Evolution of the structure of V95 aluminum alloy upon high-pressure torsion

The effect of the degree of deformation upon torsion under quasi-hydrostatic pressure on the structural and phase transformations in the V95 alloy has been studied by the methods of electron microscopy and X-ray diffraction. It has been found that, upon severe plastic deformation, a nanocrystalline...

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Veröffentlicht in:Physics of metals and metallography 2011-06, Vol.111 (6), p.630-638
Hauptverfasser: Brodova, I. G., Shirinkina, I. G., Petrova, A. N., Antonova, O. V., Pilyugin, V. P.
Format: Artikel
Sprache:eng
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Zusammenfassung:The effect of the degree of deformation upon torsion under quasi-hydrostatic pressure on the structural and phase transformations in the V95 alloy has been studied by the methods of electron microscopy and X-ray diffraction. It has been found that, upon severe plastic deformation, a nanocrystalline structure with a hardness of 2.5 GPa is formed. The nanostructure with a minimum average grain size of 55–80 nm is being formed at e = 5.5–6.4. It has been shown that during dynamical strain aging at e ≥ 4.8, a hardening metastable phase MgZn 2 precipitates from the supersaturated α solid solution, and the quantity of this phase increases with increasing degree of deformation.
ISSN:0031-918X
1555-6190
DOI:10.1134/S0031918X11050036