The role of incoherent twin boundaries on the plasticity of Cu micropillars
The role of a ∑3{112} incoherent twin boundary (ITB) on the shear stress of Cu at the micron scale has been investigated through microcompression of bi-crystalline pillars containing ITB, as well as single-crystalline pillars, in two different compression directions. The Cu sample containing ITBs wa...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-08-01
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| Series: | Materials & Design |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127523005798 |
| _version_ | 1797736226908798976 |
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| author | Reza Hosseinabadi Andrea Brognara Christoph Kirchlechner James P. Best Gerhard Dehm |
| author_facet | Reza Hosseinabadi Andrea Brognara Christoph Kirchlechner James P. Best Gerhard Dehm |
| author_sort | Reza Hosseinabadi |
| collection | DOAJ |
| description | The role of a ∑3{112} incoherent twin boundary (ITB) on the shear stress of Cu at the micron scale has been investigated through microcompression of bi-crystalline pillars containing ITB, as well as single-crystalline pillars, in two different compression directions. The Cu sample containing ITBs was synthesized using magnetron sputtering on a sapphire substrate. Firstly, pillars along [111] compression direction were milled on the film surface. As multiple slip systems were activated upon loading, the dislocation-ITB interaction in this direction was dominated by the dislocation–dislocation interactions. Another set of pillars was milled from the side of the film (in the thickness of the film) in a nominally [134¯] compression direction. Compression in this direction activated a single slip in each grain, which facilitated the investigation of the interaction between dislocations and ITBs. Post-mortem images showed that slip traces were not distinctly connected at the boundary unlike ideal slip transmission in pillars containing a coherent twin boundary. Moreover, bi-crystalline pillars in the single slip direction are stronger than single-crystalline pillars. The observations indicate that ITBs are not impenetrable for dislocations, but the boundary demonstrates some resistance to transmission. |
| first_indexed | 2024-03-12T13:10:36Z |
| format | Article |
| id | doaj.art-c10d544e009e4b1c9b3dc3f8c923c45c |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-03-12T13:10:36Z |
| publishDate | 2023-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-c10d544e009e4b1c9b3dc3f8c923c45c2023-08-28T04:22:31ZengElsevierMaterials & Design0264-12752023-08-01232112164The role of incoherent twin boundaries on the plasticity of Cu micropillarsReza Hosseinabadi0Andrea Brognara1Christoph Kirchlechner2James P. Best3Gerhard Dehm4Max-Planck-Institut für Eisenforschung GmbH, GermanyMax-Planck-Institut für Eisenforschung GmbH, GermanyMax-Planck-Institut für Eisenforschung GmbH, Germany; Institute for Applied Materials, Karlsruhe Institute of Technology, GermanyMax-Planck-Institut für Eisenforschung GmbH, Germany; Corresponding authors.Max-Planck-Institut für Eisenforschung GmbH, Germany; Corresponding authors.The role of a ∑3{112} incoherent twin boundary (ITB) on the shear stress of Cu at the micron scale has been investigated through microcompression of bi-crystalline pillars containing ITB, as well as single-crystalline pillars, in two different compression directions. The Cu sample containing ITBs was synthesized using magnetron sputtering on a sapphire substrate. Firstly, pillars along [111] compression direction were milled on the film surface. As multiple slip systems were activated upon loading, the dislocation-ITB interaction in this direction was dominated by the dislocation–dislocation interactions. Another set of pillars was milled from the side of the film (in the thickness of the film) in a nominally [134¯] compression direction. Compression in this direction activated a single slip in each grain, which facilitated the investigation of the interaction between dislocations and ITBs. Post-mortem images showed that slip traces were not distinctly connected at the boundary unlike ideal slip transmission in pillars containing a coherent twin boundary. Moreover, bi-crystalline pillars in the single slip direction are stronger than single-crystalline pillars. The observations indicate that ITBs are not impenetrable for dislocations, but the boundary demonstrates some resistance to transmission.http://www.sciencedirect.com/science/article/pii/S0264127523005798DislocationIncoherent twin boundaryThin filmCompressionMicropillars |
| spellingShingle | Reza Hosseinabadi Andrea Brognara Christoph Kirchlechner James P. Best Gerhard Dehm The role of incoherent twin boundaries on the plasticity of Cu micropillars Materials & Design Dislocation Incoherent twin boundary Thin film Compression Micropillars |
| title | The role of incoherent twin boundaries on the plasticity of Cu micropillars |
| title_full | The role of incoherent twin boundaries on the plasticity of Cu micropillars |
| title_fullStr | The role of incoherent twin boundaries on the plasticity of Cu micropillars |
| title_full_unstemmed | The role of incoherent twin boundaries on the plasticity of Cu micropillars |
| title_short | The role of incoherent twin boundaries on the plasticity of Cu micropillars |
| title_sort | role of incoherent twin boundaries on the plasticity of cu micropillars |
| topic | Dislocation Incoherent twin boundary Thin film Compression Micropillars |
| url | http://www.sciencedirect.com/science/article/pii/S0264127523005798 |
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