A novel route for strengthening copper rods: Non-solution heat treatment combined with pre-aging

Chen, Huiming; Yuan, Dawei; Xie, Wei; Zhang, Jianbo; Wang, Hang; Yang, Bin

doi:10.1016/j.jmatprotec.2019.116290

Cited by 11 publications

(7 citation statements)

References 20 publications

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“…CALPHAD (Calculations of PHAse Diagram) approach definitely helps explain phase evolution and so on so forth [26]. In our previous work, a type of Cu-Cr-In alloy has been designed, which has good hot working formability and excellent comprehensive performance with high strength and high conductivity [27,28], but little research has been carried out for its solidification behavior. Therefore, in the present work, the influence of element In on the solidification behavior of Cu-Cr alloys are investigated using experimental and thermodynamic methods.…”

Section: Introductionmentioning

confidence: 99%

Solidification microstructure of Cu–Cr and Cu–Cr-In alloys

Zhu¹,

Liao²,

Chen³

et al. 2020

Mater. Res. Express

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Solidification microstructure of Cu-Cr and Cu-Cr-In alloys has been characterized using scanning electron microscopy in the present work. Thermodynamic database has been established for the Cu-Cr binary system and Cu-Cr-In ternary system. Solidification behaviors of the two alloys have been simulated using the thermodynamic parameters based on Scheil model. The results show that the primary Cr phases with long and thin dendrites can be observed between Cu matrix grains for the Cu-Cr alloy, and the 'flower-like' coarsen dendrites primary Cr phases of the Cu-Cr-In alloy exist in the triangular grain boundary areas. The weight percent of indium element in the liquid phase of the Cu-Cr-In alloy during solidification continuously increases up. This will enlarge the solidification temperature range from 6°C to 214°C resulting in longer time for the dendrite growth and the alloying element indium with low melting point tends to segregate to the grain boundary region.

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Section: Introductionmentioning

confidence: 99%

Solidification microstructure of Cu–Cr and Cu–Cr-In alloys

Zhu¹,

Liao²,

Chen³

et al. 2020

Mater. Res. Express

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“…In our previous work [11,12], a Cu-Cr-In alloy type was designed, and elemental In addition to the Cu-Cr alloy was found to yield a strong solid-solution strengthening effect. The alloy exhibits a high strength and good conductivity with facile preparation and production.…”

Section: Introductionmentioning

confidence: 99%

“…The alloy exhibits a high strength and good conductivity with facile preparation and production. Chen et al [12] found that the dislocation density and strength increment vary with the different aging and cold-drawing processes. The recovery and recrystallization behavior of the alloy affects the alloy strength at a high service temperature, as well as the selection of processing technique and heat-treatment process.…”

Section: Introductionmentioning

confidence: 99%

Study on the Softening Behavior of Cu–Cr–In Alloy during Annealing

et al. 2020

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The softening behavior of a cold-drawn Cu–Cr–In alloy was investigated during annealing between 450 °C and 700 °C. The properties and microstructure evolution of the alloy were characterized using a microhardness tester, electron back-scatter diffraction, and transmission electron microscopy. Elemental In addition was found to hinder the dislocation movement and delay the recovery and recrystallization of the Cu–Cr–In alloy. The experimental data were analyzed using the Johnson–Mehlv–Avramiv–Kolmogorov model. The activation energy of recrystallization of the 60% cold-drawn Cu0.54Cr0.17In alloy was 188.29 ± 18.44 kJ/mol, and the recrystallization mechanism of the alloy was attributed mainly to Cu self-diffusion.

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“…Other elements are usually added to the Cu-Cr alloy to further improve its properties, such as Ag [6][7][8], Zr [9,10], Mg [11], In [12,13], and Sn [14]. Chen et al found that the addition of In to the Cu-Cr alloy resulted in a strong solid solution strengthening effect [13]. In addition, the Cu-Cr-In alloy displays good hot workability and has a high strength and high conductivity [13].…”

Section: Introductionmentioning

confidence: 99%

“…Chen et al found that the addition of In to the Cu-Cr alloy resulted in a strong solid solution strengthening effect [13]. In addition, the Cu-Cr-In alloy displays good hot workability and has a high strength and high conductivity [13]. Chen et al [15] also found that In has a positive effect on improving the softening resistance of Cu-Cr-In alloys.…”

Section: Introductionmentioning

confidence: 99%

Effect of trace La on microstructure and properties of Cu–Cr–In alloys

Xie

Zhang

Huang

et al. 2020

Mater. Res. Express

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The strength and conductivity of Cu-Cr-In alloys with trace La and different processing states were compared. Then, the influence of La on the structure and properties of the Cu-Cr-In alloy and the associated mechanisms were analyzed. The mechanical properties and microstructural evolution of the alloy were investigated via scanning electron microscopy, transmission electron microscopy, and tensile strength measurements. The results showed that the addition of 0.07wt% La to the Cu-Cr-In alloy had the effect of purifying the alloy melt and removing impurities, which improved the electrical conductivity of the alloy. However, the formation of rare earth intermetallic compounds reduced the tensile strength of the Cu-Cr-In-La alloy. After thermomechanical treatment, the Cu-Cr-In-La alloy reached a peak strength of 457 MPa and a conductivity of 85% IACS.

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A novel route for strengthening copper rods: Non-solution heat treatment combined with pre-aging

Cited by 11 publications

References 20 publications

Solidification microstructure of Cu–Cr and Cu–Cr-In alloys

Solidification microstructure of Cu–Cr and Cu–Cr-In alloys

Study on the Softening Behavior of Cu–Cr–In Alloy during Annealing

Effect of trace La on microstructure and properties of Cu–Cr–In alloys

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