Atomic structure of solute clusters in Al–Zn–Mg alloys

Lervik, Adrian; Thronsen, Elisabeth; Friis, Jesper; Marioara, Calin Daniel; Wenner, Sigurd; Bendo, Artenis; Matsuda, Kenji; Holmestad, Randi; Andersen, Sigmund Jarle

doi:10.1016/j.actamat.2020.116574

Cited by 57 publications

(17 citation statements)

References 55 publications

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“…Based on the diffraction pattern, all the α‐ magnesium peaks are quite broad, and the microstructures present a kind of peak splitting (dashed blue arrow) on the left side and shouldering (full blue arrow) on the right side. The peak splitting is observed in the sample of SS380‐12 condition, which indicates a non‐uniform lattice distortion by the formed intermetallic phase [40]. The asymmetry of the x‐ray diffraction pattern confirms that the microstructures have heterogeneous chemical compositions [41].…”

Section: Resultsmentioning

confidence: 75%

Reactive sintering principle and compressive properties of porous AZ91 magnesium alloy foams produced by powder metallurgy approach

Agbedor

Yang

Chen

et al. 2022

Materialwissenschaft Werkst

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Porous magnesium alloy foams have gained tremendous interest from scientists because of their super lightweight, unique mechanical and physical properties. Despite numerous studies suggesting these advanced materials for structural and functional applications, their manufacturing processes remain poorly understood. In this paper, the porous Mg‐9 wt. %Al‐1 wt. % Zn alloy foam was prepared through the reactive sintering principle (i. e. the element metal powder reaction principle) by using the powder metallurgical method that is combined with a pore‐making agent. The chemical and phase compositions of the cell wall microstructure were investigated by X‐ray diffraction and scanning electron microscope equipped with energy dispersive spectrometer. The compressive properties of the foams were evaluated by quasi‐static compression testing. The results of the analysis reveal that low‐temperature sintering can produce qualitative magnesium alloy foams with good mechanical properties by taking advantage of the intermetallic/or intermediate compounds which are formed in the cell wall through metal elements powder diffusion and reaction. Particularly, the foam samples sintered at 380 °C for 12 h gave the best compressive properties owing to the alloy intermetallic contents and the relative density of the foams.

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Section: Resultsmentioning

confidence: 75%

Reactive sintering principle and compressive properties of porous AZ91 magnesium alloy foams produced by powder metallurgy approach

Agbedor

Yang

Chen

et al. 2022

Materialwissenschaft Werkst

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show abstract

“…Obviously, such a description poses the question of how to deal with the transition to more classical descriptions of precipitates during later stages of phase transformations. [87].…”

Section: Definition Of Precipitatesmentioning

confidence: 99%

Precipitation kinetics in metallic alloys: Experiments and modeling

2021

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“…Understanding the atomic structure and the dispersion of these clusters in the Al matrix is important for alloy design and thermomechanical processing to obtain desired properties. The clusters are typically spherical with a diameter of 1-3 nm [1,2]. Due to the small size of the clusters compared to a typical Transmission Electron Microscope (TEM) specimen thickness, the cluster to Al signal ratio is low.…”

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confidence: 99%

“…Both scanning precession electron diffraction (SPED) and scanning convergent beam electron diffraction (SCBED) were performed on an Al-Zn-Mg alloy in a condition containing clusters. Recently, the crystal structure of clusters in the Al-Zn-Mg alloy system, the so-called GPI zones, was elucidated based primarily on high-angle annular darkfield scanning TEM (HAADF-STEM) images [1]. With this technique, the atomic columns of the GPI zones were resolved along its principal axis.…”

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confidence: 99%