Combined effects of source hardening and activation of new slip systems on simultaneous enhancement of strength and ductility in fine-grained Mg-3Gd alloy

X. Luo, Guilin Wu, Zongqiang Feng, Junqian Luo, Tianbo Yu, Tianlin Huang, Niels Hansen, Xiaoxu Huang*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

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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 languageEnglish
Title of host publicationProceedings of the 40th Risø International Symposium on Materials Science: Metal Microstructures in 2D, 3D and 4D
Number of pages6
PublisherDTU Mechanical Engineering
Publication date2019
Publication statusPublished - 2019
Event40th Risø International Symposium on Material Science: Metal Microstructures in 2D, 3D, and 4D - Roskilde, Denmark
Duration: 2 Sep 20196 Sep 2019

Conference

Conference40th Risø International Symposium on Material Science: Metal Microstructures in 2D, 3D, and 4D
CountryDenmark
CityRoskilde
Period02/09/201906/09/2019

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