Journal ArticleDOI
Early-stage precipitation in Al-Zn-Mg-Cu alloy (7050)
Gang Sha,Alfred Cerezo +1 more
TLDR
In this paper, the formation of metastable platelets in early-stage precipitation of a 7050 Al alloy aged at 121 °C was investigated using transmission electron microscopy, together with 3-dimensional atom probe analysis.About:
This article is published in Acta Materialia.The article was published on 2004-09-06. It has received 597 citations till now.read more
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Simultaneously Increasing the Ductility and Strength of Nanostructured Alloys
TL;DR: In this article, the authors reported a strategy to simultaneously increase the ductility and strength of bulk nanostructured materials, by engineering very small second-phase particles into a nanometre Al alloy matrix, while further gaining rather than sacrificing its yield strength.
Journal ArticleDOI
Influence of alloy composition and heat treatment on precipitate composition in Al–Zn–Mg–Cu alloys
TL;DR: In this article, the composition of precipitates in three alloys of the Al-Zn-Mg-Cu system has been investigated for different heat treatments, including peak-aged and over-aged states as well as near-equilibrium conditions, by combining atom probe tomography and systematic anomalous small-angle X-ray scattering experiments.
Journal ArticleDOI
Structure-property correlations in Al 7050 and Al 7055 high-strength aluminum alloys
TL;DR: In this article, the information available from different studies conducted on alloys Al 7050 and Al 7055 was collated to prepare maps that are intended to serve as guides to design aluminum alloys with desired combination of properties.
Journal ArticleDOI
Influence of equal-channel angular pressing on precipitation in an Al–Zn–Mg–Cu alloy
Gang Sha,Yanbo Wang,Xiaozhou Liao,Zhi Chao Duan,Simon P. Ringer,Terence G. Langdon,Terence G. Langdon +6 more
TL;DR: In this article, it was shown by transmission electron microscopy that equal-channel angular pressing (ECAP) affects the morphology of precipitates in an Al-Zn-Mg-Cu alloy.
Journal ArticleDOI
Secondary ageing in an aluminium alloy 7050
TL;DR: In this article, a combined transmission electron microscopy (TEM) and differential scanning calorimetry (DSC) study has shown that secondary ageing at 65°C results in evolution of the GPI zones formed during underageing into the η ′ phase.
References
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Atom probe tomography
TL;DR: In this paper, a focused ion beam milling system was used for atom probe tomography for the characterization of the size, morphology and composition of ultrafine features in a variety of materials.
Journal ArticleDOI
GP-zones in Al–Zn–Mg alloys and their role in artificial aging
L.K Berg,J. Gjønnes,V. Hansen,X.Z. Li,M Knutson-Wedel,G. Waterloo,Dominique Schryvers,L.R. Wallenberg +7 more
TL;DR: In this article, the structure of GP-zones in an industrial, 7xxx-series Al-Zn-Mg alloy has been investigated by transmission electron microscopy methods: selected area diffraction, conventional and high-resolution imaging.
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Pre-precipitate clusters and precipitation processes in Al-Mg-Si alloys
Mitsuhiro Murayama,Kazuhiro Hono +1 more
TL;DR: In this paper, a three-dimensional atom probe (3DAP) and transmission electron microscopy (TEM) was used to characterize the solute clusters and the metastable precipitates in aged Al-Mg-Si alloys.
Journal ArticleDOI
Crystal structure and stability of complex precipitate phases in Al–Cu–Mg–(Si) and Al–Zn–Mg alloys
TL;DR: In this article, first-principles total energy calculations were used to elucidate both the crystal structures and formation enthalpies of complex precipitates in multicomponent Al alloys.
Journal ArticleDOI
A procedure for quantification of precipitate microstructures from three-dimensional atom probe data
TL;DR: New analysis software for selecting and quantifying particles in three-dimensional atom maps has been designed and examples are presented on the application of this new software to the analysis of early stage clustering in an Al-Mg-Si-Cu alloy and a copper-containing steel.