Characterization of anisotropic behaviour of ZK60 extrusion under stress-control condition and notes on fatigue modeling
Loading...
Date
2019-10
Authors
Pahlevanpour, A.H.
Behravesh, S.B.
Adibnazari, S.
Jahed, H.
Advisor
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier
Abstract
The anisotropic fatigue behavior of ZK60 is investigated through stress-control tests along two different material directions: extrusion (ED) and radial (RD) directions. The in-plane random texture along RD promotes activation of twinning/detwinning deformations in both tension and compression reversals, which brings about a sigmoidal but near-symmetric shape for hysteresis loops. The stress-strain response along ED is asymmetric, which is attributed to different deformation mechanisms in tension and compression reversals. The higher fatigue strength along ED is related to lower plastic strain energy in this direction. An energy damage parameter showed a good correlation with tests performed in RD and ED.
Description
The final publication is available at Elsevier via https://doi.org/10.1016/j.ijfatigue.2019.05.0301. © 2019.
This manuscript version is made available under the CC-BY-NC-ND 4.0 license
http://creativecommons.org/licenses/by-nc-nd/4.0/
Keywords
wrought magnesium, characterization, fatigue modelling, anisotropy, stress-control