The Effect of Pre-strain on Fatigue for a High Strength Low Alloy (hsla)steel
نویسندگان
چکیده
D. Aguirre-Guerrero, A. Juárez-Hernández, M.A.L. Hernández-Rodríguez, University Autonumous of Nuevo León, Faculty of Mechanical and Electrical Engineering, Nuevo León, México. R. Morales, I. Ruiz, PEMSA Co. Celaya, Guanajuato, México. The eff ect of initial plastic strain c ycle fatigue lives of HSLA specimens is in vestigated. Specimens were monotonically, quasi-statically loaded under strain control in tension to produce plastic strains (prestrain conditions s0 = 0, s1 = 4,6, s 2 = 35,6 and s 3 = 66,7 % def ormation). Surface analysis on the annealed Zn c oat on the pr estrain sur faces shows that, the higher the def ormation the bigger and deeper the cracks on the Zn c oat. Results sho w that the higher prestrain the higher fatigue resistance for all stress applied, specimens with s3 shows the highest fatigue resistance for these experimental conditions.
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