Abstract
Samples prepared from as-extruded magnesium alloy Mg-3%Al-1%Zn (AZ31) billets were utilized in low-cycle fatigue tests in order to investigate the frequency-dependent fatigue life. Fully reversed strain-controlled tension-compression fatigue tests were carried out at frequencies of 1 Hz and 10 Hz in air. The microstructures were examined by optical microscopy (OM) and scanning electron microscopy (SEM). When the strain amplitude was lower than 0.2%, the fatigue life exhibited a positive correlation with loading frequency, and the activity of twinning was increased at 10 Hz. When the strain amplitude was higher than 0.2%, significant twinning was observed both at these two frequencies, and the fatigue life was found to be independent of frequency. The possible reasons for this frequency-related fatigue lifetime may be due to the dependence of twinning upon loading frequency and strain amplitude.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
S M Yin, H J Yang, S X Li, et al. Cyclic Deformation Behavior of as-Extruded Mg-3%Al-1%Zn[J]. Scripta Materialia, 2008, 58:751–754
L Wu, A Jain, D W Brown, et al. Twinning-Detwinning Behavior during the Strain-Controlled Low-Cycle Fatigue Testing of a Wrought Magnesium Alloy, ZK60A[J]. Acta Materialia, 2008, 56:688–695
F Yang, S M Yin, S X Li, et al. Crack Initiation Mechanism of Extruded AZ31 Magnesium Alloy in the Very High Cycle Fatigue Regime[J]. Materials Science and Engineering, 2008, A 491:131–136
J Koike, N Fujiyama, D Ando, et al. Role of Deformation Twinning and Dislocation Slip in the Fatigue Failure Mechanism of AZ31 Mg Alloys[J]. Scripta Materialia, 2010, 63:747–750
J W Christian, Mahajan S. Deformation Twinning[J]. Progress in Materials Science, 1995, 39:1–157
Q Li, Q Yu, J Zhang, Y Jiang, et al. Effect of Strain Amplitude on Tension-Compression Fatigue Behavior of Extruded Mg6Al1ZnA Magnesium Alloy[J]. Scripta Materialia, 2010, 62: 778–781
P K Liaw, H Wang, L Jiang, et al. Thermographic Detection of Fatigue Gamage of Pressure Vessel Steels at 1 000 Hz and 20 Hz[J]. Scripta Materialia, 2000, 42:389–395
N Urabe, J Weertman. Dislocation Mobility in Potassium and Iron Single Crystals[J]. Materials Science and Engineering, 1975, 18:41–49
Y Furuya, S Matsuoka, T Abe, et al. Gigacycle Fatigue Properties for High-Strength Low-Alloy Steel at 100 Hz,600 Hz, and 20 kHz[J]. Scripta Materialia, 2002, 46: 157–162
M H Yoo. Slip, Twining, and Fracture in Hexagonal Close-Packed Metals[J]. Metallurgic Transaction, 1981, A 12:409–418
M Matsuzuke, S Horibe. Analysis of Fatigue Damage Process in Magnesium Alloy AZ31[J]. Materials Science and Engineering, 2009, A504:169–174
Author information
Authors and Affiliations
Corresponding author
Additional information
Funded by the National Natural Science Foundation of China (No. 50901042) and NUST Research Funding(No. 2011YBXM156)
Rights and permissions
About this article
Cite this article
Zhu, R., Wu, Y., Wang, J. et al. Effect of frequency on fatigue lifetime of extruded Mg-3%Al-1%Zn alloy. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 27, 821–824 (2012). https://doi.org/10.1007/s11595-012-0555-7
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11595-012-0555-7