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 |
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Country | Denmark |
City | Roskilde |
Period | 02/09/2019 → 06/09/2019 |