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Quantitative 3D Characterization for Kinetics of Corrosion Initiation and Propagation in Additively Manufactured Austenitic Stainless Steel.
Li, Jianli; Hughes, Anthony E; Yang, Y S; Laleh, Majid; Wang, Haipeng; Zhang, Xufang; Ma, Jie; Xu, Wei; Tan, Mike Y.
Afiliación
  • Li J; Institute of Theoretical Physics, School of Physics and Electronic Engineering and Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi, 030006, China.
  • Hughes AE; Institute for Frontier Materials, Deakin University, Waurn Ponds, VIC, 3216, Australia.
  • Yang YS; Commonwealth Scientific and Industrial Research Organisation (CSIRO), Private Bag 10, Clayton South, VIC, 3169, Australia.
  • Laleh M; Commonwealth Scientific and Industrial Research Organisation (CSIRO), Private Bag 10, Clayton South, VIC, 3169, Australia.
  • Wang H; Institute for Frontier Materials, Deakin University, Waurn Ponds, VIC, 3216, Australia.
  • Zhang X; School of Engineering, Deakin University, Waurn Ponds, VIC, 3216, Australia.
  • Ma J; Institute of Theoretical Physics, School of Physics and Electronic Engineering and Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi, 030006, China.
  • Xu W; Institute of Theoretical Physics, School of Physics and Electronic Engineering and Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi, 030006, China.
  • Tan MY; State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy and Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi, 030006, China.
Adv Sci (Weinh) ; 9(36): e2201162, 2022 Dec.
Article en En | MEDLINE | ID: mdl-36285796
In situ X-ray computed tomography (X-ray CT) is used to investigate the effects of characteristic microstructural features on the pitting initiation and propagation in austenitic stainless steel specimens prepared with laser powder bed fusion (LPBF) additive manufacturing. In situ X-ray CT in probing the mechanism and kinetics of localized corrosion is demonstrated by immersing two LPBF specimens with different porosities in an aggressive ferric chloride solution for the evaluation of corrosion. X-ray CT images are acquired from the specimens after every 8 hours of immersion over an extended period of time (216 hours). Corrosion pit growth is then quantitatively analyzed with a data-constrained modeling method. The pitting growth mechanism of LPBF stainless steel is found to be different from that of conventional stainless steels. More specifically, the mechanism of corrosion pit initiation is closely correlated with the original lack of fusion porosity (LOF) distribution on the surface of the specimens and preferential pit propagation through the LOF pores inside the specimens. Pit growth kinetics are derived from pit volume changes determined through 3D data analysis. The pit growth kinetics in LPBF specimens are found to vary in the initial pit formation, competitive pit propagation, and the dominant pit growth stages.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Revista: Adv Sci (Weinh) Año: 2022 Tipo del documento: Article País de afiliación: China Pais de publicación: Alemania
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Revista: Adv Sci (Weinh) Año: 2022 Tipo del documento: Article País de afiliación: China Pais de publicación: Alemania