Refining of AZ91 Magnesium Alloy Obtained in Machining Chips Recycling

Lucci, Roberto Oscar; Padilla, Roger López; Cantero, Santiago Marcelo; Bariles, Raúl; Oldani, Carlos

doi:10.1016/j.mspro.2015.04.149

Cited by 15 publications

(6 citation statements)

References 2 publications

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“…As can be seen from Figure 4, after the self-corrosion process, there is much white stuff on the sample surfaces, similar to that on the recycled AZ91 magnesium alloys reported by ref. [5]. However, the visual appearance of the recycled as-cast alloy sample after corrosion is quite different from the commercialized alloy.…”

Section: Fig 3 Potentiodynamic Polarization Curves Of As-cast Alloysmentioning

confidence: 97%

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Electrochemical Performances of Recycled AZ31 Magnesium Alloy in NaCl Solution

Li¹,

Zhu²,

Tang³

et al. 2018

Proceedings of the 2018 International Conference on Energy Development and Environmental Protection (EDEP 2018)

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Recycled as-cast magnesium alloys were prepared by smelting method according to the nominal composition of AZ31 magnesium alloys. The structure and electrochemical properties of the recycled alloys were characterized and compared to those of the commercial as-cast AZ31 magnesium alloys. X-ray diffractometry patterns show that the main phases of the recycled alloy are α-Mg solid solutions and the recycled alloys present more Mg 17 Al 12 second phases than the commercialized alloy. Polarization curves results obtained from electrochemical experiments in 5% NaCl solution indicate that the recycled alloy exhibits a bit higher corrosion current density than the commercialized alloy and similar negative equilibrium potential to the commercialized alloy. The recycled alloy performs the higher corrosion rate in 5% NaCl solution and the worse corrosion resistance than the commercialized alloy according to self-corrosion rate and electrochemical impedance spectroscopy measurement results.

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Section: Fig 3 Potentiodynamic Polarization Curves Of As-cast Alloysmentioning

confidence: 97%

“…Thus it is vital to consider the recycling of the abandoned magnesium alloy materials. In fact, using the magnesium productions based on the recycled magnesium alloy materials would lower the materials cost and energy consumption [4,5].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Performances of Recycled AZ31 Magnesium Alloy in NaCl Solution

Li¹,

Zhu²,

Tang³

et al. 2018

Proceedings of the 2018 International Conference on Energy Development and Environmental Protection (EDEP 2018)

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“…Global interest in recycling ferrous and nonferrous metal alloys including magnesium (Mg) metal, has received great attention as of late. This is due to their favorable engineering properties [ 7 , 8 , 9 ]. Its lightness, excellent flexibility and abundance as a natural resource, make Mg a particularly desired material, especially when the overall strength of a material is desired [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

Solid-State Conversion of Magnesium Waste to Advanced Hydrogen-Storage Nanopowder Particles

2020

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Recycling of metallic solid-waste (SW) components has recently become one of the most attractive topics for scientific research and applications on a global scale. A considerable number of applications are proposed for utilizing metallic SW products in different applications. Utilization of SW magnesium (Mg) metal for tailoring high-hydrogen storage capacity nanoparticles has never been reported as yet. The present study demonstrates the ability to produce pure Mg ingots through a melting and casting approach from Mg-machining chips. The ingots were used as a feedstock material to produce high-quality Mg-ribbons, using a melting/casting and spinning approaches. The ribbons were then subjected to severe plastic deformation through the cold rolling technique. The as-cold roll Mg strips were then snipped into small shots before charging them into reactive ball milling. The milling process was undertaken under high-pressure of pure hydrogen gas (H2), where titanium balls were used as milling media. The final product obtained after 100 h of milling showcased excellent nanocrystalline structure and revealed high hydro/dehydrogenation kinetics at moderate temperature (275 °C). The present study shows that primer cold rolling of Mg-strips before reactive ball milling is a necessary step to prepare ultrafine magnesium hydride (MgH2) nanopowders with advanced absorption/desorption kinetics behavior. These ultrafine powders with their nanocrystalline structure are believed to play an important role in effective gas diffusion process. Moreover, the fine titanium particles came from the ball-powder-ball collisions and introduced to the Mg matrix have not only acted as micro-scaled milling media, but they played a vital catalyzation role for the process.

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“…In addition, the aluminum and their alloys possess a good performance, castability, high mechanical strength properties and attractive resistance to electrochemical surface degradation [7][8][9]. Many investigators describe these advantages as primary kind of light alloys since structural design, architectural applications, to combustion engines, until tribological functions [10][11][12][13]. Recently, AlMg alloys have been applied as matrix alloy to composite materials due to their low density and high wettability [14,15].…”

Section: Introductionmentioning

confidence: 99%

Solidification Physics and Microstructure: A Study of AlMg and AlMgSi Alloys by Vortex Method

Rodríguez¹,

Martı́nez²,

Canul³

2018

Solidification

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Physical properties on solidification process deal with the internal atomic arrangement, named generally microstructure. The microstructure characteristic is essential for the properties of metallic materials, including binary, ternary or eutectic alloys. Thus, despite significant progress on microstructural evolution, numerous challenges still exist for revealing the internal structure to act synergistically with matrix alloy chemical components. It is well known that the internal microstructure of an alloy controls and modifies the nature, interaction type and properties of the existing defects and final applications.At this point, necessary understanding of the correlation between equilibrium and nonequilibrium effects, surface energy and chemical potential for the time of the structures formation is probably the key to solidification that can help to predict the complex of microstructures. For the case of multi-phase solidification, AlMgSi alloy involves thousands of atoms, at the atomic scale, that transit to microstructures while the solid-liquid phase transformation occurs. This chapter outlines the role of solidification physics, and the atomic arrangement is believed to have in influencing mechanical hardness properties and degradation resistance.

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Refining of AZ91 Magnesium Alloy Obtained in Machining Chips Recycling

Cited by 15 publications

References 2 publications

Electrochemical Performances of Recycled AZ31 Magnesium Alloy in NaCl Solution

Electrochemical Performances of Recycled AZ31 Magnesium Alloy in NaCl Solution

Solid-State Conversion of Magnesium Waste to Advanced Hydrogen-Storage Nanopowder Particles

Solidification Physics and Microstructure: A Study of AlMg and AlMgSi Alloys by Vortex Method

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