The role of melt cooling rate on the interface between 18R and Mg matrix in Mg97Zn1Y2 alloys
The role of melt cooling rate on the interface morphology and dislocation configuration between 18R long-period stacking ordered (LPSO) structure and Mg matrix in Mg97Zn1Y2 (at.%) alloys was investigated by atomic-scale HAADF-STEM imaging. The 18R/Mg interface is step-like both in the near-equilibri...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2023-08-01
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| Series: | Journal of Magnesium and Alloys |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2213956721002978 |
| _version_ | 1827266892573704192 |
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| author | Q.Q. Jin X.H. Shao J.M. Li Z.Z. Peng M. Lv B. Zhang Y.M. Li X.L. Ma |
| author_facet | Q.Q. Jin X.H. Shao J.M. Li Z.Z. Peng M. Lv B. Zhang Y.M. Li X.L. Ma |
| author_sort | Q.Q. Jin |
| collection | DOAJ |
| description | The role of melt cooling rate on the interface morphology and dislocation configuration between 18R long-period stacking ordered (LPSO) structure and Mg matrix in Mg97Zn1Y2 (at.%) alloys was investigated by atomic-scale HAADF-STEM imaging. The 18R/Mg interface is step-like both in the near-equilibrium alloy and non-equilibrium alloy. Lower cooling rate makes the step size more regular and larger. Only 54R structure can be observed at the interface in the near-equilibrium alloy, and the dislocations are highly ordered. 54R and 54R′ structure sandwiched by b1 and b2 + b3 dislocation arrays, and new dislocation configuration can be detected at the interface in the non-equilibrium alloy, but the dislocations are less ordered. 18R/Mg interface containing 54R or 54R′ in equilibrium width, parallel to the (011¯0) plane, should be most stable based on elastic calculation. The segregation of solute atoms and its strong interaction with dislocations dominate the LPSO/Mg interface via diffusion-displacive transformation. |
| first_indexed | 2024-03-11T18:29:00Z |
| format | Article |
| id | doaj.art-77cc66d075114e2a8bc472baf93b87e3 |
| institution | Directory Open Access Journal |
| issn | 2213-9567 |
| language | English |
| last_indexed | 2025-03-22T04:25:04Z |
| publishDate | 2023-08-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Journal of Magnesium and Alloys |
| spelling | doaj.art-77cc66d075114e2a8bc472baf93b87e32024-04-28T06:16:28ZengKeAi Communications Co., Ltd.Journal of Magnesium and Alloys2213-95672023-08-0111828832890The role of melt cooling rate on the interface between 18R and Mg matrix in Mg97Zn1Y2 alloysQ.Q. Jin0X.H. Shao1J.M. Li2Z.Z. Peng3M. Lv4B. Zhang5Y.M. Li6X.L. Ma7Materials Science and Engineering Research Center, Guangxi University of Science and Technology, Liuzhou 545006, China; Corresponding authors.Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China; Corresponding authors.Materials Science and Engineering Research Center, Guangxi University of Science and Technology, Liuzhou 545006, ChinaSchool of Materials Science and Engineering, Hebei University of Science and Technology, Shijiazhuang, Hebei 050018, ChinaShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaMaterials Science and Engineering Research Center, Guangxi University of Science and Technology, Liuzhou 545006, ChinaShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaThe role of melt cooling rate on the interface morphology and dislocation configuration between 18R long-period stacking ordered (LPSO) structure and Mg matrix in Mg97Zn1Y2 (at.%) alloys was investigated by atomic-scale HAADF-STEM imaging. The 18R/Mg interface is step-like both in the near-equilibrium alloy and non-equilibrium alloy. Lower cooling rate makes the step size more regular and larger. Only 54R structure can be observed at the interface in the near-equilibrium alloy, and the dislocations are highly ordered. 54R and 54R′ structure sandwiched by b1 and b2 + b3 dislocation arrays, and new dislocation configuration can be detected at the interface in the non-equilibrium alloy, but the dislocations are less ordered. 18R/Mg interface containing 54R or 54R′ in equilibrium width, parallel to the (011¯0) plane, should be most stable based on elastic calculation. The segregation of solute atoms and its strong interaction with dislocations dominate the LPSO/Mg interface via diffusion-displacive transformation.http://www.sciencedirect.com/science/article/pii/S2213956721002978Magnesium alloysLong-period stacking ordered phasesDislocationsInterface structure |
| spellingShingle | Q.Q. Jin X.H. Shao J.M. Li Z.Z. Peng M. Lv B. Zhang Y.M. Li X.L. Ma The role of melt cooling rate on the interface between 18R and Mg matrix in Mg97Zn1Y2 alloys Journal of Magnesium and Alloys Magnesium alloys Long-period stacking ordered phases Dislocations Interface structure |
| title | The role of melt cooling rate on the interface between 18R and Mg matrix in Mg97Zn1Y2 alloys |
| title_full | The role of melt cooling rate on the interface between 18R and Mg matrix in Mg97Zn1Y2 alloys |
| title_fullStr | The role of melt cooling rate on the interface between 18R and Mg matrix in Mg97Zn1Y2 alloys |
| title_full_unstemmed | The role of melt cooling rate on the interface between 18R and Mg matrix in Mg97Zn1Y2 alloys |
| title_short | The role of melt cooling rate on the interface between 18R and Mg matrix in Mg97Zn1Y2 alloys |
| title_sort | role of melt cooling rate on the interface between 18r and mg matrix in mg97zn1y2 alloys |
| topic | Magnesium alloys Long-period stacking ordered phases Dislocations Interface structure |
| url | http://www.sciencedirect.com/science/article/pii/S2213956721002978 |
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