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Volume 8
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10.3390/met8040210
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Article

Rotating Bending Fatigue Microscopic Fracture Characteristics and Life Prediction of 7075-T7351 Al Alloy

by
Huihui Yang
1,
Zhihao Zhang
1,
Changhao Tan
1,
Makoto Ito
1,2,
Pan Pan
3 and
Xishu Wang
1,*
1
Department of Engineering Mechanics, School of Aerospace Engineering, Tsinghua University, Beijing 100084, China
2
Biomedical Flow Dynamics Laboratory, Creative Flow Research Division, Institute of Fluid Science, Tohoku University, Sendai 980-8577, Japan
3
Air China Cargo, Tianzhu airport industrial zone A, Beijing 101300, China
*
Author to whom correspondence should be addressed.
Metals 2018, 8(4), 210; https://doi.org/10.3390/met8040210
Submission received: 3 February 2018 / Revised: 16 March 2018 / Accepted: 18 March 2018 / Published: 25 March 2018
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Abstract

Rotating bending fatigue tests were carried out by using the 7075-T7351 Al alloy with a microarc oxidation (MAO) coating (h = 10 μm) and with no coating. Tests were conducted in air and 5.0% NaCl aqueous solution conditions. The fatigue microscopic fracture behavior of the metals was investigated by using scanning electron microscope and three-dimensional digital microscope technologies. The empirical formulas between the stress intensity factor ΔK and the fatigue life Nf in the different conditions were obtained. In addition, the reason for data scattering in the fatigue lives of uncoated 7075-T7351 samples under the same stress amplitude in air was analyzed. Furthermore, the fatigue characteristic life of 7075-T7351 alloy was predicted by the three-parameter Weibull distribution model.
Keywords: aluminum alloy; fatigue fracture; crack propagation; characteristic life; microscopic analysis; Weibull distribution aluminum alloy; fatigue fracture; crack propagation; characteristic life; microscopic analysis; Weibull distribution

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MDPI and ACS Style

Yang, H.; Zhang, Z.; Tan, C.; Ito, M.; Pan, P.; Wang, X. Rotating Bending Fatigue Microscopic Fracture Characteristics and Life Prediction of 7075-T7351 Al Alloy. Metals 2018, 8, 210. https://doi.org/10.3390/met8040210

AMA Style

Yang H, Zhang Z, Tan C, Ito M, Pan P, Wang X. Rotating Bending Fatigue Microscopic Fracture Characteristics and Life Prediction of 7075-T7351 Al Alloy. Metals. 2018; 8(4):210. https://doi.org/10.3390/met8040210

Chicago/Turabian Style

Yang, Huihui, Zhihao Zhang, Changhao Tan, Makoto Ito, Pan Pan, and Xishu Wang. 2018. "Rotating Bending Fatigue Microscopic Fracture Characteristics and Life Prediction of 7075-T7351 Al Alloy" Metals 8, no. 4: 210. https://doi.org/10.3390/met8040210

APA Style

Yang, H., Zhang, Z., Tan, C., Ito, M., Pan, P., & Wang, X. (2018). Rotating Bending Fatigue Microscopic Fracture Characteristics and Life Prediction of 7075-T7351 Al Alloy. Metals, 8(4), 210. https://doi.org/10.3390/met8040210

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