TY - JOUR
T1 - Behavior of 316L stainless steel containing corrosion pits under cyclic loading
AU - Hashim, Muntasir
AU - Farhad, Farnoosh
AU - Smythe-Boyle, David
AU - Akid, Robert
AU - Zhang, Xiang
AU - Withers, Philip J.
PY - 2019/11/1
Y1 - 2019/11/1
N2 - The environmental performance of 316L grade stainless steel, in the form of tensile specimens containing a single corrosion pit with various aspect ratios, under cyclic loading in aerated chloride solutions is investigated in this study. Results from environmental tests were compared and contrasted with those obtained using finite element analysis (FEA). Fractography of the failed specimens obtained from experiments revealed that fatigue crack initiation took place at the base of the shallow pit. The crack initiation shifted towards the shoulder and the mouth of the pit for pits of increasing depth. This process is well predicted by FEA, as the strain contour maps show that strain is the highest around the centric strip of the pit. However, for shallow pits, local strain is uniformly distributed around that strip but begins to concentrate more towards the shoulder and the mouth region for increasingly deep pits.
AB - The environmental performance of 316L grade stainless steel, in the form of tensile specimens containing a single corrosion pit with various aspect ratios, under cyclic loading in aerated chloride solutions is investigated in this study. Results from environmental tests were compared and contrasted with those obtained using finite element analysis (FEA). Fractography of the failed specimens obtained from experiments revealed that fatigue crack initiation took place at the base of the shallow pit. The crack initiation shifted towards the shoulder and the mouth of the pit for pits of increasing depth. This process is well predicted by FEA, as the strain contour maps show that strain is the highest around the centric strip of the pit. However, for shallow pits, local strain is uniformly distributed around that strip but begins to concentrate more towards the shoulder and the mouth region for increasingly deep pits.
KW - 316L stainless steel
KW - Stress Corrosion Cracking (SCC)
KW - corrosion pits
KW - fatigue
KW - pit-to-crack transition
U2 - 10.1002/maco.201810744
DO - 10.1002/maco.201810744
M3 - Article
VL - 70
SP - 2009
EP - 2019
JO - Materials and Corrosion - Werkstoffe und Korrosion
JF - Materials and Corrosion - Werkstoffe und Korrosion
SN - 0947-5117
IS - 11
ER -