Preliminary communication

The effect of pre-strain on fatigue for a high strength low alloy (HSLA) steel

D. Aguirre-Guerrero ; University Autonumous of Nuevo Leon, Faculty of Mechanical and Electrical Engineering, Nuevo Leon, Mexico
A. Juárez-Hernández ; University Autonumous of Nuevo Leon, Faculty of Mechanical and Electrical Engineering, Nuevo Leon, Mexico
M. A. L. Hernández-Rodríguez ; University Autonumous of Nuevo Leon, Faculty of Mechanical and Electrical Engineering, Nuevo Leon, Mexico
R. Morales ; PEMSA Co. Celaya, Guanajuato, Mexico
I. Ruiz ; PEMSA Co. Celaya, Guanajuato, Mexico

Abstract

The effect of initial plastic strain cycle fatigue lives of HSLA specimens is investigated. Specimens were monotonically, quasi-statically loaded under strain control in tension to produce plastic strains (prestrain conditions s₀ = 0, s₁ = 4,6, s₂ = 35,6 and s₃ = 66,7 % deformation). Surface analysis on the annealed Zn coat on the prestrain surfaces shows that, the higher the deformation the bigger and deeper the cracks on the Zn coat. Results show that the higher prestrain the higher fatigue resistance for all stress applied, specimens with s₃ shows the highest fatigue resistance for these experimental conditions.

Keywords

HSLA steel; fatigue; predeformation; stamping

Hrčak ID:

92675

URI

https://hrcak.srce.hr/92675

Publication date:

1.4.2013.

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