Development of extraordinary high-strength Mg–8Al–0.5Zn alloy via a low temperature and slow speed extrusion

Development of extraordinary high-strength Mg–8Al–0.5Zn alloy via a low temperature and slow speed extrusion

An extraordinary high strength Mg–8Al–0.5Zn alloy has been developed through extrusion at a low temperature of 200°C and a slow speed of 0.07mm/s. The as-extruded alloy exhibited a tensile yield strength of 403MPa, an ultimate tensile strength of 437MPa, an elongation of 10.7%, and a low tension-com...

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Veröffentlicht in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2014-07, Vol.610, p.445-449
Hauptverfasser: Yu, Hui, Park, Sung Hyuk, You, Bong Sun
Format: Artikel
Sprache:eng
Schlagworte:
Alloy development
Applied sciences
Cold working, work hardening
annealing, quenching, tempering, recovery, and recrystallization
textures
Cross-disciplinary physics: materials science
rheology
Dynamic recrystallization
Elasticity. Plasticity
Exact sciences and technology
Extrusion
Extrusion rate
Magnesium alloys
Magnesium base alloys
Materials science
Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology
Metals. Metallurgy
Nanostructure
Other heat and thermomechanical treatments
Phase diagrams and microstructures developed by solidification and solid-solid phase transformations
Physics
Precipitation
Surface layer
Tensile properties
Texture
Treatment of materials and its effects on microstructure and properties
Yield strength
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Zusammenfassung:An extraordinary high strength Mg–8Al–0.5Zn alloy has been developed through extrusion at a low temperature of 200°C and a slow speed of 0.07mm/s. The as-extruded alloy exhibited a tensile yield strength of 403MPa, an ultimate tensile strength of 437MPa, an elongation of 10.7%, and a low tension-compression yield asymmetry of 0.97. These superior mechanical properties are attributed to the combined effect of ultra-fine recrystallized grains, numerous nano-scale Mg17Al12 precipitates, and strong basal texture.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2014.05.058