An Investigation of Electrolytic Surface Damages and Electroplated Crhomium Effects on Fatigue Behavior of High Strength Steel 2001-01-4054
Fatigue crack initiation occurs at the surface, although sub surface nucleation has also been reported. Localized imperfections like inclusions close to surface and surface small pits can result in crack sources. Coatings are not always beneficial by fatigue point of view too. Mechanical properties of the covering material can change considerably the fatigue behavior of base metal due to residual surface stresses, to micro cracks or to hydrogen embrittlement.
This paper is concerned with analysis of electrolytic etch on the fatigue resistance of a 35NCD16 high strength steel in a mechanical condition of (1760 - 1960) MPa, and analysis of electroplated hard chromium effects on the fatigue resistance in a strength condition of 989 MPa. Hardness impression was used as a reference parameter in case of electrolytic etch. In both cases, experimental data showed that fatigue strength of 35NCD16 steel was considerably reduced.
Citation: de Amorim, C., Voorwald, H., dos Santos Vieira, L., and Pigatin, W., "An Investigation of Electrolytic Surface Damages and Electroplated Crhomium Effects on Fatigue Behavior of High Strength Steel," SAE Technical Paper 2001-01-4054, 2001, https://doi.org/10.4271/2001-01-4054. Download Citation
Carlos Eduardo Silva de Amorim, Herman Jacobus Cornelis Voorwald, Luiz Fábio dos Santos Vieira, Walter Luis Pigatin
State University of São Paulo - UNESP/FEG, Behr Brasil Itada, EMBRAER-LIEBHERR/EDE
SAE Brasil International Conference on Fatigue