PSI - Issue 71

Poshadri Chathri et al. / Procedia Structural Integrity 71 (2025) 309–316

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● According to the observation, overall, comparing all conditions for the random orientation, pits with a 1.76 aspect ratio demonstrate the highest SCF of 3.51 at horizontal attack type of pit., while spherical pits with an inline orientation and a 0.69 aspect ratio exhibit the lowest SCF of 2.87. Overall, as the aspect ratio increases, there is a corresponding increase in SCF across all pit shapes and orientations. ● It was observed that spherical pits exhibit a lower SCF compared to pits of different shapes, and inline orientations tend to have a higher SCF than random orientations, which indicates that different shapes of pits with inline orientation will initiate fracture more quickly, while spherical pits with random orientation will delay fracture initiation based on the elongation. 5. References Abdo, H. S., and Seikh, A. H. 2021. Role of NaCl, CO 2 , and H 2 S on Electrochemical Behavior of 304 Austenitic Stainless Steel in Simulated Oil Industry Environment. Metals , 11 (9), 1347. ASTM E8. (2010). ASTM E8/E8M standard test methods for tension testing of metallic materials 1. Annual Book of ASTM Standards 4, C, 1–27. Cerit, Muhammet. (2019). Corrosion pit-induced stress concentration in spherical pressure vessel. Thin-Walled Structures. Anon. 1985. Standard Practice for Preparing, Cleaning, and Evaluating Corrosion Test Specimens. ASTM Special Technical Publication, i(Reapproved), 505–510.. Burstein, Gt Souto, Ricardo Liu, C and Vines, Sp. 2004. New processes for passive metal surfaces. Corros. Mater. 29, S1–S4. Eken, T. Y., Kardelen, K., Celebı, N., Oktem, M. F. 2016. Pitting corrosion behaviour of ST 37 structural steel in several corrosive environments. The International Journal of Energy and Engineering Sciences, 1(3), 33-48. Jian, Li Huanjun, Zheng Ke, Wang and Xuehui, Wang. 2015. Corrosion Behavior of SS-304 in NaCl Solution at Different Temperatures Using Electrochemical Noise Technique. International Journal of Electrochemical Science. Jiang, J.-y., Liu, Y., Chu, H.-y., Wang, D., Ma, H., and Sun, W. 2017. Pitting Corrosion Behaviour of New Corrosion-Resistant Reinforcement Bars in Chloride-Containing Concrete Pore Solution. Materials, 10(8), 903. Lakkam, Kiran Kerur, Shirish and Shirahatti, Anilkumar. 2019. Experimental investigation of effect of pitting corrosion on the mechanical properties of 304 grade stainless steel without heat treatment. AIP Conference Proceedings. 2166. Liu, Wei Zhang, Min and Li, Jiaqi Wu, Jinjie and Meng, Zhenghua and Huang, Shangyu. 2023. Formability of SS304 stainless steel foil at elevated strain-rate. Journal of Materials Research and Technology. 26. Mu, Zhi Chen, Ding and Zhu, Zuo and Ye, Bin. 2010. The Stress Concentration Factor of Different Corrosion Pits Shape. Advanced Materials Research. 152-153. 1115-1119. Santos, A. 2013. Determination of stress concentration factors on flat plates of structural steel. Journal of Physics Conference Series. 466. 2035-.