Evolution of microstructure, texture and residual stress of AZ31 Mg alloy in hot extrusion process
In this work, we have investigated the microstructure, texture, and residual stress of AZ31 Mg alloy at several higher extrusion temperatures (360 °C, 380 °C, 400 °C) and speeds (1 m min ^−1 , 2 m min ^−1 , 3 m min ^−1 ). Results show that the bimodal microstructure can be observed in all extruded M...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2021-01-01
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| Series: | Materials Research Express |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/2053-1591/ac0736 |
| _version_ | 1797746914322546688 |
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| author | Lei Kang Weirong Liu Xiongbo Zhang Leng Chen |
| author_facet | Lei Kang Weirong Liu Xiongbo Zhang Leng Chen |
| author_sort | Lei Kang |
| collection | DOAJ |
| description | In this work, we have investigated the microstructure, texture, and residual stress of AZ31 Mg alloy at several higher extrusion temperatures (360 °C, 380 °C, 400 °C) and speeds (1 m min ^−1 , 2 m min ^−1 , 3 m min ^−1 ). Results show that the bimodal microstructure can be observed in all extruded Mg alloys, consisting of the fine grains in dynamic recrystallization (DRX) zone and the coarse grains in non-dynamic recrystallization (non-DRX) zone. The non-monotonic relation between average grain diameter and extrusion speed has been found. It is attributed to the promoted nucleation and inhibited grain growth at higher extrusion speed. The bimodal microstructure can maintain the stability of sharp {0002} basal texture. Schmid Factor (SF) is calculated to explain the mechanism of basal texture formation. By employing XRD with cos α method, the residual stress has been measured. The major origin of residual stress release at higher extrusion temperature is the grain growth, rather than the strengthening of basal texture. The anisotropy of residual stress distribution is related to the coupling effect of grain growth and evolution of basal texture of extruded Mg alloys. |
| first_indexed | 2024-03-12T15:44:35Z |
| format | Article |
| id | doaj.art-f18e0d930f2045998834cf338ed8faf6 |
| institution | Directory Open Access Journal |
| issn | 2053-1591 |
| language | English |
| last_indexed | 2024-03-12T15:44:35Z |
| publishDate | 2021-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Materials Research Express |
| spelling | doaj.art-f18e0d930f2045998834cf338ed8faf62023-08-09T15:50:37ZengIOP PublishingMaterials Research Express2053-15912021-01-018606651910.1088/2053-1591/ac0736Evolution of microstructure, texture and residual stress of AZ31 Mg alloy in hot extrusion processLei Kang0https://orcid.org/0000-0003-2946-8283Weirong Liu1Xiongbo Zhang2Leng Chen3https://orcid.org/0000-0002-0378-9487School of Materials Science and Engineering, University of Science and Technology Beijing , Beijing 100083, People’s Republic of ChinaSchool of Materials Science and Engineering, University of Science and Technology Beijing , Beijing 100083, People’s Republic of ChinaSchool of Materials Science and Engineering, University of Science and Technology Beijing , Beijing 100083, People’s Republic of ChinaSchool of Materials Science and Engineering, University of Science and Technology Beijing , Beijing 100083, People’s Republic of ChinaIn this work, we have investigated the microstructure, texture, and residual stress of AZ31 Mg alloy at several higher extrusion temperatures (360 °C, 380 °C, 400 °C) and speeds (1 m min ^−1 , 2 m min ^−1 , 3 m min ^−1 ). Results show that the bimodal microstructure can be observed in all extruded Mg alloys, consisting of the fine grains in dynamic recrystallization (DRX) zone and the coarse grains in non-dynamic recrystallization (non-DRX) zone. The non-monotonic relation between average grain diameter and extrusion speed has been found. It is attributed to the promoted nucleation and inhibited grain growth at higher extrusion speed. The bimodal microstructure can maintain the stability of sharp {0002} basal texture. Schmid Factor (SF) is calculated to explain the mechanism of basal texture formation. By employing XRD with cos α method, the residual stress has been measured. The major origin of residual stress release at higher extrusion temperature is the grain growth, rather than the strengthening of basal texture. The anisotropy of residual stress distribution is related to the coupling effect of grain growth and evolution of basal texture of extruded Mg alloys.https://doi.org/10.1088/2053-1591/ac0736Mg alloysextrusionmicrostructuretextureresidual stressX-ray diffraction |
| spellingShingle | Lei Kang Weirong Liu Xiongbo Zhang Leng Chen Evolution of microstructure, texture and residual stress of AZ31 Mg alloy in hot extrusion process Materials Research Express Mg alloys extrusion microstructure texture residual stress X-ray diffraction |
| title | Evolution of microstructure, texture and residual stress of AZ31 Mg alloy in hot extrusion process |
| title_full | Evolution of microstructure, texture and residual stress of AZ31 Mg alloy in hot extrusion process |
| title_fullStr | Evolution of microstructure, texture and residual stress of AZ31 Mg alloy in hot extrusion process |
| title_full_unstemmed | Evolution of microstructure, texture and residual stress of AZ31 Mg alloy in hot extrusion process |
| title_short | Evolution of microstructure, texture and residual stress of AZ31 Mg alloy in hot extrusion process |
| title_sort | evolution of microstructure texture and residual stress of az31 mg alloy in hot extrusion process |
| topic | Mg alloys extrusion microstructure texture residual stress X-ray diffraction |
| url | https://doi.org/10.1088/2053-1591/ac0736 |
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