Al2O3 nanoparticle addition to concentrated magnesium alloy AZ81: Enhanced ductility

► Al2O3 nanoparticles were successfully integrated with concentrated magnesium alloy AZ81 in extruded form. ► An enhancement of tensile ductility without significant compromise in strength of alloy AZ81 was observed. ► An enhancement of compressive ductility without significant compromise in strengt...

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Bibliographic Details
Published in:Journal of alloys and compounds 2012-12, Vol.545, p.12-18
Main Authors: Paramsothy, M., Tan, X.H., Chan, J., Kwok, R., Gupta, M.
Format: Article
Language:English
Subjects:
Al2O3 nanoparticle
Alloys
Aluminum oxide
Applied sciences
AZ81 nanocomposite
Dispersion hardening metals
Elasticity. Plasticity
Exact sciences and technology
Magnesium
Magnesium base alloys
Mechanical properties
Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology
Metals. Metallurgy
Microstructure
Nanocomposites
Nanomaterials
Nanostructure
Powder metallurgy. Composite materials
Production techniques
Texture
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Summary:► Al2O3 nanoparticles were successfully integrated with concentrated magnesium alloy AZ81 in extruded form. ► An enhancement of tensile ductility without significant compromise in strength of alloy AZ81 was observed. ► An enhancement of compressive ductility without significant compromise in strength of alloy AZ81 was also observed. This study is aimed at understanding the ductility enhancing function of nanoparticles in a concentrated magnesium alloy (AZ81) nanocomposite. Al2O3 nanoparticles were selected for reinforcement purposes due to the well known affinity between magnesium and oxygen. AZ81 magnesium alloy was reinforced with Al2O3 nanoparticles using solidification processing followed by hot extrusion. The nanocomposite exhibited similar grain size and hardness to the monolithic alloy, reasonable nanoparticle distribution and non-dominant (0002) texture in the longitudinal direction. Compared to the monolithic alloy in both tension and compression, the nanocomposite exhibited higher failure strain (+66% and +18%, respectively) without significant compromise in strength, and higher energy absorbed until fracture (EA) (+71% and +12%, respectively). The beneficial effects of Al2O3 nanoparticle addition on the tensile and compressive ductility enhancement of AZ81 alloy is discussed in this paper.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2012.08.020