Effects of Mg addition on the microstructure and softening resistance of Cu–Cr alloys

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

doi:10.1016/j.msea.2020.139009

Cited by 91 publications

(22 citation statements)

References 36 publications

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“…Therefore, it is necessary to explore the relationship between microstructural parameters and their properties. The strength of SPD-deformed materials can be further improved by alloying, as the solute atoms and precipitates have a pinning effect on dislocations and grain boundaries, as shown in previous studies [18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 66%

The Influence of Severe Plastic Deformation and Subsequent Annealing on the Microstructure and Hardness of a Cu–Cr–Zr Alloy

et al. 2020

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A Cu–1.1%Cr–0.04%Zr (wt.%) alloy was processed by severe plastic deformation (SPD) using the equal channel angular pressing (ECAP) technique at room temperature (RT). It was found that when the number of passes increased from one to four, the dislocation density significantly increased by 35% while the crystallite size decreased by 32%. Subsequent rolling at RT did not influence considerably the crystallite size and dislocation density. At the same time, cryorolling at liquid nitrogen temperature yielded a much higher dislocation density. All the samples contained Cr particles with an average size of 1 µm. Both the size and fraction of the Cr particles did not change during the increase in ECAP passes and the application of rolling after ECAP. The hardness of the severely deformed Cu alloy samples can be well correlated to the dislocation density using the Taylor equation. Heat treatment at 430 °C for 30 min in air caused a significant reduction in the dislocation density for all the deformed samples, while the hardness considerably increased. This apparent contradiction can be explained by the solute oxygen hardening, but the annihilation of mobile dislocations during annealing may also contribute to hardening.

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Section: Introductionmentioning

confidence: 66%

The Influence of Severe Plastic Deformation and Subsequent Annealing on the Microstructure and Hardness of a Cu–Cr–Zr Alloy

et al. 2020

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“…When the annealing temperature is blow 500 ℃, the hardness of Cu-Cr-Ti alloy keeps a constantly high level. Compared with Cu-Cr-Mg alloy [14], Ti element better improves the softening resistance during low temperature annealing. When the annealing temperature is above 500, the hardness begins to decline.…”

Section: Softening Resistancementioning

confidence: 99%

Microstructure and properties of Cu-Cr-Ti alloy with high softening resistance

Yang

Wang

Ma³

et al. 2022

J. Phys.: Conf. Ser.

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Cu-Cr alloys with excellent mechanical and electrical properties have been used in many industrial fields. However, the weak heat resistance of Cu-Cr alloys is a considerable shortness. In this work, Cu-Cr-Ti alloy was fabricated by vacuum melting and plastic deformation. Mechanical property and electrical conductivity of Cu-Cr-Ti alloy were investigated after aging treatment. The results show that peak aging occurs when aging at 450 °C for 1 hour. The mechanism of performance changes are discussed. The softening temperature could be identified as 575 °C, according to percentage of hardness changes of peak-aged Cu-Cr-Ti alloy annealed at different temperature and time. The microstructure explained that the addition of Ti, which retards recrystallization, could enhance the softening resistance of Cu-Cr alloy.

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“…Zhang et al [13] found that the Ti element improves the softening resistance of the alloy, but the electrical conductivity decreased significantly. Sun et al [14] found that Mg can inhibit the growth of the Cr phase, hinder the movement of dislocations, delay the recrystallization behavior of the alloy, improve the softening resistance of the alloy, and reduce the electrical conductivity slightly. Ag atom has little effect on the conductivity of copper because its electronic structure and crystal structure resemble Cu.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and softening resistance of Cu-Cr-Ag alloy

Wang

Huang

Zhang

et al. 2022

J. Phys.: Conf. Ser.

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In this paper, Cu-0.5Cr and Cu-0.5Cr-0.1Ag alloys were used as experimental materials to test the softening resistance of the alloys. The results show that the addition of Ag can improve the hardness and softening temperature of the Cu-Cr alloy, and has little effect on the conductivity. The softening resistance temperature of Cu-0.5Cr-0.1Ag alloy is 575 °C, which is 25 °C higher than that of Cu-0.5Cr alloy. The softening process of the alloy is accompanied by grain recovery, recrystallization and coarsening. Ag atom improves the recrystallization activation energy of copper alloy and delays the recrystallization and recrystallization grain growth in the softening process. Recrystallization is the main factor leading to the softening of the alloy.

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Effects of Mg addition on the microstructure and softening resistance of Cu–Cr alloys

Cited by 91 publications

References 36 publications

The Influence of Severe Plastic Deformation and Subsequent Annealing on the Microstructure and Hardness of a Cu–Cr–Zr Alloy

The Influence of Severe Plastic Deformation and Subsequent Annealing on the Microstructure and Hardness of a Cu–Cr–Zr Alloy

Microstructure and properties of Cu-Cr-Ti alloy with high softening resistance

Microstructure and softening resistance of Cu-Cr-Ag alloy

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