PSI - Issue 23

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Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2019) 000 – 000 Structural Integrity Procedia 00 (2019) 000 – 000

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Procedia Structural Integrity 23 (2019) 3–8

© 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the ICMSMF organizers © 201 9 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the IC MSMF organizers. Zinc- ased materials alloyed with the e ments of the 2 nd gro p of th eriodic table have been studied as potential materials for the fabrication of various biodeg adable implants. In this tudy, we prepared two ternary alloys: ZnMg0.8Ca0.2 (wt.%) a d ZnMg0.8Sr0.2 by elting a mixture of pur elements and subsequent gravity casting. We studied the influence of the third element (Ca or Sr) on the microstructural and mechanical char cteristic of the alloys i the as-cast states and after vari us times annealing at 50 °C. he microstructure f both ternary alloys was similar, the main difference was in the size and morphology of Ca/SrZn 13 phase. Th SrZn 13 phase formed fin partic es with a submicr n size and had more signifi ant hardening effect in the as-cast st t compared to the CaZ 13 phase. The annealing led to a transformation of the eutectic structure into the “ma siv ” Mg 2 Zn 11 phase which caused a significant incre se of both hardne s and compressive yield stress. I the annealed states, comparable hardness was observed for both alloys and higher compressive yield strength for the Ca-containing alloy. © 201 9 The Authors. Published by Elsevier B.V. This is an ope acces article under CC BY-NC-ND lic nse (http://creativecommon org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the IC MSMF organizers. 9th International Conference on Materials Structure and Micromechanics of Fracture ZnMg0.8Ca/Sr0.2 ternary alloys – the influence of the third element on material properties Jaroslav Čapek a *, Jan Pinc a,b Jiří Kubásek b , Orsolya Molnárová a , Jan Ma ňák a , Jan Drahokoupil a a FZU-Institute of Physics of the Czech Academy of Sciences, Na Slovance 1999/2, Prague 18221, The Czech Republic b Department of Metals and Corrosion Engineering, Universit y of Chemistry and Technology, Prague, Technická 5, Prague 16628, The Czech Republic 9th International Conference on Materials Structure and Micromechanics of Fracture ZnMg0.8Ca/Sr0.2 ternary alloys – the influence of the third element on material properties Jaroslav Čapek a *, Jan Pinc a,b Jiří Kubásek b , Orsolya Molnárová a , Jan Ma ňák a , Jan Drahokoupil a a FZU-Institute of Phy cs of the Czech Academy of Sciences, Na Slovan e 1999/2, r 18221, The Czech R public b Department of Metals and Corrosion Engineering, Universit y of Chemistry and Technology, Prague, Technická 5, Prague 16628, The Czech Republic Abstract Abstract Zinc-based materials alloyed with the elements of the 2 nd group of the periodic table have been studied as potential materials for the fabrication of various biodegradable implants. In this study, we prepared two ternary alloys: ZnMg0.8Ca0.2 (wt.%) and ZnMg0.8Sr0.2 by melting a mixture of pure elements and subsequent gravity casting. We studied the influence of the third element (Ca or Sr) on the microstructural and mechanical characteristics of the alloys in the as-cast states and after various times of annealing at 350 °C. The microstructure of both ternary alloys was similar, the main difference was in the size and morphology of the Ca/SrZn 13 phase. The SrZn 13 phase formed fine particles with a submicron size and had more significant hardening effect in the as-cast state compared to the CaZn 13 phase. The annealing led to a transformation of the eutectic structure into the “massive” Mg 2 Zn 11 phase which caused a significant increase of both hardness and compressive yield stress. In the annealed states, comparable hardness was observed for both alloys and higher compressive yield strength for the Ca-containing alloy.

Keywords: Biodegradable zinc alloys; microstructure; mechanical properties Keywords: Biodegradable zinc alloys; microstructure; mechanical properties

* Corresponding author. Tel.: +420 266 052 604; fax: +420 286 890 527. E-mail address: capekj@fzu.cz * Correspon ing author. Tel.: +420 266 052 604; fax: +420 286 890 527. E-mail address: capekj@fzu.cz

2452-3216 © 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the IC MSMF organizers. 2452-3216 © 2019 The Authors. Published by Elsevier B.V. This is an ope acces article under CC BY-NC-ND lic nse (http://creativecommon org/licenses/by-nc-nd/4.0/)

Peer-review under responsibility of the scientific committee of the IC MSMF organizers.

2452-3216 © 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the ICMSMF organizers 10.1016/j.prostr.2020.01.054