Prediction of fatigue resistance of a hot-dip galvanized steel

被引：27
作者：
Vogt, JB
Boussac, O
Foct, J
机构：
[1] Univ Sci & Technol Lille, Lab Met Phys & Genie Mat, CNRS, UMR 8517, F-59655 Villeneuve Dascq, France
[2] PSA Peugeot CItroen, Direct Organes Proc Bruts Mat, Ctr Tech Velizy, Velizy Villacoublay, France
来源：
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES | 2001年 / 24卷 / 01期
关键词：
fatigue life map; galvanized steel; high cycle fatigue; small crack;
D O I：
10.1046/j.1460-2695.2001.00365.x
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The paper clarifies the effect of a galvanizing coating on the fatigue strength of a ferritic steel. Depending on experimental conditions and on the microstructure of the coating, a reduction in fatigue strength is observed especially when the coating is thick. Cracks in the galvanizing coating rapidly form under cyclic loading and then propagate into the steel substrate. This completely modifies the distribution of crack lengths. Very short cracks are not observed in the steel when galvanized. It is shown that the propagation of a crack in the substrate from the coating is only possible when the crack completely crosses the coating. By assimilating the coating thickness to a crack in the steel substrate, the fatigue resistance of hot-dip galvanized steel can be predicted using the Kitagawa-Takahashi diagram.
引用
收藏
页码：33 / 39
页数：7
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