Internal Stress and Dislocation Interaction of Plate-Shaped Misfitting Precipitates in Aluminum Alloys
The fine misfit precipitates in age-hardenable aluminum alloys have important roles due to their excellent age-hardening ability, by their interaction with dislocations. The present study focused on the internal stress field of plate-shaped misfitting precipitates to evaluate their roles in dislocat...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-10-01
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| Online Access: | https://www.mdpi.com/1996-1944/14/19/5811 |
| _version_ | 1797516079978774528 |
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| author | Shinji Muraishi |
| author_facet | Shinji Muraishi |
| author_sort | Shinji Muraishi |
| collection | DOAJ |
| description | The fine misfit precipitates in age-hardenable aluminum alloys have important roles due to their excellent age-hardening ability, by their interaction with dislocations. The present study focused on the internal stress field of plate-shaped misfitting precipitates to evaluate their roles in dislocation overcoming the precipitates by means of micromechanics based on Green’s function method. The stress field of misfit precipitates on {001} and {111} habit planes were reproduced by homogeneous misfit strain (eigenstrain) of the precipitate (Eshelby inclusion method), and the dislocation motion vector on the primary slip plane was predicted by the force acted on the dislocation by the Peach–Koehler formula. According to simulation results, the dislocation interaction strongly depends on the stress field and geometry of misfit precipitates; repulsive and attractive forces are operated on the dislocations lying on the primary slip plane when the dislocation approaches the misfit precipitates. The hardening ability of different orientations of precipitation variants was discussed in terms of interaction force acted on the dislocation. |
| first_indexed | 2024-03-10T06:56:17Z |
| format | Article |
| id | doaj.art-bb027c37317540e3b5e206f16a605842 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T06:56:17Z |
| publishDate | 2021-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-bb027c37317540e3b5e206f16a6058422023-11-22T16:27:31ZengMDPI AGMaterials1996-19442021-10-011419581110.3390/ma14195811Internal Stress and Dislocation Interaction of Plate-Shaped Misfitting Precipitates in Aluminum AlloysShinji Muraishi0Materials Science and Engineering, Tokyo Institute of Technology, Tokyo 152-8552, JapanThe fine misfit precipitates in age-hardenable aluminum alloys have important roles due to their excellent age-hardening ability, by their interaction with dislocations. The present study focused on the internal stress field of plate-shaped misfitting precipitates to evaluate their roles in dislocation overcoming the precipitates by means of micromechanics based on Green’s function method. The stress field of misfit precipitates on {001} and {111} habit planes were reproduced by homogeneous misfit strain (eigenstrain) of the precipitate (Eshelby inclusion method), and the dislocation motion vector on the primary slip plane was predicted by the force acted on the dislocation by the Peach–Koehler formula. According to simulation results, the dislocation interaction strongly depends on the stress field and geometry of misfit precipitates; repulsive and attractive forces are operated on the dislocations lying on the primary slip plane when the dislocation approaches the misfit precipitates. The hardening ability of different orientations of precipitation variants was discussed in terms of interaction force acted on the dislocation.https://www.mdpi.com/1996-1944/14/19/5811aluminum alloymicromechanicsdislocation dynamicsEshelby inclusion problem |
| spellingShingle | Shinji Muraishi Internal Stress and Dislocation Interaction of Plate-Shaped Misfitting Precipitates in Aluminum Alloys Materials aluminum alloy micromechanics dislocation dynamics Eshelby inclusion problem |
| title | Internal Stress and Dislocation Interaction of Plate-Shaped Misfitting Precipitates in Aluminum Alloys |
| title_full | Internal Stress and Dislocation Interaction of Plate-Shaped Misfitting Precipitates in Aluminum Alloys |
| title_fullStr | Internal Stress and Dislocation Interaction of Plate-Shaped Misfitting Precipitates in Aluminum Alloys |
| title_full_unstemmed | Internal Stress and Dislocation Interaction of Plate-Shaped Misfitting Precipitates in Aluminum Alloys |
| title_short | Internal Stress and Dislocation Interaction of Plate-Shaped Misfitting Precipitates in Aluminum Alloys |
| title_sort | internal stress and dislocation interaction of plate shaped misfitting precipitates in aluminum alloys |
| topic | aluminum alloy micromechanics dislocation dynamics Eshelby inclusion problem |
| url | https://www.mdpi.com/1996-1944/14/19/5811 |
| work_keys_str_mv | AT shinjimuraishi internalstressanddislocationinteractionofplateshapedmisfittingprecipitatesinaluminumalloys |