Unveiling precipitation behavior in Mg-Y based alloys
Mg-Y based alloys exhibit a promising combination of strength and deformability through tuning precipitation and solute strengthening mechanisms and tailoring the activity of non-basal dislocations. Understanding the precipitation sequence of Mg-Y based alloys and its dependence on Yttrium concentra...
| Main Authors: | , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2021-04-01
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| Series: | Materials & Design |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127521001234 |
| _version_ | 1818623004000649216 |
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| author | Qingchun Zhu Yangxin Li Zhigang Ding Jian Wang Yuxuan Liu Huan Zhang Tian Xie Mingxu Wang Hong Zhu Tao Ying Wei Liu Xiaoqin Zeng |
| author_facet | Qingchun Zhu Yangxin Li Zhigang Ding Jian Wang Yuxuan Liu Huan Zhang Tian Xie Mingxu Wang Hong Zhu Tao Ying Wei Liu Xiaoqin Zeng |
| author_sort | Qingchun Zhu |
| collection | DOAJ |
| description | Mg-Y based alloys exhibit a promising combination of strength and deformability through tuning precipitation and solute strengthening mechanisms and tailoring the activity of non-basal dislocations. Understanding the precipitation sequence of Mg-Y based alloys and its dependence on Yttrium concentration in the matrix will provide a guideline for fine tuning structure, morphology and distribution of precipitates in Mg-Y based alloys. In this paper, we explore the precipitation behaviors of Mg-11Y (wt%) and Mg-11Y-1Al (wt%) alloys using aberration-corrected scanning transmission electron microscopy, and rationalize the experimental observations based on first-principles density functional theory calculations. The precipitation sequence during ageing at 225 °C is identified to be SSSS → clusters/G.P. Zones →β′ (Mg7Y) → β′′/βt′′ (Mg3Y). A novel βt′′ phase forms through in-situ transformation from the β′ phase, which shares the same Mg3Y composition with D019-β′′ phase and exhibits the same cbco-structure as β′ phase in Mg-Y based alloys. |
| first_indexed | 2024-12-16T18:34:10Z |
| format | Article |
| id | doaj.art-777a0f42c69c42daab879274bb55ffff |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-12-16T18:34:10Z |
| publishDate | 2021-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-777a0f42c69c42daab879274bb55ffff2022-12-21T22:21:12ZengElsevierMaterials & Design0264-12752021-04-01202109570Unveiling precipitation behavior in Mg-Y based alloysQingchun Zhu0Yangxin Li1Zhigang Ding2Jian Wang3Yuxuan Liu4Huan Zhang5Tian Xie6Mingxu Wang7Hong Zhu8Tao Ying9Wei Liu10Xiaoqin Zeng11National Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composite, Shanghai Jiao Tong University, 200240 Shanghai, PR ChinaNational Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composite, Shanghai Jiao Tong University, 200240 Shanghai, PR China; Corresponding authors.Nano and Heterogeneous Materials Center, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR ChinaMechanical and Materials Engineering, University of Nebraska-Lincoln, Lincoln, NE 68588, USANational Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composite, Shanghai Jiao Tong University, 200240 Shanghai, PR ChinaNational Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composite, Shanghai Jiao Tong University, 200240 Shanghai, PR ChinaNational Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composite, Shanghai Jiao Tong University, 200240 Shanghai, PR ChinaNational Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composite, Shanghai Jiao Tong University, 200240 Shanghai, PR ChinaUniversity of Michigan-Shanghai Jiao Tong University Joint Institute, Shanghai Jiao Tong University, 200240 Shanghai, PR ChinaNational Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composite, Shanghai Jiao Tong University, 200240 Shanghai, PR ChinaNano and Heterogeneous Materials Center, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR ChinaNational Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composite, Shanghai Jiao Tong University, 200240 Shanghai, PR China; Corresponding authors.Mg-Y based alloys exhibit a promising combination of strength and deformability through tuning precipitation and solute strengthening mechanisms and tailoring the activity of non-basal dislocations. Understanding the precipitation sequence of Mg-Y based alloys and its dependence on Yttrium concentration in the matrix will provide a guideline for fine tuning structure, morphology and distribution of precipitates in Mg-Y based alloys. In this paper, we explore the precipitation behaviors of Mg-11Y (wt%) and Mg-11Y-1Al (wt%) alloys using aberration-corrected scanning transmission electron microscopy, and rationalize the experimental observations based on first-principles density functional theory calculations. The precipitation sequence during ageing at 225 °C is identified to be SSSS → clusters/G.P. Zones →β′ (Mg7Y) → β′′/βt′′ (Mg3Y). A novel βt′′ phase forms through in-situ transformation from the β′ phase, which shares the same Mg3Y composition with D019-β′′ phase and exhibits the same cbco-structure as β′ phase in Mg-Y based alloys.http://www.sciencedirect.com/science/article/pii/S0264127521001234Mg alloysPrecipitation behaviorPhase transformationHAADF-STEMDensity functional theory |
| spellingShingle | Qingchun Zhu Yangxin Li Zhigang Ding Jian Wang Yuxuan Liu Huan Zhang Tian Xie Mingxu Wang Hong Zhu Tao Ying Wei Liu Xiaoqin Zeng Unveiling precipitation behavior in Mg-Y based alloys Materials & Design Mg alloys Precipitation behavior Phase transformation HAADF-STEM Density functional theory |
| title | Unveiling precipitation behavior in Mg-Y based alloys |
| title_full | Unveiling precipitation behavior in Mg-Y based alloys |
| title_fullStr | Unveiling precipitation behavior in Mg-Y based alloys |
| title_full_unstemmed | Unveiling precipitation behavior in Mg-Y based alloys |
| title_short | Unveiling precipitation behavior in Mg-Y based alloys |
| title_sort | unveiling precipitation behavior in mg y based alloys |
| topic | Mg alloys Precipitation behavior Phase transformation HAADF-STEM Density functional theory |
| url | http://www.sciencedirect.com/science/article/pii/S0264127521001234 |
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