Interrelation of Microstructure and Corrosion Resistance in Biodegradable Magnesium Alloys with Aluminum, Lithium and Rare Earth Additions

Minárik, Peter; Landa, Michal; Lesná, I. Králová; Zemková, Mária; Jablonská, Eva; Hadzima, Branislav; Janeček, Miloš; Král, Róbert

doi:10.12693/aphyspola.128.491

Cited by 5 publications

(3 citation statements)

References 36 publications

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“… Corrosion rate reported in samples of magnesium processed via ECAP [ 52 , 55 , 56 , 57 , 58 , 59 , 61 , 62 , 63 , 64 , 65 , 66 , 67 , 69 , 71 , 73 , 74 , 75 , 76 , 77 , 78 , 79 , 80 , 82 , 83 , 84 , 85 , 86 , 87 ] and HPT [ 19 , 88 , 90 , 91 , 92 , 93 , 94 , 95 , 97 , 98 , 99 , 100 ] plotted as a function of the grain size. …”

Section: Figurementioning

confidence: 99%

An Overview on the Effect of Severe Plastic Deformation on the Performance of Magnesium for Biomedical Applications

et al. 2023

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There has been a great interest in evaluating the potential of severe plastic deformation (SPD) to improve the performance of magnesium for biological applications. However, different properties and trends, including some contradictions, have been reported. The present study critically reviews the structural features, mechanical properties, corrosion behavior and biological response of magnesium and its alloys processed by SPD, with an emphasis on equal-channel angular pressing (ECAP) and high-pressure torsion (HPT). The unique mechanism of grain refinement in magnesium processed via ECAP causes a large scatter in the final structure, and these microstructural differences can affect the properties and produce difficulties in establishing trends. However, the recent advances in ECAP processing and the increased availability of data from samples produced via HPT clarify that grain refinement can indeed improve the mechanical properties and corrosion resistance without compromising the biological response. It is shown that processing via SPD has great potential for improving the performance of magnesium for biological applications.

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Section: Figurementioning

confidence: 99%

An Overview on the Effect of Severe Plastic Deformation on the Performance of Magnesium for Biomedical Applications

et al. 2023

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“…In contrast, electrochemical measurements took place at pre-defined immersion times, i.e., corrosion processes have already been realized for some time, and thus short-term processes could remain undiscovered. Therefore, AE can provide missing information about the development of corrosion processes with high time resolution [44][45][46][47][48]. In addition, propagation of the corrosion layer is studied by backscattered electron (BSE) imaging and grain orientation mapping on the cross-section of the specimens.…”

Section: Introductionmentioning

confidence: 99%

Revealing the Microstructural Aspects of the Corrosion Dynamics in Rapidly Solidified Mg-Zn-Y Alloys Using the Acoustic Emission Technique

et al. 2021

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This work was focused on revealing the relation between the microstructure and corrosion dynamics in dilute Mg97.94Zn0.56Y1.5 (at.%) alloys prepared by the consolidation of rapidly solidified (RS) ribbons. The dynamics of the corrosion were followed by common electrochemical methods and the acoustic emission (AE) technique. AE monitoring offers instantaneous feedback on changes in the dynamics and mode of the corrosion. In contrast, the electrochemical measurements were performed on the specimens, which had already been immersed in the solution for a pre-defined time. Thus, some short-term corrosion processes could remain undiscovered. Obtained results were completed by scanning electron microscopy, including analysis of a cross-section of the corrosion layer. It was shown that the internal strain distribution, the grain morphology, and the distribution of the secondary phases play a significant role in the corrosion. The alloys are characterized by a complex microstructure with elongated worked and dynamically recrystallized α-Mg grains with an average grain size of 900 nm. Moreover, the Zn- and Y-rich stacking faults (SFs) were dispersed in the grain interior. In the alloy consolidated at a lower extrusion speed, the homogeneous internal strain distribution led to uniform corrosion with a rate of 2 mm/year and a low hydrogen release. The consolidation at a higher extrusion speed resulted in the formation of uneven distribution of internal strains with remaining high strain levels in non-recrystallized grains, leading to inhomogeneous growth and breakdown of the corrosion layers. Therefore, homogeneity of the internal strain distribution is of key importance for the uniform formation of a protective layer.

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“…A recent review paper of Esmaily et al [32] and references therein bear witness that the AE technique is widely omitted in the corrosion studies of magnesium and its alloys even though it can provide unique in-situ information, which can be hardly revealed by commonly used electrochemical, imaging, and spectroscopy methods. There is a very limited number of AE studies concerning corrosion in magnesium [10,[33][34][35] and these existing papers evaluate only basic AE parameters.…”

Section: Introductionmentioning

confidence: 99%

Corrosion of pure magnesium and a WE43 magnesium alloy studied by advanced acoustic emission analysis

et al. 2018

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Corrosion behaviour of magnesium and WE43 magnesium alloy in 1 M NaCl aqueous solution was studied by potentiodynamic polarisation and advanced acoustic emission (AE) analyses. The AE parameters suitable for the monitoring of corrosion in magnesium were shown to be the AE counts, rise time, and duration. Moreover, the mechanisms of corrosion in these materials, i.e. the ion exchange, rupture of the protective film, and the pitting corrosion were identified and their evolution was followed by the novel Adaptive sequential k-means clustering technique. The presented methods can be also suitable for monitoring of different materials and for industrial applications.

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Interrelation of Microstructure and Corrosion Resistance in Biodegradable Magnesium Alloys with Aluminum, Lithium and Rare Earth Additions

Cited by 5 publications

References 36 publications

An Overview on the Effect of Severe Plastic Deformation on the Performance of Magnesium for Biomedical Applications

An Overview on the Effect of Severe Plastic Deformation on the Performance of Magnesium for Biomedical Applications

Revealing the Microstructural Aspects of the Corrosion Dynamics in Rapidly Solidified Mg-Zn-Y Alloys Using the Acoustic Emission Technique

Corrosion of pure magnesium and a WE43 magnesium alloy studied by advanced acoustic emission analysis

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