Rotating Bending Fatigue Microscopic Fracture Characteristics and Life Prediction of 7075-T7351 Al Alloy
作者： Huihui Yang , Zhihao Zhang , Changhao Tan , Makoto Ito , Pan Pan
DOI: 10.3390/MET8040210
关键词: Weibull distribution 、 Fracture mechanics 、 Stress intensity factor 、 Composite material 、 Fracture (geology) 、 Stress (mechanics) 、 Materials science 、 Alloy 、 Scanning electron microscope 、 Coating
摘要: Rotating bending fatigue tests were carried out by using the 7075-T7351 Al alloy with a microarc oxidation (MAO) coating (h = 10 μm) and no coating. Tests conducted in air 5.0% NaCl aqueous solution conditions. The microscopic fracture behavior of metals was investigated scanning electron microscope three-dimensional digital technologies. empirical formulas between stress intensity factor ΔK life Nf different conditions obtained. In addition, reason for data scattering lives uncoated samples under same amplitude analyzed. Furthermore, characteristic predicted three-parameter Weibull distribution model.
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