Deformation twins and annealing twins in high purity coarse-grained aluminum by equal channel angular pressing at high strain rate
An as-cast high purity coarse-grained aluminum was deformed by dynamic equal channel angular pressing (D-ECAP) at high strain rate for one pass at room temperature.The twins formed during extrusion were studied with electron backscatter diffraction.The results show that deformation twins and anneali...
| Main Authors: | , , |
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| Format: | Article |
| Language: | zho |
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Journal of Materials Engineering
2021-04-01
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| Series: | Cailiao gongcheng |
| Subjects: | |
| Online Access: | http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2020.000288 |
| _version_ | 1797968970143236096 |
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| author | LIU Jing-yong LU Lei ZHONG Zheng-ye |
| author_facet | LIU Jing-yong LU Lei ZHONG Zheng-ye |
| author_sort | LIU Jing-yong |
| collection | DOAJ |
| description | An as-cast high purity coarse-grained aluminum was deformed by dynamic equal channel angular pressing (D-ECAP) at high strain rate for one pass at room temperature.The twins formed during extrusion were studied with electron backscatter diffraction.The results show that deformation twins and annealing twins can be synthesized simultaneously in the coarse-grained aluminum <i>via</i> D-ECAP, which can be differentiated by their morphology,Kernel average misorientation (KAM) and the misorientation between adjacent grains.Due to the high strain rate and large shear deformation of D-ECAP,deformation twins with size of several hundred microns can be formed in aluminum with high stacking fault energy,and their shapes are lenticular.The twin boundaries deviate from <i>∑</i>3 60°〈111〉 orientation relationship as a result of subsequent deformation,and the KAM values are mainly between 0.6°-1.8°.The high strain rate shear deformation contributes to the formation of abundant stacking fault,intricate dislocation patterns,and high deformation stored energy,and thus the ensuing temperature rise facilitates the formation of annealing twins.The morphology of annealing twins is irregular,but the orientation relationship of annealing twin boundaries is more close to <i>∑</i>3 60°〈111〉 and the KAM values of annealing twins are mainly between 0.2°-0.5°. |
| first_indexed | 2024-04-11T02:54:51Z |
| format | Article |
| id | doaj.art-185e1647995d4195836d210d52450991 |
| institution | Directory Open Access Journal |
| issn | 1001-4381 1001-4381 |
| language | zho |
| last_indexed | 2024-04-11T02:54:51Z |
| publishDate | 2021-04-01 |
| publisher | Journal of Materials Engineering |
| record_format | Article |
| series | Cailiao gongcheng |
| spelling | doaj.art-185e1647995d4195836d210d524509912023-01-02T15:19:56ZzhoJournal of Materials EngineeringCailiao gongcheng1001-43811001-43812021-04-01494899410.11868/j.issn.1001-4381.2020.00028820210409Deformation twins and annealing twins in high purity coarse-grained aluminum by equal channel angular pressing at high strain rateLIU Jing-yong0LU Lei1ZHONG Zheng-ye2Key Laboratory of Advanced Technologies of Materials(Ministry of Education), Southwest Jiaotong University, Chengdu 610031, ChinaKey Laboratory of Advanced Technologies of Materials(Ministry of Education), Southwest Jiaotong University, Chengdu 610031, ChinaKey Laboratory of Advanced Technologies of Materials(Ministry of Education), Southwest Jiaotong University, Chengdu 610031, ChinaAn as-cast high purity coarse-grained aluminum was deformed by dynamic equal channel angular pressing (D-ECAP) at high strain rate for one pass at room temperature.The twins formed during extrusion were studied with electron backscatter diffraction.The results show that deformation twins and annealing twins can be synthesized simultaneously in the coarse-grained aluminum <i>via</i> D-ECAP, which can be differentiated by their morphology,Kernel average misorientation (KAM) and the misorientation between adjacent grains.Due to the high strain rate and large shear deformation of D-ECAP,deformation twins with size of several hundred microns can be formed in aluminum with high stacking fault energy,and their shapes are lenticular.The twin boundaries deviate from <i>∑</i>3 60°〈111〉 orientation relationship as a result of subsequent deformation,and the KAM values are mainly between 0.6°-1.8°.The high strain rate shear deformation contributes to the formation of abundant stacking fault,intricate dislocation patterns,and high deformation stored energy,and thus the ensuing temperature rise facilitates the formation of annealing twins.The morphology of annealing twins is irregular,but the orientation relationship of annealing twin boundaries is more close to <i>∑</i>3 60°〈111〉 and the KAM values of annealing twins are mainly between 0.2°-0.5°.http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2020.000288high purity coarse-grained aluminumhigh strain rateequal channel angular pressingdeformation twinannealing twin |
| spellingShingle | LIU Jing-yong LU Lei ZHONG Zheng-ye Deformation twins and annealing twins in high purity coarse-grained aluminum by equal channel angular pressing at high strain rate Cailiao gongcheng high purity coarse-grained aluminum high strain rate equal channel angular pressing deformation twin annealing twin |
| title | Deformation twins and annealing twins in high purity coarse-grained aluminum by equal channel angular pressing at high strain rate |
| title_full | Deformation twins and annealing twins in high purity coarse-grained aluminum by equal channel angular pressing at high strain rate |
| title_fullStr | Deformation twins and annealing twins in high purity coarse-grained aluminum by equal channel angular pressing at high strain rate |
| title_full_unstemmed | Deformation twins and annealing twins in high purity coarse-grained aluminum by equal channel angular pressing at high strain rate |
| title_short | Deformation twins and annealing twins in high purity coarse-grained aluminum by equal channel angular pressing at high strain rate |
| title_sort | deformation twins and annealing twins in high purity coarse grained aluminum by equal channel angular pressing at high strain rate |
| topic | high purity coarse-grained aluminum high strain rate equal channel angular pressing deformation twin annealing twin |
| url | http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2020.000288 |
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