EFFECTS OF OVERLOAD AND SUPPLYING OIL ON CRACK GROWTH BEHAVIOR IN MG ALLOYS
Xuechao Zhang,
Chobin Makabe () and
Tatsujiro Miyazaki ()
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Xuechao Zhang: Graduate School of Engineering and Science, University of the Ryukyus, 1, Sembaru, Nakagami Gun, Nishihara Cho, Okinawa 903-0213, Japan
Chobin Makabe: Department of Mechanical Engineering, Faculty of Engineering, University of the Ryukyus, 1, Sembaru, Nakagami Gun, Nishihara Cho, Okinawa 903-0213, Japan
Tatsujiro Miyazaki: Department of Mechanical Engineering, Faculty of Engineering, University of the Ryukyus, 1, Sembaru, Nakagami Gun, Nishihara Cho, Okinawa 903-0213, Japan
Surface Review and Letters (SRL), 2022, vol. 29, issue 01, 1-8
Abstract:
A single overload was applied during the crack growth process under constant stress amplitude, and retardation of crack growth was observed in the case of magnesium alloys as well as carbon steel, aluminum alloys, etc. The retardation of crack growth was related to crack closure, the fracture surface roughness, and crack tip deformation. In addition, the effects of supplying oil into the crack on crack growth behavior of an overloaded specimen were investigated in this study. The crack growth rate in the case of supplying oil became lower than in the case without supplying oil. In the case of the magnesium alloy AZ31, powder of oxide magnesium appeared from the crack after overloading. It is one of the typical behaviors of AZ31. In the case of AZ31 and AZX912, the crack growth behavior after overloading was slightly different due to the deformation of the crack tip.
Keywords: Fatigue; crack growth; magnesium alloy; overload; supplying oil; crack closure (search for similar items in EconPapers)
Date: 2022
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DOI: 10.1142/S0218625X22500056
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