Effect of aging treatment on the precipitation transformation and age hardening of Mg-Gd-Y-Zn-Zr alloy
In this study, the precipitation transformation and age hardening of solution-treated Mg-9Gd-4Y-2Zn-0.5Zr(wt.%) alloy were investigated at different aging treatment parameters. The precipitation sequences of the alloy aged at 200 ℃, 250 ℃ and 300 ℃ are β″(DO19) → β′(BCO) → β(FCC), β″(DO19) → β′(BCO)...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2023-12-01
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| Series: | Journal of Magnesium and Alloys |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S221395672200072X |
| _version_ | 1797342231701487616 |
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| author | Mu Meng Honglei Zhang Zhi Gao Genxing Lei Jianmin Yu |
| author_facet | Mu Meng Honglei Zhang Zhi Gao Genxing Lei Jianmin Yu |
| author_sort | Mu Meng |
| collection | DOAJ |
| description | In this study, the precipitation transformation and age hardening of solution-treated Mg-9Gd-4Y-2Zn-0.5Zr(wt.%) alloy were investigated at different aging treatment parameters. The precipitation sequences of the alloy aged at 200 ℃, 250 ℃ and 300 ℃ are β″(DO19) → β′(BCO) → β(FCC), β″(DO19) → β′(BCO) → β1(FCC) → β(FCC) and β(FCC), respectively. The streaks sequences of the alloy aged at 200 ℃, 250 ℃ and 300 ℃ are SF, SF → 14H-LPSO and SF → 14H-LPSO, respectively. For the alloy aged at 200 ℃ and 250 ℃, the increase in hardness with increasing aging time is contributed from the increase in precipitate volume fraction and the transformation from β′′ to β′ phase with basal → prismatic and spherical → spindle-like precipitate changes. The decrease in hardness after the peak-aging stage is attributed to the appearance of micro-sized β precipitates. Because of the smaller size of precipitates and the triangular arrangement of β′ precipitate, the hardness of the alloy aged at 200 ℃ is higher than that aged at 250 ℃. For the alloy aged at 300 ℃, the appearance of only micro-sized β precipitate and its coarsening with increasing aging time leads to the lowest hardness and an overall decrease in hardness with the aging time. |
| first_indexed | 2024-03-08T10:30:18Z |
| format | Article |
| id | doaj.art-3bd4e99feb5d49cdbf6540afdb016b21 |
| institution | Directory Open Access Journal |
| issn | 2213-9567 |
| language | English |
| last_indexed | 2024-03-08T10:30:18Z |
| publishDate | 2023-12-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Journal of Magnesium and Alloys |
| spelling | doaj.art-3bd4e99feb5d49cdbf6540afdb016b212024-01-27T06:54:44ZengKeAi Communications Co., Ltd.Journal of Magnesium and Alloys2213-95672023-12-01111246284643Effect of aging treatment on the precipitation transformation and age hardening of Mg-Gd-Y-Zn-Zr alloyMu Meng0Honglei Zhang1Zhi Gao2Genxing Lei3Jianmin Yu4College of Materials Science and Engineering, North University of China, Xueyuan Road 3, Taiyuan 030051, China; Corresponding author.College of Materials Science and Engineering, North University of China, Xueyuan Road 3, Taiyuan 030051, ChinaBeijing North Vehicle Group Corporation, ZhuJiaFen 5th Li, Beijing 100072, ChinaCollege of Materials Science and Engineering, North University of China, Xueyuan Road 3, Taiyuan 030051, ChinaCollege of Materials Science and Engineering, North University of China, Xueyuan Road 3, Taiyuan 030051, ChinaIn this study, the precipitation transformation and age hardening of solution-treated Mg-9Gd-4Y-2Zn-0.5Zr(wt.%) alloy were investigated at different aging treatment parameters. The precipitation sequences of the alloy aged at 200 ℃, 250 ℃ and 300 ℃ are β″(DO19) → β′(BCO) → β(FCC), β″(DO19) → β′(BCO) → β1(FCC) → β(FCC) and β(FCC), respectively. The streaks sequences of the alloy aged at 200 ℃, 250 ℃ and 300 ℃ are SF, SF → 14H-LPSO and SF → 14H-LPSO, respectively. For the alloy aged at 200 ℃ and 250 ℃, the increase in hardness with increasing aging time is contributed from the increase in precipitate volume fraction and the transformation from β′′ to β′ phase with basal → prismatic and spherical → spindle-like precipitate changes. The decrease in hardness after the peak-aging stage is attributed to the appearance of micro-sized β precipitates. Because of the smaller size of precipitates and the triangular arrangement of β′ precipitate, the hardness of the alloy aged at 200 ℃ is higher than that aged at 250 ℃. For the alloy aged at 300 ℃, the appearance of only micro-sized β precipitate and its coarsening with increasing aging time leads to the lowest hardness and an overall decrease in hardness with the aging time.http://www.sciencedirect.com/science/article/pii/S221395672200072XMg-Gd-Y-Zn-Zr alloyAging treatmentPrecipitation transformationAge hardening |
| spellingShingle | Mu Meng Honglei Zhang Zhi Gao Genxing Lei Jianmin Yu Effect of aging treatment on the precipitation transformation and age hardening of Mg-Gd-Y-Zn-Zr alloy Journal of Magnesium and Alloys Mg-Gd-Y-Zn-Zr alloy Aging treatment Precipitation transformation Age hardening |
| title | Effect of aging treatment on the precipitation transformation and age hardening of Mg-Gd-Y-Zn-Zr alloy |
| title_full | Effect of aging treatment on the precipitation transformation and age hardening of Mg-Gd-Y-Zn-Zr alloy |
| title_fullStr | Effect of aging treatment on the precipitation transformation and age hardening of Mg-Gd-Y-Zn-Zr alloy |
| title_full_unstemmed | Effect of aging treatment on the precipitation transformation and age hardening of Mg-Gd-Y-Zn-Zr alloy |
| title_short | Effect of aging treatment on the precipitation transformation and age hardening of Mg-Gd-Y-Zn-Zr alloy |
| title_sort | effect of aging treatment on the precipitation transformation and age hardening of mg gd y zn zr alloy |
| topic | Mg-Gd-Y-Zn-Zr alloy Aging treatment Precipitation transformation Age hardening |
| url | http://www.sciencedirect.com/science/article/pii/S221395672200072X |
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