Evolution of deformation twinning mechanisms in magnesium from low to high strain rates
We present a systematic investigation of {101¯2} extension twinning mechanism in single crystal magnesium micropillars deformed over seven orders of magnitude of strain rate, from 10–4 to 500 s−1, revealing how the accommodation of newly formed twins evolves with and depends on the kinetic compatibi...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-05-01
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| Series: | Materials & Design |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127522002672 |
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| author | Nicolò M. della Ventura Amit Sharma Szilvia Kalácska Manish Jain Thomas E.J. Edwards Cyril Cayron Roland Logé Johann Michler Xavier Maeder |
| author_facet | Nicolò M. della Ventura Amit Sharma Szilvia Kalácska Manish Jain Thomas E.J. Edwards Cyril Cayron Roland Logé Johann Michler Xavier Maeder |
| author_sort | Nicolò M. della Ventura |
| collection | DOAJ |
| description | We present a systematic investigation of {101¯2} extension twinning mechanism in single crystal magnesium micropillars deformed over seven orders of magnitude of strain rate, from 10–4 to 500 s−1, revealing how the accommodation of newly formed twins evolves with and depends on the kinetic compatibility of interfacial processes when high deformation rates are imposed. By combination of post-mortem 3D Electron Backscattered Diffraction, Transmission Kikuchi Diffraction and Transmission Electron Microscopy techniques, this work unveils the progressive evolution of the accommodating twin mechanisms from low to high strain rate, correlating differences in mechanical behavior with differences in twin crystallography. Away from quasi–static conditions, simple considerations of twinning shear do not suffice to describe unconventional twin morphologies, requiring the competition between newly activated dislocations and lattice distortions for allowing the evolution of the twin boundary along non–invariant twin planes. Under shock compressions, the basal/prismatic transformation establishing a lattice misorientation of 90° entirely governs the parent → twin conversion. The results illustrated here confirm that some of the recent interpretations deduced by particular twin morphologies are not universally valid and that deformation twinning is not only stress- but also strongly time–controlled. |
| first_indexed | 2024-04-12T17:22:00Z |
| format | Article |
| id | doaj.art-cf60fda3dd964309ac1edaaa25e16f6f |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-04-12T17:22:00Z |
| publishDate | 2022-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-cf60fda3dd964309ac1edaaa25e16f6f2022-12-22T03:23:27ZengElsevierMaterials & Design0264-12752022-05-01217110646Evolution of deformation twinning mechanisms in magnesium from low to high strain ratesNicolò M. della Ventura0Amit Sharma1Szilvia Kalácska2Manish Jain3Thomas E.J. Edwards4Cyril Cayron5Roland Logé6Johann Michler7Xavier Maeder8Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Mechanics of Materials and Nanostructures, Feuerwerkerstrasse 39, 3602, Thun, Switzerland; Corresponding author.Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Mechanics of Materials and Nanostructures, Feuerwerkerstrasse 39, 3602, Thun, SwitzerlandEmpa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Mechanics of Materials and Nanostructures, Feuerwerkerstrasse 39, 3602, Thun, SwitzerlandEmpa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Mechanics of Materials and Nanostructures, Feuerwerkerstrasse 39, 3602, Thun, SwitzerlandEmpa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Mechanics of Materials and Nanostructures, Feuerwerkerstrasse 39, 3602, Thun, SwitzerlandLaboratory of ThermoMechanical Metallurgy (LMTM), PX Group Chair, Ecole Polytechnique Fédérale de Lausanne (EPFL), Rue de la Maladière 71b, 2000 Neuchâtel, SwitzerlandLaboratory of ThermoMechanical Metallurgy (LMTM), PX Group Chair, Ecole Polytechnique Fédérale de Lausanne (EPFL), Rue de la Maladière 71b, 2000 Neuchâtel, SwitzerlandEmpa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Mechanics of Materials and Nanostructures, Feuerwerkerstrasse 39, 3602, Thun, SwitzerlandEmpa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Mechanics of Materials and Nanostructures, Feuerwerkerstrasse 39, 3602, Thun, SwitzerlandWe present a systematic investigation of {101¯2} extension twinning mechanism in single crystal magnesium micropillars deformed over seven orders of magnitude of strain rate, from 10–4 to 500 s−1, revealing how the accommodation of newly formed twins evolves with and depends on the kinetic compatibility of interfacial processes when high deformation rates are imposed. By combination of post-mortem 3D Electron Backscattered Diffraction, Transmission Kikuchi Diffraction and Transmission Electron Microscopy techniques, this work unveils the progressive evolution of the accommodating twin mechanisms from low to high strain rate, correlating differences in mechanical behavior with differences in twin crystallography. Away from quasi–static conditions, simple considerations of twinning shear do not suffice to describe unconventional twin morphologies, requiring the competition between newly activated dislocations and lattice distortions for allowing the evolution of the twin boundary along non–invariant twin planes. Under shock compressions, the basal/prismatic transformation establishing a lattice misorientation of 90° entirely governs the parent → twin conversion. The results illustrated here confirm that some of the recent interpretations deduced by particular twin morphologies are not universally valid and that deformation twinning is not only stress- but also strongly time–controlled.http://www.sciencedirect.com/science/article/pii/S0264127522002672MagnesiumDeformation twinningTwin interfaceHigh strain rateMicropillar compression |
| spellingShingle | Nicolò M. della Ventura Amit Sharma Szilvia Kalácska Manish Jain Thomas E.J. Edwards Cyril Cayron Roland Logé Johann Michler Xavier Maeder Evolution of deformation twinning mechanisms in magnesium from low to high strain rates Materials & Design Magnesium Deformation twinning Twin interface High strain rate Micropillar compression |
| title | Evolution of deformation twinning mechanisms in magnesium from low to high strain rates |
| title_full | Evolution of deformation twinning mechanisms in magnesium from low to high strain rates |
| title_fullStr | Evolution of deformation twinning mechanisms in magnesium from low to high strain rates |
| title_full_unstemmed | Evolution of deformation twinning mechanisms in magnesium from low to high strain rates |
| title_short | Evolution of deformation twinning mechanisms in magnesium from low to high strain rates |
| title_sort | evolution of deformation twinning mechanisms in magnesium from low to high strain rates |
| topic | Magnesium Deformation twinning Twin interface High strain rate Micropillar compression |
| url | http://www.sciencedirect.com/science/article/pii/S0264127522002672 |
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