Deformation Structure of Unidirectionally Compressed Ultrafine-Grained Mg-3Al-1Zn Alloy

Deformation Structure of Unidirectionally Compressed Ultrafine-Grained Mg-3Al-1Zn Alloy

Ultrafine-grained (UFG) Mg-3Al-1Zn (AZ31) alloys with gain sizes ranging from 0.46 to 3.22  μ m were prepared by equal channel angular pressing (ECAP) and annealing. The deformation structure of UFG AZ31 alloy resulting from uniaxial compression was studied by optical and electron microscopy. The de...

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Veröffentlicht in:Metallurgical and materials transactions. A, Physical metallurgy and materials science Physical metallurgy and materials science, 2011-09, Vol.42 (9), p.2909-2916
Hauptverfasser: Lee, W. T., Ding, S. X., Sun, D. K., Hsiao, C. I., Chang, C. P., Chang, L., Kao, P. W.
Format: Artikel
Sprache:eng
Schlagworte:
Alloys
Applied sciences
Characterization and Evaluation of Materials
Chemistry and Materials Science
Compressed
Compressing
Constraining
Deformation
Equal channel angular pressing
Exact sciences and technology
FCC metals
Grain size
Magnesium base alloys
Materials Science
Metallic Materials
Metals. Metallurgy
Nanotechnology
Structural Materials
Surfaces and Interfaces
Thin Films
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Zusammenfassung:Ultrafine-grained (UFG) Mg-3Al-1Zn (AZ31) alloys with gain sizes ranging from 0.46 to 3.22  μ m were prepared by equal channel angular pressing (ECAP) and annealing. The deformation structure of UFG AZ31 alloy resulting from uniaxial compression was studied by optical and electron microscopy. The deformation was noted to proceed with the development of shear bands (SBs), which has not been reported in an UFG hcp metal. Characterization of these SBs was performed, and comparison with the SBs formed in UFG bcc and fcc metals was given. tension twins inside SBs were found in all specimens compressed, irrespective of the grain size. Discussion on the limiting grain size of twinning in the UFG AZ31 alloy is also given.
ISSN:1073-5623
1543-1940
DOI:10.1007/s11661-011-0670-7