High Performance Fine-Grained Biodegradable Mg-Zn-Ca Alloys Processed by Severe Plastic Deformation

The tensile strength, fatigue, and corrosion fatigue performance of the magnesium alloy ZX40 benefit strongly from hybrid deformation processing involving warm equal-channel angular pressing (ECAP) at the first step and room temperature rotary swaging at the second. The general corrosion resistance...

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Bibliographic Details
Published in:Metals (Basel ) 2019-02, Vol.9 (2), p.186
Main Authors: Vinogradov, Alexei, Vasilev, Evgeni, Kopylov, Vladimir, Linderov, Mikhail, Brilevesky, Alexander, Merson, Dmitry
Format: Article
Language:English
Subjects:
Biocompatibility
Biodegradability
Biodegradable materials
Corrosion fatigue
Corrosion resistance
Corrosion resistant alloys
Corrosion tests
Deformation effects
Equal channel angular pressing
fatigue
Fatigue limit
Magnesium alloys
Magnesium base alloys
Mechanical properties
Metal fatigue
microstructure
Plastic deformation
processing
Room temperature
Rotary swaging
Software
Swaging
Transplants & implants
Twinning
Ultimate tensile strength
Ultrafines
Uniform attack (corrosion)
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Summary:The tensile strength, fatigue, and corrosion fatigue performance of the magnesium alloy ZX40 benefit strongly from hybrid deformation processing involving warm equal-channel angular pressing (ECAP) at the first step and room temperature rotary swaging at the second. The general corrosion resistance improved as well, though to a lesser extent. The observed strengthening is associated with a combined effect of substantial microstructure refinement down to the nanoscale, reducing deformation twinning activity, dislocation accumulation, and texture transformation. The ultimate tensile strength and the endurance limit in the ultrafine-grained material reached or exceeded 380 and 120 MPa, respectively, which are remarkable values for this nominally low strength alloy.
ISSN:2075-4701
2075-4701
DOI:10.3390/met9020186