Pitting, lacy covers, and pit merger in stainless steel: 3D peridynamic models
作者： Siavash Jafarzadeh , Ziguang Chen , Jiangming Zhao , Florin Bobaru
DOI: 10.1016/J.CORSCI.2019.01.006
关键词: Pitting corrosion 、 Metallurgy 、 Diffusion (business) 、 Passivation 、 Corrosion 、 Materials science
摘要: Abstract A new three-dimensional peridynamic (PD) model is introduced for pitting corrosion damage. Based on simple mechanistic views of passivation, salt-layer presence, and passive-film rupture, the simulates damage in stainless steel 3D, with autonomous formation lacy covers. Computed morphologies are strikingly similar to real pits. The validated against experiments. Merger two 3D pits studied PD results compare well imply that first-order factors determine rate, pit shape/size, cover morphology those included our model: diffusion, concentration-based damage, formation.
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