Properties and Strengthening Mechanisms in Cold-Rolled and Aged Cu–3Ag–0.5Zr Alloy

Krishna, S. Chenna; Gangwar, Narendra Kumar; Jha, Abhay K.; Pant, Bhanu; George, K. E.

doi:10.1007/s13632-014-0147-3

Cited by 19 publications

(3 citation statements)

References 17 publications

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“…The excellent mechanical properties of Cu-Cr system alloys can be attributed to multiple mechanisms, namely, solid solution strengthening, grain boundary strengthening, precipitation hardening, and dislocation strengthening [12]. However, the contribution of grain boundary strengthening in the peak-aging condition can be ignored because the grains are elongated [11].…”

Section: Effects Of Ti On the Mechanical Properties Of Cu-cr Alloymentioning

confidence: 99%

Effect of Ti addition on the microstructure and properties of Cu–Cr alloy

Fang

Liu

Chen

et al. 2021

Materials Science and Technology

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The Cu–Cr–Ti alloys with different Ti contents were prepared by vacuum induction melting, solid solution, cold deformation, and ageing treatment. The microstructures, mechanical, and electrical properties of Cu–Cr–Ti alloys were investigated under different Ti contents. The results indicate that the increase of Ti content can improve the mechanical properties of Cu–Cr–Ti alloys, whereas its conductivity decreases significantly. After cold rolling by 80% and ageing at 500°C for 60 min, the Cu-0.3Cr-0.05Ti alloy with the hardness, electrical conductivity, and tensile strength are 162.6 HV, 82.2% IACS, and 510 MPa, respectively. The strengthening mechanism of the studied alloys is mainly attributed to the Orowan precipitation and dislocation strengthening. The addition of Ti in the ageing process can retard the growth and coarsen Cr precipitates.

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Section: Effects Of Ti On the Mechanical Properties Of Cu-cr Alloymentioning

confidence: 99%

Effect of Ti addition on the microstructure and properties of Cu–Cr alloy

Fang

Liu

Chen

et al. 2021

Materials Science and Technology

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“…The excellent mechanical properties of the Cu-Cr-Ag alloy were mainly attributed to a lot of volume fraction of nanoscaled precipitates that were uniformly dispersed in the matrix during the solution annealing and aging process [26,27]. The yield strength of the alloy depended on three different hardening mechanisms: solid-solution strengthening, precipitation hardening, and dislocation strength [28,29]. Owing to the low solid solution of Cr and Ag in the alloy, solid-solution strengthening could be neglected.…”

Section: Physical Propertiesmentioning

confidence: 99%

Relationship between Microstructure and Properties of Cu–Cr–Ag Alloy

Peng

Xie

et al. 2020

Materials

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The microstructure evolution and properties of a Cu–Cr–Ag alloy during continuous extrusion and an aging process were studied by Scanning Electron Microscope (SEM) and Transmission Electron Microscope (TEM). Owing to strong shear deformation that happened during continuous extrusion with working temperatures of 450 to 480 °C, a larger number of fine grains were obtained. Both face-centered cubic (FCC) and body-centered cubic (BCC) precipitates simultaneously existed in the matrix when aged for 450 °C for 2 h, and the Cr phases with BCC structure had an N–W relationship with the matrix. After continuous extrusion, 60% cold deformation, 875 °C × 1 h solid solution treatment, 60% cold deformation, 450 °C × 2 h aging treatment, and 70% cold deformation, the Cu–Cr–Ag alloy acquired excellent comprehensive properties: tensile strength of 494.4 MPa, yield strength of 487.6 MPa, and electrical conductivity of 91.4% IACS.

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“…The high strength of alloys is due to nanoscale precipitates in the copper matrix during the aging process. The high electrical conductivity results from the low solid solubility of alloying elements [11][12][13][14][15][16][17][18]25]. Krishna et al [13] found that the presence of nanoscale precipitates in the soft matrix significantly improves the strength by resistance the motion of dislocations in the aging process of Cu-3Ag-Zr alloy.…”

Section: Introductionmentioning

confidence: 99%

Effect of aging on properties and nanoscale precipitates of Cu-Ag-Cr alloy

Zhou

Song

Hui

et al. 2020

Nanotechnology Reviews

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AbstractIn this paper, the Cu-0.52Ag-0.22Cr alloy was prepared by hot horizontal continuous casting. The effects of aging process on micro-hardness, electrical conductivity, and nanoscale precipitates of Cu-0.52Ag-0.22Cr alloy were studied. The electrical conductivity and micro-hardness increase significantly in the early aging time. With the extension of aging time, the electrical conductivity is basically unchanged and remains at a high level. While, the micro-hardness increases slowly, the change trend is different at 623 K, 723 K, and 773 K. The optimisation of process parameters occurs in 723 K for 2 h. At this time, the electric conductivity is 95.8% IACS and the hardness is 104.1 HV0.1. The XRD result shows that the Ag and Cr are precipitated in elemental form copper matrix. Further TEM shows that, Cr exists at the sub-boundary in the form of larger nanoscale precipitates (100-200 nm). While a large number of Ag nanoscale precipitates (8-10 nm) is dispersed on the copper matrix. The synergistic effect of Ag and Cr nanoscale precipitates significantly improved the properties of the alloy.

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Properties and Strengthening Mechanisms in Cold-Rolled and Aged Cu–3Ag–0.5Zr Alloy

Cited by 19 publications

References 17 publications

Effect of Ti addition on the microstructure and properties of Cu–Cr alloy

Effect of Ti addition on the microstructure and properties of Cu–Cr alloy

Relationship between Microstructure and Properties of Cu–Cr–Ag Alloy

Effect of aging on properties and nanoscale precipitates of Cu-Ag-Cr alloy

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