Enhancing the Mechanical Properties of Biodegradable Mg Alloys Processed by Warm HPT and Thermal Treatments

In this study, several biodegradable Mg alloys (Mg5Zn, Mg5Zn0.3Ca, Mg5Zn0.15Ca, and Mg5Zn0.15Ca0.15Zr, numbers in wt%) were investigated after thermomechanical processing via high-pressure torsion (HPT) at elevated temperature as well as after additional heat treatments. Indirect and direct analyses...

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Autores principales:	Andrea Mizelli-Ojdanic, Jelena Horky, Bernhard Mingler, Mattia Fanetti, Sandra Gardonio, Matjaz Valant, Bartosz Sulkowski, Erhard Schafler, Dmytro Orlov, Michael J. Zehetbauer
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	severe plastic deformation (SPD) precipitates vacancy agglomerates magnesium alloys biodegradability Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Acceso en línea:	https://doaj.org/article/34bb22de690a47798ad239b7de2724de
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spelling	oai:doaj.org-article:34bb22de690a47798ad239b7de2724de2021-11-11T17:58:42ZEnhancing the Mechanical Properties of Biodegradable Mg Alloys Processed by Warm HPT and Thermal Treatments10.3390/ma142163991996-1944https://doaj.org/article/34bb22de690a47798ad239b7de2724de2021-10-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/21/6399https://doaj.org/toc/1996-1944In this study, several biodegradable Mg alloys (Mg5Zn, Mg5Zn0.3Ca, Mg5Zn0.15Ca, and Mg5Zn0.15Ca0.15Zr, numbers in wt%) were investigated after thermomechanical processing via high-pressure torsion (HPT) at elevated temperature as well as after additional heat treatments. Indirect and direct analyses of microstructure revealed that the significant strength increases arise not only from dislocations and precipitates but also from vacancy agglomerates. By contrast with former low-temperature processing routes applied by the authors, a significant ductility was obtained because of temperature-induced dynamic recovery. The low initial values of Young’s modulus were not significantly affected by warm HPT-processing. nor by heat treatments afterwards. Also, corrosion resistance did not change or even increase during those treatments. Altogether, the study reveals a viable processing route for the optimization of Mg alloys to provide enhanced mechanical properties while leaving the corrosion properties unaffected, suggesting it for the use as biodegradable implant material.Andrea Mizelli-OjdanicJelena HorkyBernhard MinglerMattia FanettiSandra GardonioMatjaz ValantBartosz SulkowskiErhard SchaflerDmytro OrlovMichael J. ZehetbauerMDPI AGarticlesevere plastic deformation (SPD)precipitatesvacancy agglomeratesmagnesium alloysbiodegradabilityTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6399, p 6399 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	severe plastic deformation (SPD) precipitates vacancy agglomerates magnesium alloys biodegradability Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
spellingShingle	severe plastic deformation (SPD) precipitates vacancy agglomerates magnesium alloys biodegradability Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 Andrea Mizelli-Ojdanic Jelena Horky Bernhard Mingler Mattia Fanetti Sandra Gardonio Matjaz Valant Bartosz Sulkowski Erhard Schafler Dmytro Orlov Michael J. Zehetbauer Enhancing the Mechanical Properties of Biodegradable Mg Alloys Processed by Warm HPT and Thermal Treatments
description	In this study, several biodegradable Mg alloys (Mg5Zn, Mg5Zn0.3Ca, Mg5Zn0.15Ca, and Mg5Zn0.15Ca0.15Zr, numbers in wt%) were investigated after thermomechanical processing via high-pressure torsion (HPT) at elevated temperature as well as after additional heat treatments. Indirect and direct analyses of microstructure revealed that the significant strength increases arise not only from dislocations and precipitates but also from vacancy agglomerates. By contrast with former low-temperature processing routes applied by the authors, a significant ductility was obtained because of temperature-induced dynamic recovery. The low initial values of Young’s modulus were not significantly affected by warm HPT-processing. nor by heat treatments afterwards. Also, corrosion resistance did not change or even increase during those treatments. Altogether, the study reveals a viable processing route for the optimization of Mg alloys to provide enhanced mechanical properties while leaving the corrosion properties unaffected, suggesting it for the use as biodegradable implant material.
format	article
author	Andrea Mizelli-Ojdanic Jelena Horky Bernhard Mingler Mattia Fanetti Sandra Gardonio Matjaz Valant Bartosz Sulkowski Erhard Schafler Dmytro Orlov Michael J. Zehetbauer
author_facet	Andrea Mizelli-Ojdanic Jelena Horky Bernhard Mingler Mattia Fanetti Sandra Gardonio Matjaz Valant Bartosz Sulkowski Erhard Schafler Dmytro Orlov Michael J. Zehetbauer
author_sort	Andrea Mizelli-Ojdanic
title	Enhancing the Mechanical Properties of Biodegradable Mg Alloys Processed by Warm HPT and Thermal Treatments
title_short	Enhancing the Mechanical Properties of Biodegradable Mg Alloys Processed by Warm HPT and Thermal Treatments
title_full	Enhancing the Mechanical Properties of Biodegradable Mg Alloys Processed by Warm HPT and Thermal Treatments
title_fullStr	Enhancing the Mechanical Properties of Biodegradable Mg Alloys Processed by Warm HPT and Thermal Treatments
title_full_unstemmed	Enhancing the Mechanical Properties of Biodegradable Mg Alloys Processed by Warm HPT and Thermal Treatments
title_sort	enhancing the mechanical properties of biodegradable mg alloys processed by warm hpt and thermal treatments
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/34bb22de690a47798ad239b7de2724de
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Enhancing the Mechanical Properties of Biodegradable Mg Alloys Processed by Warm HPT and Thermal Treatments

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