Effects of deformation modes on the susceptibility of delayed fracture of advanced high strength steels
The effects of different deformation modes on the susceptibility to delayed fracture in advanced high strength steels (AHSSs) were evaluated using four types of commercially-produced sheet steels (DP780, DP980, TRIP780 and TRIP980). Specimens were strained by either uniaxial tension or bending prior to hydrogen charging and their delayed fracture response was compared with non-deformed samples. Micro hardness testing was performed to assess the effect of deformation on the variation of strength through the thickness of the sheet. Sheet edge effects were minimized by grinding and polishing of the ...
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