Enhancing the Mechanical Properties of Biodegradable Mg Alloys Processed by Warm HPT and Thermal Treatments
Mizelli-Ojdanic, Andrea ; Horky, Jelena ; Mingler, Bernhard ; Fanetti, Mattia ; Gardonio, Sandra ; Valant, Matjaz ; Sulkowski, Bartosz ; Schafler, Erhard ; Orlov, Dmytro LU
and Zehetbauer, Michael J.
(2021)
In Materials
14(21).
- Abstract
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... (More)
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.
(Less)
- author
- Mizelli-Ojdanic, Andrea
; Horky, Jelena
; Mingler, Bernhard
; Fanetti, Mattia
; Gardonio, Sandra
; Valant, Matjaz
; Sulkowski, Bartosz
; Schafler, Erhard
; Orlov, Dmytro
LU
and Zehetbauer, Michael J.
- organization
- publishing date
- 2021-10-25
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Biodegradability, Magnesium alloys, Precipitates, Severe plastic deformation (SPD), Vacancy agglomerates
- in
- Materials
- volume
- 14
- issue
- 21
- article number
- 6399
- publisher
- MDPI AG
- external identifiers
-
- scopus:85118185422
- pmid:34771925
- ISSN
- 1996-1944
- DOI
- 10.3390/ma14216399
- project
- Topologically designed magnesium alloys for biomedical applications
- language
- English
- LU publication?
- yes
- id
- e3a8da71-f986-4b76-a71e-5aceaafd1d62
- date added to LUP
- 2021-11-13 16:18:55
- date last changed
- 2024-06-15 20:20:50
@article{e3a8da71-f986-4b76-a71e-5aceaafd1d62,
abstract = {{<p>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.</p>}},
author = {{Mizelli-Ojdanic, Andrea and Horky, Jelena and Mingler, Bernhard and Fanetti, Mattia and Gardonio, Sandra and Valant, Matjaz and Sulkowski, Bartosz and Schafler, Erhard and Orlov, Dmytro and Zehetbauer, Michael J.}},
issn = {{1996-1944}},
keywords = {{Biodegradability; Magnesium alloys; Precipitates; Severe plastic deformation (SPD); Vacancy agglomerates}},
language = {{eng}},
month = {{10}},
number = {{21}},
publisher = {{MDPI AG}},
series = {{Materials}},
title = {{Enhancing the Mechanical Properties of Biodegradable Mg Alloys Processed by Warm HPT and Thermal Treatments}},
url = {{http://dx.doi.org/10.3390/ma14216399}},
doi = {{10.3390/ma14216399}},
volume = {{14}},
year = {{2021}},
}