Contribution of Zr to strength and grain refinement in Cu Cr Zr alloy

Chen, Jinshui; Wang, Junfeng; Xiao, Xiangpeng; Wang, Hang; Chen, Huiming

doi:10.1016/j.msea.2019.04.053

Cited by 80 publications

(35 citation statements)

References 35 publications

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“…Zr-based alloys have high corrosion resistance in high-temperature aqueous solutions, good mechanical properties, and resistance to radiation damage, which are widely used in aerospace [4], military [5], nuclear reaction [6], atomic energy [7], chemical engineering [8], marine engineering, medicine [8], biology and so on [9]. At present, many research scientists are shifting their focus to the mechanical properties of Zrbased alloys to expand further the application potential of Zr in the structural field [10][11][12][13]. However, the mechanical properties of these alloys are poor, including their ultimate tensile strength (less than 900 MPa), which does not meet the requirements of engineering applications.…”

Section: Introductionmentioning

confidence: 99%

Study on microstructure and wear resistance of Zr-17Nb alloy irradiated by high current pulsed electron beam

Sun

Gao

et al. 2020

Reviews on Advanced Materials Science

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In this paper, the microstructure and wear resistance of Zr-17Nb alloy treated by high current pulsed electron beam were studied in detail. A phase change occurs after pulse treatments using X-Ray Diffraction (XRD) analysis, showing β (Nb) phase and α (Zr) phase transformed by a part of β (Zr, Nb) phase. Also, narrowing and shifting of β (Zr, Nb) diffraction peaks were found. Scanning Electron Microscope (SEM) and metallographic analysis results reveal that the microstructure of alloy surface before high current pulsed electron beam (HCPEB) treatment is composed of equiaxed crystals. But, after 15 and 30 pulse treatments, crater structures are significantly reduced. Besides, it was also found that the alloy surface has undergone eutectoid transformation after 30 pulse treatments, and the reaction of β (Zr, Nb) → αZr + βNb had occurred. Microhardness test results show that microhardness value presents a downward trend as the number of pulses increases, which is mainly due to the coarsening of the grains and the formation of a softer β (Nb) phase after phase transformation. The wear resistance test results show that the friction coefficient increases first, then decreases and then increases with the increase of pulse number.

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Section: Introductionmentioning

confidence: 99%

Study on microstructure and wear resistance of Zr-17Nb alloy irradiated by high current pulsed electron beam

Sun

Gao

et al. 2020

Reviews on Advanced Materials Science

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“…As a typical type of aging hardening alloys, Cu-Cr based alloys have high strength and moderate electrical conductivity, thus they are being applied to contact wires for high speed trains [1][2][3][4], lead frames [5][6][7], heat transfer [1,8], and so on. There are normally two ways to improve the alloy performance-optimization of heat treatment and addition of alloying elements [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

“…There are normally two ways to improve the alloy performance-optimization of heat treatment and addition of alloying elements [9][10][11][12]. For the Cu-Cr based alloys, common alloying elements include Zr [1,13,14], Ag [14][15][16], Mg [6,7,13], and Ti [17][18][19].…”

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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“…Cu-Cr-based alloys are a traditional age-hardening alloy, and are used widely in the fields of contact wires, lead frames and heat exchange because of a good combination of strength properties, electrical conductivity and ductility [1,2]. Alloying element addition [3][4][5], processing, and heat treatment [6][7][8] are major routes to improve performance. Annealing at a specific temperature for precipitation nucleation is an important process to improve the performance, and it is accompanied by a growth of precipitation phases and alloy recovery and recrystallization [9].…”

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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Contribution of Zr to strength and grain refinement in Cu Cr Zr alloy

Cited by 80 publications

References 35 publications

Study on microstructure and wear resistance of Zr-17Nb alloy irradiated by high current pulsed electron beam

Study on microstructure and wear resistance of Zr-17Nb alloy irradiated by high current pulsed electron beam

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

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

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