Effect of chromium content on precipitation in Cu–Cr–Zr alloys

Bodyakova, Anna; Mishnev, Roman; Belyakov, Andrey; Kaibyshev, Rustam

doi:10.1007/s10853-022-07454-8

Cited by 18 publications

(3 citation statements)

References 56 publications

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“…The alloy was solution treated at 920 • C for 1 h followed by water quenching and then aged at 500 • C for 4 h. The starting microstructure was characterized by an average grain size of about 100 µm (Figure 1a) and the finely dispersed particles with a size of 9 nm (Figure 1b) and volume fraction of 6.72 × 10 −4 as revealed through decomposition of solid solution according to the Matthiessen's equation [13,17]. The precipitates in this alloy are mainly represented by Cr-rich particles as have been detailed elsewhere [13]. The rod samples with a cross section of 11 × 11 mm 2 were subjected to ECAE-Conform by the so-called route A [31,32] with channel intersection at 120 • .…”

Section: Methodsmentioning

confidence: 99%

“…The UFG microstructure with a high dislocation density increases the strength by a factor of 2-3 with a slight decrease in electrical conductivity by 5-10% IACS [3][4][5][6][7][8][9][10][11]. Dispersed particles are effective obstacles to the movement of grain boundaries and dislocations, providing thermal stability of the material and strengthening it [12][13][14][15][16]. On the other hand, the particle precipitation removes the solutes from the copper matrix and increases the electrical conductivity of the alloy [17,18].…”

Section: Introductionmentioning

confidence: 99%

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Regularities of Microstructure Evolution in a Cu-Cr-Zr Alloy during Severe Plastic Deformation

et al. 2022

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The effect of severe plastic deformation by the conforming process of equal channel angular extrusion (ECAE-Conform) followed by cold rolling on the microstructures developed in a Cu-0.1Cr-0.1Zr alloy was investigated. Following the ECAE-Conform of 1 to 8 passes (corresponding strains were 0.8 to 6.4) cold rolling to a total strain of 4 was accompanied by substantial grain refinement and strengthening. An average grain size tended to approach 160 nm with an increase in the rolling reduction. An increase in the ECAE-Conform strain promoted the grain refinement during subsequent cold rolling. The fraction of the ultrafine grains with a size of 160 nm after cold rolling to a strain of 4 increased from 0.12 to 0.52 as the number of ECAE-Conform passes increased from 1 to 8. Correspondingly, the yield strength increased above 550 MPa. The strengthening could be expressed by a Hall–Petch type relationship with a grain size strengthening factor of 0.11 MPa m0.5.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Regularities of Microstructure Evolution in a Cu-Cr-Zr Alloy during Severe Plastic Deformation

et al. 2022

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“…During the reaction, the activation energy for a growth-capable fcc nucleus is beneficial [12], whereas the continuously growing precipitates later strive for their stable bcc equilibrium structure [10,11,13,14]. For larger incoherent precipitates (8-10 nm), the Orowan mechanism contributes to the strengthening effect, whereas the cutting mechanism dominates for smaller particles (3-4.5 nm) [15][16][17].…”

Section: Precipitation Of Binary Alloys: Cucrmentioning

confidence: 99%

Analyzing the Precipitation Effects in Low-Alloyed Copper Alloys Containing Hafnium and Chromium

Dölling,

Kuglstatter,

Prahl

et al. 2024

Metals

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Copper alloys containing chromium and hafnium combine elevated mechanical strength and high electrical and thermal conductivity. For the simultaneous enhancement of both material properties, precipitation hardening is the utilized mechanism. Therefore, the aim is to analyze the influence of chromium and hafnium in binary and ternary low-alloyed copper alloys and to compare the precipitation processes during temperature exposure. Atom probe tomography (APT) and differential scanning calorimetry (DSC) measurements enable to understand the precipitation sequence in detail. CuCr0.7 starts to precipitate directly, whereas CuHf0.7 is highly influenced by prior diffusion facilitating cold rolling. Within the ternary alloy, hafnium atoms accumulate at the shell of mainly Cr-containing precipitates. Increasing the local hafnium concentration results in the formation of intermetallic CuHf precipitates at the sites of mainly Cr-containing precipitates. Indirect methods are utilized to investigate the materials’ properties and show the impact of cold rolling prior to an aging treatment on binary alloys CuCr and CuHf. Finally, ternary alloys combine the benefits of facilitated precipitation processes and decelerated growing and coarsening, which classifies the alloys to be applicable for usage at elevated temperatures.

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Microstructure and Properties of Cu – Cr – Zr Alloys After Plastic Deformation and Aging

Bodyakova,

Mishnev,

Kaibyshev

2024

Met Sci Heat Treat

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Effect of chromium content on precipitation in Cu–Cr–Zr alloys

Cited by 18 publications

References 56 publications

Regularities of Microstructure Evolution in a Cu-Cr-Zr Alloy during Severe Plastic Deformation

Regularities of Microstructure Evolution in a Cu-Cr-Zr Alloy during Severe Plastic Deformation

Analyzing the Precipitation Effects in Low-Alloyed Copper Alloys Containing Hafnium and Chromium

Microstructure and Properties of Cu – Cr – Zr Alloys After Plastic Deformation and Aging

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