X-ray studies of dynamic aging in an aluminum alloy subjected to severe plastic deformation

Journal Article · Tue Dec 15 00:00:00 EST 2015 · Materials Characterization

DOI:https://doi.org/10.1016/J.MATCHAR.2015.10.037· OSTI ID:22587069

Chizhov, P. S. ^[1]; Murashkin, M. Yu. ^[2]; Goidenko, A. A. ^[3]; Valiev, R. Z. ^[2]

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1. Faculty of Chemistry, Moscow State University, 1-3 Leninskiye Gory, Moscow 119991 (Russian Federation)
2. Institute of Physics of Advanced Materials, Ufa State Aviation Technical University, 12K. Marx Str., Ufa 450000 (Russian Federation)
3. Laboratory for Mechanics of Bulk Nanomaterials, Saint Petersburg State University, 28 Universitetsky pr., Saint Petersburg 198504 (Russian Federation)

In this work, X-ray scattering methods were applied for a quantitative characterization of the microstructure of an aluminum alloy of the Al–Mg–Si system during dynamic aging realized through the high pressure torsion technique. A qualitative and quantitative phase analysis of the alloy was performed, together with Al alloy lattice parameter determination. From the reflections broadening the effective size of the coherent scattering domains and the lattice microstrain were determined in the framework of the Halder–Wagner approach. Using the method of small-angle X-ray scattering, the quantitative characteristics of the size, shape and spatial distribution of the secondary phase particles formed in the Al alloy during dynamic aging were established. In order to validate the obtained results, the method of small-angle X-ray scattering was preliminarily tested on similar samples after artificial aging and compared with the results from small-angle neutron diffraction widely known in literature. - Highlights: • Spherical fcc β-Mg2Si precipitates formed in Al 6201 alloy during dynamic aging in the course of severe plastic deformation. • The size, shape and distribution of the precipitates due to artificial and dynamic aging were revealed by SAXS method. • Monoclinic needle-like β' precipitates and Al5FeSi intermetallic phase were detected in 6201 alloy after T6 treatment.

• OSTI ID: 22587069
• Journal Information: Materials Characterization, Vol. 110; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1044-5803
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
77 NANOSCIENCE AND NANOTECHNOLOGY
AGING
ALUMINIUM ALLOYS
FCC LATTICES
LATTICE PARAMETERS
MICROSTRUCTURE
MONOCLINIC LATTICES
NEUTRON DIFFRACTION
PHASE STUDIES
PLASTICITY
PRECIPITATION
SMALL ANGLE SCATTERING
SPATIAL DISTRIBUTION
X-RAY DIFFRACTION