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Mech, Krzysztof
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Publications (6/6 displayed)
- 2023Determination of critical resolved shear stresses associated with <a> slips in pure Zn and Zn-Ag alloys via micro-pillar compressioncitations
- 2023Determination of critical resolved shear stresses associated with slips in pure Zn and Zn-Ag alloys via micro-pillar compressioncitations
- 2022Long-term in vitro corrosion behavior of Zn-3Ag and Zn-3Ag-0.5Mg alloys considered for biodegradable implant applicationscitations
- 2019Design of novel Zn-Ag-Zr alloy with enhanced strength as a potential biodegradable implant materialcitations
- 2019MHD Supported Electroreduction of Formate Nickel Complexes with Simultaneous Incorporation of TiO2 Particlescitations
- 2017Charge transfer tuning in TiO2 hybrid nanostructures with acceptor–acceptor systemscitations
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article
Determination of critical resolved shear stresses associated with <a> slips in pure Zn and Zn-Ag alloys via micro-pillar compression
Abstract
The room-temperature plastic deformation behavior of pure Zn and Zn-Ag (0–2.2 at.%) biodegradablealloys has been investigated via uniaxial in situ micro-pillar compression tests performed within a scanningelectron microscope. The critical resolved shear stresses (CRSS) were quantified as a function ofmicro-pillar diameter. The compression of single crystal micro-pillars was performed at various strainrates in carefully selected grains, the crystallographic orientation of which facilitates deformation eithervia basal 0001 f gh1120i or prismatic 1010n oh1120i slip. The CRSS values increased with decreasedmicro-pillar diameter, revealing a more pronounced size effect in pure Zn deformed via basal slip. Theobserved solid solution strengthening effect in Zn-Ag alloys with increasing Ag content was associatedwith a CRSS increase from 26.6 MPa to 37.0 MPa (by40 %) in the basal slip system and from99.1 MPa to 188.4 MPa (by104 %) in the prismatic slip system. The extraordinarily high CRSS valuesfor basal slip activated in pure Zn and Zn-0.14Ag alloy compared to the solid solution strengthening modelwas attributed to the critically low dislocation density. In the Zn-Ag alloy with Ag content > 0.5 at.% higherdislocation densities are expected, which result in a more predictable plastic deformation behavior.