Journal
JOURNAL OF MAGNESIUM AND ALLOYS
Volume 11, Issue 9, Pages 3382-3393Publisher
KEAI PUBLISHING LTD
DOI: 10.1016/j.jma.2022.03.014
Keywords
Strain-controlled fatigue; Bimodal structure; Fractography; Mg-Gd-Y-Zn-Zr alloy.
Categories
Ask authors/readers for more resources
The strain-controlled cyclic deformation behavior of Mg-9Gd-4Y-2Zn-0.5Zr with different structures was investigated. The bimodal structure exhibited better performance in fatigue tests due to its higher yield strength.
The strain-controlled cyclic deformation behaviour of Mg-9Gd-4Y-2Zn-0.5Zr with different structures was investigated. Alloys were prepared by solution, extrusion and pre-ageing extrusion, and the microstructures before and after the fatigue tests were characterized. Experimental results indicated that the bimodal structure owned the better performance in fatigue test, which was attributed to the higher yield strength. For the equiaxed structure, cyclic hardening induced stress concentration until the failure. Stable cyclic deformation and persistent cyclic softening played an important role at the low and high strain amplitudes, respectively. This was attributed to the formation of fine grains relieving the stress concentration during cyclic loading. In addition, residual twins were observed in equiaxed structure to induce crack, and the bimodal structure effectively restrain it. (c) 2022 Chongqing University. Publishing services provided by Elsevier B.V. on behalf of KeAi Communications Co. Ltd. This is an open access article under the CC BY-NC-ND license ( http://creativecommons.org/licenses/by-nc-nd/4.0/ ) Peer review under responsibility of Chongqing University
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available