Print Email Facebook Twitter Dealloying-driven local corrosion by intermetallic constituent particles and dispersoids in aerospace aluminium alloys Title Dealloying-driven local corrosion by intermetallic constituent particles and dispersoids in aerospace aluminium alloys Author Kosari, A. (TU Delft (OLD) MSE-6) Tichelaar, F.D. (TU Delft QN/Afdelingsbureau; Kavli institute of nanoscience Delft) Visser, P. (Akzo Nobel) Zandbergen, H.W. (TU Delft QN/Zandbergen Lab; Kavli institute of nanoscience Delft) Terryn, H.A. (Vrije Universiteit Brussel) Mol, J.M.C. (TU Delft (OLD) MSE-6) Date 2020 Abstract Nanoscopic characterization of heterogeneous intermetallic particles (IMPs) which microstructurally and compositionally evolve during local corrosion is crucial in unravelling the mechanisms and sequence of initial and local corrosion events. Herein, we study site-specific initiation events focused on microscopic constituent intermetallic compounds and nanoscopic dispersoids in AA2024-T3 at the nanoscale using a combined quasi in-situ and ex-situ analytical TEM approach. Our findings show a dealloying-driven local corrosion initiation at the studied IMPs that have been considered as cathodic phases traditionally. Besides, local degradation which is a result of galvanic interactions between dealloyed regions of IMPs and their adjacent alloy matrix is largely governed by the intrinsic electrochemical instability of intermetallic compounds. Subject Aerospace aluminium alloysCross-sectional ex-situ TEMDealloyingFIB/SEM analysisPitting corrosionQuasi in-situ TEM To reference this document use: http://resolver.tudelft.nl/uuid:14a039a4-679d-4ba9-8a16-f55e66daf161 DOI https://doi.org/10.1016/j.corsci.2020.108947 ISSN 0010-938X Source Corrosion Science: the journal on environmental degradation of materials and its control, 177 Part of collection Institutional Repository Document type journal article Rights © 2020 A. Kosari, F.D. Tichelaar, P. Visser, H.W. Zandbergen, H.A. Terryn, J.M.C. Mol Files PDF 1_s2.0_S0010938X20316097_main.pdf 11.78 MB Close viewer /islandora/object/uuid:14a039a4-679d-4ba9-8a16-f55e66daf161/datastream/OBJ/view