Abstract
Yield point phenomenon often occurs in fine-grained and ultrafine-grained fcc and bcc metals, which causes a sharp increase in yield stress by source hardening but a rapid decrease in ductility due to the limited work hardening capacity. Here we report that an occurrence of yield point phenomenon in a fine-grained Mg-3Gd alloy can increase the yield stress to a level that facilities the activation of <c+a> type dislocations and their interactions with <a> type dislocations. As a result, not only the yield stress but also the tensile ductility are improved that suggests a new strategy overcoming the conventional strength-ductility trade-off.
| Original language | English |
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| Title of host publication | Proceedings of the 40th Risø International Symposium on Materials Science: Metal Microstructures in 2D, 3D and 4D |
| Number of pages | 6 |
| Publisher | DTU Mechanical Engineering |
| Publication date | 2019 |
| Publication status | Published - 2019 |
| Event | 40th Risø International Symposium on Material Science: Metal Microstructures in 2D, 3D, and 4D - Roskilde, Denmark Duration: 2 Sep 2019 → 6 Sep 2019 |
Conference
| Conference | 40th Risø International Symposium on Material Science: Metal Microstructures in 2D, 3D, and 4D |
|---|---|
| Country | Denmark |
| City | Roskilde |
| Period | 02/09/2019 → 06/09/2019 |
Cite this
Luo, X., Wu, G., Feng, Z., Luo, J., Yu, T., Huang, T., ... Huang, X. (2019). Combined effects of source hardening and activation of new slip systems on simultaneous enhancement of strength and ductility in fine-grained Mg-3Gd alloy. In Proceedings of the 40th Risø International Symposium on Materials Science: Metal Microstructures in 2D, 3D and 4D DTU Mechanical Engineering.