Prestrain Effect on Fatigue of DP600 Sheet Steel

Influence of pre‐strain and bake hardening on the static and fatigue strength of a DP600 steel sheet

“…Over the last decades, various researchers studied the effect of prior deformation on the mechanical properties of dual phase steels. Pre‐strain is known to increase yield and tensile strength due to work hardening and reduce ductility 21–25 . Different straining paths, however, result in distinct material response 26–29 .…”

“…Pre-strain is known to increase yield and tensile strength due to work hardening and reduce ductility. [21][22][23][24][25] Different straining paths, however, result in distinct material response. [26][27][28][29] In particular, while a sharp yield point is expected, tensile tests in a direction different to that of pre-strain result in lower elastic limit increment and rounding of the flow curve.…”

“…Gustavsson et al 33,34,36 tested the effect of prestrain on the fatigue properties of DP440 and DP400 steels and found a weak positive influence on LCF. Le et al 24,37 tested fatigue performance of a DP600 sheet steel after uni-axial and plane strain pre-strain. While uniaxially pre-strained specimens exhibited higher fatigue strength compared to as-received condition in the long life domain and lower fatigue strength for life less than 10 3 cycles, plane strain pre-strain did improve fatigue strength throughout its lifetime.…”

Influence of pre-strain and bake hardening on the static and fatigue strength of a DP600 steel sheet

“…Over the last decades, various researchers studied the effect of prior deformation on the mechanical properties of dual phase steels. Pre-strain is known to increase yield and tensile strength due to work hardening and reduce ductility [21][22][23][24][25] . Different straining paths, however, result in distinct material response [26][27][28][29] .…”