Influence of Ag on the precipitates in Mg-8Gd-0.8Y-0.5Zn-0.3Zr alloy
This paper investigates the influence of Ag element on the microstructure and mechanical properties, as well as the synergistic strengthening and toughening mechanisms of the Mg-8Gd-0.8Y-0.5Zn-0.3Zr alloy. The study shows that the addition of 0.1 wt% Ag increases the yield strength, ultimate tensile...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-01-01
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| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424028837 |
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| Summary: | This paper investigates the influence of Ag element on the microstructure and mechanical properties, as well as the synergistic strengthening and toughening mechanisms of the Mg-8Gd-0.8Y-0.5Zn-0.3Zr alloy. The study shows that the addition of 0.1 wt% Ag increases the yield strength, ultimate tensile strength, and elongation to 225 MPa, 338 MPa, and 16.5%, respectively, which are 25%, 14%, and 73% higher compared to the Ag-free alloy. The introduction of Ag increases the aspect ratio of nanoscale precipitates β′ phases from 4.4:1 to 6:1, enhancing the ability of dislocation pinning and thereby improving the alloy's strength. Moreover, Ag addition can reduce the volume fraction of 18R-LPSO phases, increases the numbers of I1 (ABCB) and I2 (ABCA) stacking faults, and particularly enhancing the activation of <c+a> slip systems, thus promoting the alloy's ductility. |
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| ISSN: | 2238-7854 |