Solute clusters and chemistry in a Cu–Cr–Zr–Mg alloy during the early stage of aging

Cheng, Jian; Yu, Fangxin; Shen, B. G.

doi:10.1016/j.matlet.2013.10.055

Cited by 26 publications

(6 citation statements)

References 12 publications

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“…The 3DAP experiments were performed on a LEAP 4000 HR instrument (Cameca, Gennevilliers, France) with a temperature of 50 K and a pulse rate of 200 kHz. The samples for 3DAP analysis were cut into needle-like shape with a size of 0.5 × 0.5 × 20 mm 3 , followed by electro-polishing according to the standard two-stage methods [16].…”

Section: Methodsmentioning

confidence: 99%

Effect of Ni/Si Mass Ratio and Thermomechanical Treatment on the Microstructure and Properties of Cu-Ni-Si Alloys

Li¹,

Huang²,

Mi³

et al. 2019

Materials

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The effect of the Ni/Si mass ratio and combined thermomechanical treatment on the microstructure and properties of ternary Cu-Ni-Si alloys is discussed systematically. The Cu-Ni-Si alloy with a Ni/Si mass ratio of 4–5 showed good comprehensive properties. Precipitates with disc-like shapes were confirmed as the Ni2Si phase with orthorhombic structure through transmission electron microscopy, high-resolution transmission electron microscopy, and 3D atom probe characterization. After the appropriate thermomechanical treatment, the studied alloy with a Ni/Si mass ratio of 4.2 exhibited excellent mechanical properties: a hardness of 290 HV, tensile strength of 855 MPa, yield strength of 782 MPa, and elongation of 4.5%. Compared with other approaches, the thermomechanical treatment increased the hardness and strength without sacrificing electrical conductivity. Theoretical calculations indicated that the high strength was primarily attributed to the Orowan precipitation strengthening and secondarily ascribed to the work hardening, which were highly consistent with the experimental results. The appropriate Ni/Si mass ratio with a low content of Ni and Si atoms shows high strength and excellent electrical conductivity through combined thermomechanical treatment. This work provides a guideline for the design and preparation of multicomponent Cu-Ni-Si-X alloys with ultrahigh strength and excellent electrical conductivity.

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Section: Methodsmentioning

confidence: 99%

Effect of Ni/Si Mass Ratio and Thermomechanical Treatment on the Microstructure and Properties of Cu-Ni-Si Alloys

Li¹,

Huang²,

Mi³

et al. 2019

Materials

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“…The Heusler phase have also been observed in magnesium-containing copperchromium-zirconium alloys and shows the favorable effects of the precipitated phase on performance [10,14,15]. The aging behavior of the copperchromium-zirconium-magnesium alloy have been analyzed by atom probe tomography technology, it showed that atomic clusters in the aging alloy were observed [16]. At the aging time of 4 h, the atomic ratio in observed clusters was 73.57 copper, 11.48 chromium, 1.56 zirconium, 7.09 iron, 2.16 magnesium and 3.16 silicon (at.%).…”

Section: Introductionmentioning

confidence: 93%

Magnesium addition in copper‐chromium alloys: The refinement of aging precipitates and improvement on mechanical properties

Wang

Chen

et al. 2019

Materialwissenschaft Werkst

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Herein, we demonstrate the synthesis of copper‐chromium and copper‐ chromium‐magnesium alloys by melting and casting process and explore the effect of the magnesium addition on mechanical and electrical properties of the alloys. This article focuses on the variation of the precipitation sequence and the decrease of strengthening phase sizes induced by the addition of trace magnesium element. The results show that magnesium element has little effect on the hardness of copper‐chromium alloy, but it significantly improves the hardness of the aging alloy and maintains high conductivity. The addition of magnesium element inhibits the growth and structural transformation of the precipitated phase. The refinement impact of magnesium addition on precipitated phase and change in alloy precipitation sequence may be the main reasons for the high hardness of copper‐chromium‐ magnesium alloy. In addition, the magnesium addition shows a significant refinement effect on small size precipitation phase, but it does not present the same refinement effect on large size precipitation phase. This attributes to the presence of a semi‐coherent interface between the matrix and the large size of precipitates, which provides the dislocation‐based diffusion channels for high‐rate chromium diffusion and promotes the precipitate growth.

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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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Solute clusters and chemistry in a Cu–Cr–Zr–Mg alloy during the early stage of aging

Cited by 26 publications

References 12 publications

Effect of Ni/Si Mass Ratio and Thermomechanical Treatment on the Microstructure and Properties of Cu-Ni-Si Alloys

Effect of Ni/Si Mass Ratio and Thermomechanical Treatment on the Microstructure and Properties of Cu-Ni-Si Alloys

Magnesium addition in copper‐chromium alloys: The refinement of aging precipitates and improvement on mechanical properties

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

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