Achieving high strength and high ductility in magnesium alloys using severe plastic deformation combined with low-temperature aging

A novel method of fabricating age-hardenable magnesium alloys with high strength and high ductility was developed using high-ratio differential speed rolling combined with low-temperature aging. The ultrafine-grained Mg–9Al–1Zn alloy processed by this technique exhibited a high yield stress of >4...

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Bibliographic Details
Published in:Scripta materialia 2009-12, Vol.61 (11), p.1040-1043
Main Authors: Kim, W.J., Jeong, H.G., Jeong, H.T.
Format: Article
Language:English
Subjects:
Aging
Ductility
Magnesium alloys
Severe plastic deformation (SPD)
Ultrafine-grained microstructure
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Summary:A novel method of fabricating age-hardenable magnesium alloys with high strength and high ductility was developed using high-ratio differential speed rolling combined with low-temperature aging. The ultrafine-grained Mg–9Al–1Zn alloy processed by this technique exhibited a high yield stress of >400 MPa and tensile elongations of 12–14%. The high strength could be attributed to grain size and particle strengthening effects, while the high ductility could be attributed to weakening of the basal texture component.
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2009.08.020