Precipitate characteristics and precipitation-strengthening mechanism of Mg-13Gd-4Y–2Zn-0.6Zr alloy
In this study, the precipitate characteristics and precipitation-strengthening mechanism of solution-treated Mg-13Gd-4Y–2Zn-0.6Zr alloy after the upsetting and extrusion were investigated at different aging treatment temperatures. The prismatic plate-shaped nano-sized β′ precipitates and the prismat...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-03-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423003757 |
| _version_ | 1797858768992600064 |
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| author | Mu Meng Genxing Lei Honglei Zhang Xuhui Zhang Jianmin Yu |
| author_facet | Mu Meng Genxing Lei Honglei Zhang Xuhui Zhang Jianmin Yu |
| author_sort | Mu Meng |
| collection | DOAJ |
| description | In this study, the precipitate characteristics and precipitation-strengthening mechanism of solution-treated Mg-13Gd-4Y–2Zn-0.6Zr alloy after the upsetting and extrusion were investigated at different aging treatment temperatures. The prismatic plate-shaped nano-sized β′ precipitates and the prismatic rod-shaped micro-sized β precipitates were precipitated in low-temperature (e.g. 170 °C) and high-temperature (e.g. 330 °C) aging treatment, respectively. The critical nucleation resolved shear stresses (CRSSN) for the observed {10–12} and {11–21} extension twins and the twin number fractions of the two-type twins in the total twin number were unaffected by the precipitates. However, the greater total twin number in the alloy aged at 330 °C indicates that the strengthening effect of β precipitates on twinning was greater than that of β′ precipitates. The calculation results of Orowan equation showed that the strengthening effect of β′ precipitates on the pyramidal slip was greater than that of β precipitates. The greater hardness for the alloy aged at 170 °C was attributed to the greater strengthening effect of β′ precipitates on the pyramidal slip. |
| first_indexed | 2024-04-09T21:18:44Z |
| format | Article |
| id | doaj.art-bb54831309a24c4bb53b648c712ef0b8 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-09T21:18:44Z |
| publishDate | 2023-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-bb54831309a24c4bb53b648c712ef0b82023-03-28T06:48:44ZengElsevierJournal of Materials Research and Technology2238-78542023-03-012357835795Precipitate characteristics and precipitation-strengthening mechanism of Mg-13Gd-4Y–2Zn-0.6Zr alloyMu Meng0Genxing Lei1Honglei Zhang2Xuhui Zhang3Jianmin Yu4Corresponding author.; College 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, 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, ChinaCollege of Materials Science and Engineering, North University of China, Xueyuan Road 3, Taiyuan, 030051, ChinaIn this study, the precipitate characteristics and precipitation-strengthening mechanism of solution-treated Mg-13Gd-4Y–2Zn-0.6Zr alloy after the upsetting and extrusion were investigated at different aging treatment temperatures. The prismatic plate-shaped nano-sized β′ precipitates and the prismatic rod-shaped micro-sized β precipitates were precipitated in low-temperature (e.g. 170 °C) and high-temperature (e.g. 330 °C) aging treatment, respectively. The critical nucleation resolved shear stresses (CRSSN) for the observed {10–12} and {11–21} extension twins and the twin number fractions of the two-type twins in the total twin number were unaffected by the precipitates. However, the greater total twin number in the alloy aged at 330 °C indicates that the strengthening effect of β precipitates on twinning was greater than that of β′ precipitates. The calculation results of Orowan equation showed that the strengthening effect of β′ precipitates on the pyramidal slip was greater than that of β precipitates. The greater hardness for the alloy aged at 170 °C was attributed to the greater strengthening effect of β′ precipitates on the pyramidal slip.http://www.sciencedirect.com/science/article/pii/S2238785423003757Mg-Gd-Y-Zn-Zr alloyAging treatmentPrecipitatesPrecipitation-strengthening mechanism |
| spellingShingle | Mu Meng Genxing Lei Honglei Zhang Xuhui Zhang Jianmin Yu Precipitate characteristics and precipitation-strengthening mechanism of Mg-13Gd-4Y–2Zn-0.6Zr alloy Journal of Materials Research and Technology Mg-Gd-Y-Zn-Zr alloy Aging treatment Precipitates Precipitation-strengthening mechanism |
| title | Precipitate characteristics and precipitation-strengthening mechanism of Mg-13Gd-4Y–2Zn-0.6Zr alloy |
| title_full | Precipitate characteristics and precipitation-strengthening mechanism of Mg-13Gd-4Y–2Zn-0.6Zr alloy |
| title_fullStr | Precipitate characteristics and precipitation-strengthening mechanism of Mg-13Gd-4Y–2Zn-0.6Zr alloy |
| title_full_unstemmed | Precipitate characteristics and precipitation-strengthening mechanism of Mg-13Gd-4Y–2Zn-0.6Zr alloy |
| title_short | Precipitate characteristics and precipitation-strengthening mechanism of Mg-13Gd-4Y–2Zn-0.6Zr alloy |
| title_sort | precipitate characteristics and precipitation strengthening mechanism of mg 13gd 4y 2zn 0 6zr alloy |
| topic | Mg-Gd-Y-Zn-Zr alloy Aging treatment Precipitates Precipitation-strengthening mechanism |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423003757 |
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