Structure and orientation relationship of new precipitates in a Cu–Cr–Zr alloy

Chen, Xiaobo; Jiang, Feng; Liu, Lele; Huang, Hongfeng; Shi, Zhang

doi:10.1080/02670836.2017.1376428

Cited by 16 publications

(6 citation statements)

References 32 publications

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“…3. Highly similar observations were reported in the literature [5,12,32,39,40]. In these reports, such particles were identified as Cr clusters.…”

Section: Resultssupporting

confidence: 89%

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Cr cluster characterization in Cu-Cr-Zr alloy after ECAP processing and aging using SANS and HAADF-STEM

Abib¹,

Azzeddine²,

Alili³

et al. 2020

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The precipitation of nano-sized Cr clusters was investigated in a commercial Cu-1Cr-0.1Zr (wt.%) alloy processed by equal-channel angular pressing and subsequent aging at 550 • C for 4 h using Small-Angle Neutron Scattering (SANS) measurements and High-Angle Annular Dark-Field-Scanning Transmission Electron Microscopy (HAADF-STEM). The size and volume fraction of the nano-sized Cr clusters were estimated using both techniques. The parameter values assessed by SANS (d ∼ 3.2 nm, Fv ∼ 1.1 %) agreed reasonably with those by HAADF-STEM (d ∼ 2.5 nm, Fv ∼ 2.3 %). In addition to the nano-sized Cr clusters, HAADF-STEM indicated the presence of rare cuboid and spheroid sub-micronic Cr particles measuring approximately 380-620 nm in mean size. Both techniques did not evidence the presence of intermetallic CuxZry phases within the aging conditions.

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“…3. Highly similar observations were reported in the literature [5,12,32,39,40]. In these reports, such particles were identified as Cr clusters.…”

Section: Resultssupporting

confidence: 89%

“…The size of the Cr cluster (diameter 3.3-2.5 nm), as determined by SANS and HAADF-STEM, falls within the range of those assessed by many authors [12,18,39,40]. The volume fraction found by SANS is in agreement with the initial Cr content of the alloys, indicating the precipitation of all Cr atoms.…”

Section: Resultssupporting

confidence: 84%

Cr cluster characterization in Cu-Cr-Zr alloy after ECAP processing and aging using SANS and HAADF-STEM

Abib¹,

Azzeddine²,

Alili³

et al. 2020

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“…As previously mentioned, the SADP analysis (Figure 7) indicated that the disc-shaped precipitates formed during aging in the Cu–Cr–Ag alloy were fcc Cr-rich phases (lattice parameter is about 0.423 nm), which is consistent with previous observations for Cu–Cr alloy [14] and Cu–Cr–Zr alloys [15,26]. Furthermore, the precipitates in Cu–Cr alloys were identified as Cr-rich clusters by Chbihi et al using APT [13].…”

Section: Discussionsupporting

confidence: 90%

Mechanical properties and microstructural evolution of a Cu–Cr–Ag alloy during thermomechanical treatment

Yuan

Wang

Chen

et al. 2018

Materials Science and Technology

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The microstructure and mechanical properties of a Cu–Cr–Ag alloy at the different processing stages were investigated using hardness measurements, scanning electron microscopy, and transmission electron microscopy. The combined effects of dislocation strengthening and precipitation strengthening were shown to remarkably enhance the hardness of the alloy. Coherent Cr-rich precipitates with a face-centred cubic structure, formed during aging, were shown to be the main source of age strengthening, and the introduction of pre-deformation led to acceleration of their precipitation. Nevertheless, recovery occurring during aging caused significant softening in the cold-drawn samples. Analysis of the microstructural evolution during cold drawing and aging was used as an effective tool to optimise the thermomechanical process and improve the mechanical properties.

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“…4), but they become incoherent with over-ageing and thus tend towards 3. This has been independently observed by TEM on peak-aged and overaged samples (Batra et al, 2003;Chen, Jiang, Liu et al, 2018;Jha et al, 2021). Note that coherent and incoherent here refer to the condition of the precipitate interface, not the type of neutron-nucleus interaction.…”

Section: Resultsmentioning

confidence: 59%

Small-angle neutron scattering from CuCrZr coupons and components

Schoofs¹,

King²,

Cackett³

et al. 2021

J Appl Cryst

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Small-angle neutron scattering (SANS) is performed to analyse the microstructural state of a reference CuCrZr material with carefully controlled heat treatments, small-scale manufacturing mock-ups of assemblies and high-heat-flux-exposed mock-ups for fusion reactor components. The information derived from the SANS data corresponds well to existing literature data based on microscopic-scale techniques, but is obtained at millimetre scale with minimal surface preparation. The manufacturing method and high-heat-flux testing conditions are confirmed to have little impact on the microstructural properties, demonstrating the validity of these treatments for scaled-up reactor components.

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Structure and orientation relationship of new precipitates in a Cu–Cr–Zr alloy

Cited by 16 publications

References 32 publications

Cr cluster characterization in Cu-Cr-Zr alloy after ECAP processing and aging using SANS and HAADF-STEM

Cr cluster characterization in Cu-Cr-Zr alloy after ECAP processing and aging using SANS and HAADF-STEM

Mechanical properties and microstructural evolution of a Cu–Cr–Ag alloy during thermomechanical treatment

Small-angle neutron scattering from CuCrZr coupons and components

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