Retaining meta-stable fcc-Cr phase by restraining nucleation of equilibrium bcc-Cr phase in CuCrZrTi alloys during ageing

Wang, Hang; Gong, Liukui; Liao, Jinfa; Chen, Huiming; Xie, Wei; Yang, Bin

doi:10.1016/j.jallcom.2018.03.238

Cited by 55 publications

(14 citation statements)

References 20 publications

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“…The particles of this phase are noneshearable despite of coherent or semi-coherent interfaces [50], since the shearing leads to the formation of anti-phase boundary within the sheared particle that provide a high shear resistance. Note here, the formation of Cu 5 Zr particles with {011} Cu habit plane due to B additives to a Cu-Zr alloy has been recently reported [94]. Also, Cu x Zr y precipitates with intermetallic structure and ellipsoid shape have been observed in Cu-Cr alloys concurrently with Cu 5 Zr particles.…”

Section: Sssssupporting

confidence: 59%

Microstructure and Properties of Fine Grained Cu-Cr-Zr Alloys after Termo-Mechanical Treatments

Morozova

Mishnev

Belyakov

et al. 2018

Reviews on Advanced Materials Science

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Cu-Cr-Zr alloys provide an excellent combination of strength and electric conductivity and are frequently used as engineering materials in various electric/electronic devises. The present review deals with the microstructural design of Cu-Cr-Zr alloys, their alloying concept, thermo-mechanical processing based on technique of severe plastic deformation, physical mechanisms responsible for high strength and electric conductivity. The influences of microstructure and a dispersion of secondary phases on the mechanical properties and electric conductivity are discussed in detail. First, precipitation sequences during aging that leads to depletion of Zr and Cr solutes from Cu solution are critically reviewed in close connection with interaction mechanisms between dislocations and particles. Then, the main structure-property relationships of Cu-Cr-Zr alloys are considered. Finally, the strengthening of Cu-Cr-Zr alloys through severe plastic deformation by means of submicrocrystalline/nanocrystalline structure and increasing dislocation density as well as the effects of post-deformation heat treatment on the mechanical and electric properties are discussed.

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Section: Sssssupporting

confidence: 59%

Microstructure and Properties of Fine Grained Cu-Cr-Zr Alloys after Termo-Mechanical Treatments

Morozova

Mishnev

Belyakov

et al. 2018

Reviews on Advanced Materials Science

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“…Figure 4b,d suggests that the nanoscaled Cr-rich precipitate phase [11,12] distributes homogeneously in the matrix and the distribution density is basically the same. The fine particles with coffee-bean contrasts [14,15] are ~5 nm after annealing for 60 min. However, Figure 4d shows that the nanoscaled Cr-rich precipitates with an average size of 7 nm present coffee-bean and sphere-like morphologies [14,15] after annealing for 240 min.…”

Section: Microstructure Evolutionmentioning

confidence: 99%

“…The fine particles with coffee-bean contrasts [14,15] are ~5 nm after annealing for 60 min. However, Figure 4d shows that the nanoscaled Cr-rich precipitates with an average size of 7 nm present coffee-bean and sphere-like morphologies [14,15] after annealing for 240 min. Figure 5 shows TEM images of the annealed Cu-Cr-In alloy structure and Cr-rich precipitates at 550 °C for 60 min and 240 min.…”

Section: Microstructure Evolutionmentioning

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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“…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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Retaining meta-stable fcc-Cr phase by restraining nucleation of equilibrium bcc-Cr phase in CuCrZrTi alloys during ageing

Cited by 55 publications

References 20 publications

Microstructure and Properties of Fine Grained Cu-Cr-Zr Alloys after Termo-Mechanical Treatments

Microstructure and Properties of Fine Grained Cu-Cr-Zr Alloys after Termo-Mechanical Treatments

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

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

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