Micro-addition of Fe in highly alloyed Cu-Ti alloys to improve both formability and strength

Rouxel, Baptiste; Cayron, Cyril; Bornand, Julien; Sanders, Paul G.; Logé, Roland E.

doi:10.1016/j.matdes.2021.110340

Cited by 36 publications

(2 citation statements)

References 59 publications

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“…Li et al investigated the microstructure and properties of Cu-2.7Ti-0.15Mg-0.1Ce-0.1Zr alloy and found that the addition of trace Mg element could improve the strength and conductivity of Cu-Ti alloy due to the dragging effect of Mg atoms [8]. Rouxel et al found that the addition of trace Fe element in Cu-Ti alloy inhibited the modulation decomposition at the early stage of aging, leading to improvements in ductility and strength [9].…”

Section: Introductionmentioning

confidence: 99%

Work Hardening Behavior and Microstructure Evolution of a Cu-Ti-Cr-Mg Alloy during Room Temperature and Cryogenic Rolling

Xiao

Zhou

et al. 2023

Materials

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A Cu-1.79Ti-0.39Cr-0.1Mg (wt.%) alloy was prepared by a vacuum induction melting furnace in a high-purity argon atmosphere. The effects of room temperature rolling and cryogenic rolling on the microstructure, textures, and mechanical properties of the alloy were investigated by means of electron backscatter diffraction, transmission electron microscopy, and X-ray diffraction. The results show that the hardness of the cryogenically rolled alloy is 18–30 HV higher than that of the room temperature rolled alloy at any tested rolling reduction. The yield strength and tensile strength of the alloy cryogenically rolled by 90% reduction are 723 MPa and 796 MPa, respectively. With the increase of rolling reduction, the orientation density of the Cube texture decreases, while the Brass texture increases. The Brass texture is preferred especially during the cryogenic rolling, suggesting that the cross-slip is inhibited at the cryogenic temperature. The dislocation densities of Cu-Ti-Cr-Mg alloy increase significantly during the deformation, finally reaching 23.03 × 10−14 m−2 and 29.98 × 10−14 m−2 after a 90% reduction for the room temperature rolled and cryogenically rolled alloys, respectively. This difference could be attributed to the impediment effect of cryogenic temperature on dynamic recovery and dynamic recrystallization. The cryogenic temperature promotes the formation of the dislocation and the nano-twins, leading to the improvement of the mechanical properties of the alloy.

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Section: Introductionmentioning

confidence: 99%

Work Hardening Behavior and Microstructure Evolution of a Cu-Ti-Cr-Mg Alloy during Room Temperature and Cryogenic Rolling

Xiao

Zhou

et al. 2023

Materials

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“…After graded aging treatment at 300 °C for 2 h + 450 °C for 7 h, the conductivity and hardness of the Cu–3Ti–3Ni alloy can reach 31.34% IACS and 187 HV, respectively. Rouxel et al [ 19 ] investigated the addition of 0.3 wt% Fe to the Cu–6Ti alloy, and the results showed that the addition of Fe reduced the yield strength of the Cu–6Ti alloy from 521 to 323 MPa, while the elongation increased to 48%. Maki et al [ 20 ] found that a supersaturated solid solution of Mg in the Cu matrix resulted in high strength while maintaining the high electrical conductivity of the Cu alloy.…”

Section: Introductionmentioning

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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Synergistical Effects of Mg Microalloying, Deformation, and Aging on the Strength and Electrical Conductivity of Cu‐3.3 wt%Ti Alloy

Yang,

Guo,

Wang

et al. 2024

Adv Eng Mater

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Herein, large electrical conductivity of 21% IACS and high strength of 1118 MPa in the Cu‐3.3 wt%Ti alloy are successfully achieved based on the coupling control of microalloying, deformation, and aging. It is revealed that compared with the Mg‐free Cu‐3.3 wt%Ti alloy prepared by traditional treatment methods, such as aging, deformation + aging, and the novel method of preaging + cold rolling + aging, both the addition of 0.1 wt%Mg and the novel method of preaging + cold rolling + aging not only can greatly improve the uniform distribution level of dislocation formed during cold rolling and reduce the average size of precipitates, but also can significantly improve the formation of multiscale precipitates with higher volume fraction and their coupling distribution with dislocations, which effectively improve the electrical conductivity and strengthening contribution of precipitates and dislocation simultaneously. The results shed light on the understanding of related mechanisms in Cu‐Ti alloys and hopefully also provide theoretical guidance for industrial production and applications of Cu‐Ti alloys with excellent properties.

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Micro-addition of Fe in highly alloyed Cu-Ti alloys to improve both formability and strength

Cited by 36 publications

References 59 publications

Work Hardening Behavior and Microstructure Evolution of a Cu-Ti-Cr-Mg Alloy during Room Temperature and Cryogenic Rolling

Work Hardening Behavior and Microstructure Evolution of a Cu-Ti-Cr-Mg Alloy during Room Temperature and Cryogenic Rolling

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

Synergistical Effects of Mg Microalloying, Deformation, and Aging on the Strength and Electrical Conductivity of Cu‐3.3 wt%Ti Alloy

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