Skip to Main content Skip to Navigation
Journal articles

The cyclic frequency sensitivity of low cycle fatigue (LCF) behavior of the AZ31B magnesium alloy

Abstract : Magnesium alloy components would be potentially subjected to cyclic loads resulting in a fatigue. The low cycle fatigue (LCF) is usually characterized by cyclic plastic deformation which is affected by strain rate. In this study, the LCF behavior of an AZ31B magnesium alloy was investigated at different cyclic frequencies (0.01 Hz, 0.1 Hz, 2.0 Hz and 5.0 Hz) and strain amplitudes (0.75%, 1.0%, 2.0% and 4.0%) under asymmetric loading. It was found that the alloy exhibits a cyclic hardening behavior at all selected strain amplitudes. However, the cyclic frequency exerts an evident effect on the cyclic hardening rate. As the frequency increases, the cyclic hardening rate decreases. In addition, the LCF life increases with increasing cyclic frequency. Based on the discussion of deformation mechanisms, it was confirmed that high strain rate favors (\10-12\< 10-11 > twinning-detwinning and inclines to restrict dislocation slip, resulting in the low cyclic hardening rate and the long LCF life at the high cyclic frequencies.
Document type :
Journal articles
Complete list of metadata

https://hal.univ-lorraine.fr/hal-01513738
Contributor : Lem3 Ul <>
Submitted on : Tuesday, April 25, 2017 - 2:28:45 PM
Last modification on : Thursday, March 11, 2021 - 2:24:17 PM

Identifiers

Citation

G. S. Duan, B. L. Wu, X. H. Du, X. Zhao, Yu Dong Zhang, et al.. The cyclic frequency sensitivity of low cycle fatigue (LCF) behavior of the AZ31B magnesium alloy. Materials Science and Engineering: A, Elsevier, 2014, 603, pp.11-22. ⟨10.1016/j.msea.2014.02.074⟩. ⟨hal-01513738⟩

Share

Metrics

Record views

438