Preliminary communication

Fatigue Properties of Galvanized Higher-Strength Steel Sheets

M. Buršák
I. Mamuzić

Abstract

The paper analyzes the fatigues properties of galvanized microalloyed steel sheets H220LAD and H380LAD. Under flat bending conditions and the symmetrical cycle, the fatigue limit of the H220LAD sheet is σCo = ± 152 MPa and that of the H380LAD sheet is σCo = ±188 MPa, and the fatigue limit to tensile strength ratio is 0,41 and 0,37, respectively. During fatigue tests with an increasing number of cycles or an increasing stress value, the degradation of the zinc coating increases (relief formation, damage of integrity). As a result, local corrosion, but also continuation of fatigue damage after 107 cycles, and hence corrosion fatigue, can take place during operation.

Keywords

galvanized steel sheet; bending fatigue limit; surface layer degradation

Hrčak ID:

15019

URI

https://hrcak.srce.hr/15019

Publication date:

1.10.2007.

Article data in other languages: croatian

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