Assessment of Influence of Corrosive Environment on Fatigue Performance of Intrinsic CFRP/Steel Hybrids

By Klein, M.; Huelsbusch, D.; Siddique, S.; Walther, F.
Published in Materials Today: Proceedings NULL 2016

Abstract

Abstract Hybrid structures are very attractive for lightweight applications, e.g. in automotive or aircraft industries. For safe and efficient usage in such applications, high fatigue strength and good corrosion resistance are mandatory with regard to loading under service conditions. In the present study the fatigue performance of two intrinsically produced hybrid structures with different steel constituents in air and salt spray environment was investigated to describe the influence of superimposed corrosion loads. Additionally, the corrosion behavior was characterized in potentiodynamic polarization measurements and afterwards correlated with the fatigue results, leading to a quantitatively describable process-structure-property relationship for corrosion influence on fatigue performance of intrinsic CFRP/steel hybrids. Both hybrid structures exhibited galvanic corrosion, wherein one material combination showed significantly higher corrosion rates leading to worse corrosion fatigue behavior in salt spray environment.

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