Abstract
High strength Al 7075 powder was successfully deposited on the AZ31B as-cast dog bone samples. The electro chemical corrosion behavior of AZ31B samples in coated and uncoated condition was examine in 3.5% NaCl aqueous solution at the room temperature. At the same time, the rotating bending fatigue behavior was studied in the similar environmental condition. It is seen that the as deposited cold sprayed alloy obtained lower corrosion resistance compared to the bulk Al 7075 alloy available in the literature, while a significant corrosion resistance was increased in AZ31B alloy with Al 7075 coat. At the same time, the coated sample achieved longer fatigue life compared to the uncoated sample in corrosive environment. The fatigue fracture surface analysis shows that pitting holes were formed at the surface and penetrated up to the coating/substrate interface that basically nucleates the fatigue crack leading to the fatigue fracture.
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Acknowledgements
The authors would like to gratefully acknowledge the financial support of the Natural Sciences and Engineering Research Council of Canada (NSERC), Automotive Partnership Canada (APC) program under APCPJ 459269–13 grant with contributions from Multimatic Technical Centre, Ford Motor Company, and Centerline Windsor.
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Shaha, S.K., Dayani, S.B., Jahed, H. (2018). Influence of Cold Spray on the Enhancement of Corrosion Fatigue of the AZ31B Cast Mg Alloy. In: & Materials Society, T. (eds) TMS 2018 147th Annual Meeting & Exhibition Supplemental Proceedings. TMS 2018. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-72526-0_51
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DOI: https://doi.org/10.1007/978-3-319-72526-0_51
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