, which have a stronger pinning effect than solute atoms, resulting in a greater improvement in stress relaxation resistance compared to Cu-P alloys.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Co/P micro-alloying on stress relaxation behaviour of Cu-15Ni-8Sn alloy

Gong

Guo

Huang

et al. 2023

Materials Science and Technology

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To improve the stress relaxation resistance of the Cu-5Ni-S8n alloy, the effects of Co or P addition on its stress relaxation resistance were investigated by scanning electron microscopy, transmission electron microscopy, electron backscatter diffraction), X-ray diffraction, and high-temperature creep durability tester. The results revealed that the relaxation rate increased dramatically as the temperature rose. The thermal stress relaxation resistance of Cu-15Ni-8Sn alloy was significantly improved with Co addition; After 100 h of stress relaxation tests at 200°C or 250°C, the residual stress value of the Cu-15Ni-8Sn alloy increased by 23 MPa or 22 MPa with Co addition, which was associated with the consumption of vacancies by Co atoms and the pinning effect of Co atoms on dislocation. However, at 250°C, the stress relaxation resistance of the Cu-15Ni-8Sn-0.2P alloy was lower than that of the Cu-15Ni-8Sn alloy. This difference was due to the inclusion of P, which promoted the recrystallization reaction. Article highlights Recrystallization and the decrease of dislocation density are the major reasons for the stress relaxation of the samples. The stress relaxation resistance of Cu-15Ni-8Sn alloy was significantly improved with Co addition. The addition of the P element is not conducive to the improvement of thermal stress relaxation resistance.

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“…In Cu-Cr-Mg alloys [35] and Cu-Ni-Si alloys [36], this equation worked well. On this basis, we applied equation ( 4) to calculate the stress relaxation process for the samples.…”

Section: The Kinetic Analysis Of Thermal Stress Relaxation Resistance...mentioning

confidence: 81%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of Co/P micro-alloying on stress relaxation behaviour of Cu-15Ni-8Sn alloy

Gong

Guo

Huang

et al. 2023

Materials Science and Technology

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“…The dislocation density of intragranular can be calculated by the modified Williamson hall model [28,29]:…”

Section: Dislocation Strengtheningmentioning

confidence: 99%

Effect of regression and re-aging treatment on tensile yield strength anisotropy of 7050 aluminum alloy

Xie¹,

Yuan²

2022

Mater. Res. Express

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In this study, the evolution rule of yeild strength and microstructure along the axial, hoop and radial directions of 7050 aluminum alloy ring forging during Regression and re-aging (RRA) heat treatment was studied by using the experimental technology of tensile property test and transmission electron microscope (TEM) and Electron backscatter diffraction (EBSD) observation. During the RRA process, the evolution rule of intragranular and intergranular precipitates along axial, hoop and radial directions of 7050 aluminum alloy ring forging was described by establishing a model. After the pre-aging stage, the yield strength of samples along the axial, hoop and radial directions of forgings shows obvious anisotropy, and the anisotropy decreases gradually after regression and re-aging treatment. The results show that the cause of the larger yield strength anisotropy is the inhomogeneous size and distribution of precipitates after the pre-aging stage; After the regression stage, the cause of the reduction of the yield strength anisotropy is due to the homogeneous distribution of intragranular precipitates; After re-aging treatment, the reasons of further reduction of the yield strength anisotropy are because of more homogeneous distribution of intragranular precipitates and the discontinuous of intergranular precipitates.

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Customized development of promising Cu-Cr-Ni-Co-Si alloys enabled by integrated machine learning and characterization

Pan

Han

et al. 2023

Acta Materialia

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Effect of Mg on the stress relaxation resistance of Cu–Cr alloys

Cited by 26 publications

References 31 publications

Effect of Co/P micro-alloying on stress relaxation behaviour of Cu-15Ni-8Sn alloy

Effect of Co/P micro-alloying on stress relaxation behaviour of Cu-15Ni-8Sn alloy

Effect of regression and re-aging treatment on tensile yield strength anisotropy of 7050 aluminum alloy

Customized development of promising Cu-Cr-Ni-Co-Si alloys enabled by integrated machine learning and characterization

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