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Residual stress relaxation and duty cycle on high cycle fatigue life of micro-arc oxidation coated AA7075-T6 alloy

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journal contribution
posted on 19.08.2021, 18:40 by W Dai, J Hao, C Li, David HeDavid He, D Jia, Y Zhang, Z Tan
Ceramic coatings were produced on AA7075-T6 alloy by micro-arc oxidation (MAO). The MAO treatment was performed at different duty cycles (8, 10, 15, and 20%). Effects of duty cycle on microstructure and fatigue behavior of the coated samples were investigated. Surface features and cross-section morphology, and fatigue fracture were observed by SEM and laser microscope. Phase structure and residual stress in the coatings were analyzed by X-ray diffraction. The nature and relaxation mechanism of the residual stress were revealed. Finally, the influence of the residual stress relaxation on the fatigue life at high and low cyclic stresses was explored.

History

Citation

Dai, W., Hao, J., Li, C., He, D., Jia, D., Zhang, Y.Tan, Z. (2020). Residual stress relaxation and duty cycle on high cycle fatigue life of micro-arc oxidation coated AA7075-T6 alloy. International Journal of Fatigue, 130, 105283-. https://doi.org/10.1016/j.ijfatigue.2019.105283

Publisher

Elsevier BV

Language

en

issn

0142-1123