Understanding the interaction of {10–12} twins and Mg17Al12 precipitates in magnesium alloys via high-resolution electron microscopy
The interactions between {10 1‾ 2} twins and basal precipitates in the Mg–8Al-0.5Zn alloys have been investigated using high-resolution transmission electron microscopy. The underlying interaction mechanisms at different twinning processes were analyzed in detail. In the process of twin propagation,...
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Elsevier
2023-11-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423029502 |
| _version_ | 1797301444439703552 |
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| author | Feiya Liu Hongzhi Cui Chaoqiang Liu Xiaojie Song Zhongyu Cui Renlong Xin |
| author_facet | Feiya Liu Hongzhi Cui Chaoqiang Liu Xiaojie Song Zhongyu Cui Renlong Xin |
| author_sort | Feiya Liu |
| collection | DOAJ |
| description | The interactions between {10 1‾ 2} twins and basal precipitates in the Mg–8Al-0.5Zn alloys have been investigated using high-resolution transmission electron microscopy. The underlying interaction mechanisms at different twinning processes were analyzed in detail. In the process of twin propagation, the twin tip can traverse across multiple basal precipitates in the form of nucleation of new twins on the opposite side of the precipitates and continuously expand in the grain. Such re-nucleation events are suggested to be driven by the local stress concentration arising from the twin impinging upon the precipitate. During twin thickening, the precipitates undergo a small elastic deflection rather than plastic shearing when the twin engulf them. Furthermore, a large number of I1 stacking faults are activated at the twin-precipitate interface to accommodate the twinning shear. The orientation relationship (OR) of the precipitates inside the twin is changed from Burgers to [2 1‾1‾ 0]α//[11 1‾]β, (0 1‾ 10)α//(011)β, (0001)α//(2‾ 11‾)β when they are engulfed by twin. |
| first_indexed | 2024-03-07T23:21:40Z |
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| id | doaj.art-3d4513ac5cbc4329a4b4da4462943f5a |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-07T23:21:40Z |
| publishDate | 2023-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-3d4513ac5cbc4329a4b4da4462943f5a2024-02-21T05:28:16ZengElsevierJournal of Materials Research and Technology2238-78542023-11-012771297137Understanding the interaction of {10–12} twins and Mg17Al12 precipitates in magnesium alloys via high-resolution electron microscopyFeiya Liu0Hongzhi Cui1Chaoqiang Liu2Xiaojie Song3Zhongyu Cui4Renlong Xin5College of Materials Science and Engineering, Ocean University of China, Qingdao, ChinaCollege of Materials Science and Engineering, Ocean University of China, Qingdao, China; Corresponding author. San Sha Road 1299, Huang Dao District, Qingdao, 266404, China.State Key Laboratory of Powder Metallurgy, Central South University, Changsha, ChinaSchool of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao, ChinaCollege of Materials Science and Engineering, Ocean University of China, Qingdao, ChinaJoint International Laboratory for Light Alloys (MOE), College of Materials Science and Engineering, Chongqing University, Chongqing, ChinaThe interactions between {10 1‾ 2} twins and basal precipitates in the Mg–8Al-0.5Zn alloys have been investigated using high-resolution transmission electron microscopy. The underlying interaction mechanisms at different twinning processes were analyzed in detail. In the process of twin propagation, the twin tip can traverse across multiple basal precipitates in the form of nucleation of new twins on the opposite side of the precipitates and continuously expand in the grain. Such re-nucleation events are suggested to be driven by the local stress concentration arising from the twin impinging upon the precipitate. During twin thickening, the precipitates undergo a small elastic deflection rather than plastic shearing when the twin engulf them. Furthermore, a large number of I1 stacking faults are activated at the twin-precipitate interface to accommodate the twinning shear. The orientation relationship (OR) of the precipitates inside the twin is changed from Burgers to [2 1‾1‾ 0]α//[11 1‾]β, (0 1‾ 10)α//(011)β, (0001)α//(2‾ 11‾)β when they are engulfed by twin.http://www.sciencedirect.com/science/article/pii/S2238785423029502TwinPrecipitateMagnesium alloyMicrostructureTransmission electron microscopy |
| spellingShingle | Feiya Liu Hongzhi Cui Chaoqiang Liu Xiaojie Song Zhongyu Cui Renlong Xin Understanding the interaction of {10–12} twins and Mg17Al12 precipitates in magnesium alloys via high-resolution electron microscopy Journal of Materials Research and Technology Twin Precipitate Magnesium alloy Microstructure Transmission electron microscopy |
| title | Understanding the interaction of {10–12} twins and Mg17Al12 precipitates in magnesium alloys via high-resolution electron microscopy |
| title_full | Understanding the interaction of {10–12} twins and Mg17Al12 precipitates in magnesium alloys via high-resolution electron microscopy |
| title_fullStr | Understanding the interaction of {10–12} twins and Mg17Al12 precipitates in magnesium alloys via high-resolution electron microscopy |
| title_full_unstemmed | Understanding the interaction of {10–12} twins and Mg17Al12 precipitates in magnesium alloys via high-resolution electron microscopy |
| title_short | Understanding the interaction of {10–12} twins and Mg17Al12 precipitates in magnesium alloys via high-resolution electron microscopy |
| title_sort | understanding the interaction of 10 12 twins and mg17al12 precipitates in magnesium alloys via high resolution electron microscopy |
| topic | Twin Precipitate Magnesium alloy Microstructure Transmission electron microscopy |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423029502 |
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