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Ultrafeinkörnige durch Heißextrusion und Mehrfachzug hergestellte Zn‐0,45Li‐Legierung mit verbesserten mechanischen Eigenschaften, Abbauverhalten und Zytokompatibilität
Author(s) -
Deng L.,
Guo P.,
Li F.,
Yang L.,
Zhu X.,
Xu C.,
Zhang Q.,
Shi Y.,
Song Z.,
Sun W.,
Liu H.
Publication year - 2021
Publication title -
materialwissenschaft und werkstofftechnik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.285
H-Index - 38
eISSN - 1521-4052
pISSN - 0933-5137
DOI - 10.1002/mawe.202100060
Subject(s) - extrusion , ultimate tensile strength , materials science , elongation , alloy , ductility (earth science) , microstructure , metallurgy , grain size , grain boundary , degradation (telecommunications) , creep , telecommunications , computer science
Biodegradable Zn‐0.45Li alloys with high strength and ductility were successfully fabricated by hot extrusion and multi‐pass drawing to obtain ultrafine‐grained microstructures with a secondary phase of fine LiZn 4 participates. The mechanical properties, degradation behavior and cytocompatibility of the alloys were subsequently investigated. Results showed that grain refinement could be achieved in the alloys after hot extrusion and multi‐pass drawing. The yield strength, ultimate tensile strength, and elongation to failure of the ultrafine‐grained Zn‐0.45Li alloys reached 416 MPa, 567 MPa and 55.4 %, respectively. Enhancements in both strength and elongation could be attributed to interactions between LiZn 4 and matrix dislocations, the pinning effect of LiZn 4 on grain boundaries, and grain refinement. Immersion tests and MTT cytotoxicity assay indicated that the Zn‐0.45Li alloys have a corrosion rate and cytocompatibility similar to the values reported for biomedical implants.