Mechanical Properties of Magnesium-Rare Earth Alloy Systems: A Review

Tekumalla, Sravya; Seetharaman, Sankaranarayanan; Almajid, Abdulhakim A.

doi:10.3390/met5010001

Cited by 167 publications

(73 citation statements)

References 111 publications

(132 reference statements)

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“…These results obtained in this study are in good agreement with other available reports claiming La as an excellent grain refiner in Mg [23,24]. The reinforcement of nano-sized thermally stable 1.9% Y2O3 powder to Mg-3Al-2.5La further reduced the grain size as Y2O3 nanoparticles can act as the nucleation sites during solidification and recrystallization besides pinning the grain boundaries in the later stages.…”

Section: Microstructural Characterizationsupporting

confidence: 82%

Improved Compressive, Damping and Coefficient of Thermal Expansion Response of Mg–3Al–2.5La Alloy Using Y2O3 Nano Reinforcement

Kumar

Tun

Kohadkar

et al. 2017

Metals

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Abstract:In the present study, the effects of the addition of Y 2 O 3 nanoparticles on Mg-3Al-2.5La alloy were investigated. Materials were synthesized using a disintegrated melt deposition technique followed by hot extrusion. The samples were then characterized for microstructure, compression properties, damping properties, CTE (coefficient of thermal expansion) and fracture morphology. The grain size of Mg-3Al-2.5La was significantly reduced by the addition of the Y 2 O 3 nano-sized reinforcement (~3.6 µm, 43% of Mg-3Al-2.5La grain size). SEM and X-ray studies revealed that the size of uniformly distributed intermetallic phases, Al 11 La 3 , Al 2 La, and Al 2.12 La 0.88 reduced by the addition of Y 2 O 3 to Mg-3Al-2.5La alloy. The coefficient of thermal expansion (CTE) was slightly improved by the addition of nanoparticles. The results of the damping measurement revealed that the damping capacity of the Mg-3Al-2.5La alloy increased due to the presence of Y 2 O 3 . The compression results showed that the addition of Y 2 O 3 to Mg-3Al-2.5La improved the compressive yield strength (from~141 MPa to~156 MPa) and the ultimate compressive strength (from~456 MPa to~520 MPa), which are superior than those of the Mg-3Al alloy (Compressive Yield Strength, CYS~154 MPa and Ultimate Compressive Strength, UCS~481 MPa). The results further revealed that there is no significant effect on the fracture strain value of Mg-3Al-2.5La due to the addition of Y 2 O 3 .

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Section: Microstructural Characterizationsupporting

confidence: 82%

Improved Compressive, Damping and Coefficient of Thermal Expansion Response of Mg–3Al–2.5La Alloy Using Y2O3 Nano Reinforcement

Kumar

Tun

Kohadkar

et al. 2017

Metals

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“…Mg, with a density of 1.738 g/cm 3 , is one of the lightest engineering and structural metals available on the earth, with its density being about two-thirds that of aluminium and one-fourth that of steel [2]. Therefore, there is an increasing interest in the usage of Mg in certain engineering industries, specifically in the automobile, electronic, and aviation industries.…”

Section: Introductionmentioning

confidence: 99%

Nano-ZnO Particles’ Effect in Improving the Mechanical Response of Mg-3Al-0.4Ce Alloy

Tekumalla

Farhan

Srivatsan

et al. 2016

Metals

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Magnesium based nanocomposites, due to their excellent dimensional stability and mechanical integrity, have a lot of potential to replace the existing commercial Al alloys and steels used in aerospace and automotive applications. Mg-Al alloys are commercially used in the form of AZ (magnesium-aluminum-zinc) and AM (magnesium-aluminum-manganese) series in automobile components. However, the Mg 17 Al 12 phase in Mg-Al alloys is a low melting phase which results in a poor creep and high temperature performance of the alloys. Rare earth additions modify the phase and hence improve the properties of the materials. In this paper, Ce and nano ZnO particles were added to Mg-Al alloys to attain a favorable effect on their properties. The developed materials exhibited promising properties in terms of thermal expansion coefficient (CTE), hardness, and tensile strength. Further, the ZnO addition refined the microstructure and helped in obtaining a uniform distribution, however without grain size refinement. The increased addition of ZnO and the improvement in the distribution led to an enhancement in the properties, rendering the materials suitable for a wide spectrum of engineering applications.

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“…Rare earth elements such as yttrium, cerium, gadolinium and lanthanum are a natural choice to mitigate ignition and corrosion of materials [33]. Tremendous academic research is also ongoing to harness the use of other elements such as aluminum, zinc, and calcium as these are most effective and more environment friendly when compared to rare earths [1,34].…”

Section: Innovations In Magnesium Based Materialsmentioning

confidence: 99%