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- W1875840061 abstract "corrosion of duplex stainless steel 2205 in short time ageing Mojtaba Dehghanpoor*, Masoumeh Naghizadeh, Mohammad Hadi Moayed Postgraduate student, Metallurgical and Materials Engineering Department, Ferdowsi University of Mashhad, Mashhad91775-11, Iran *Email: mojtaba.de65@gmail.com Associate Professor, Metallurgical and Materials Engineering Department, Ferdowsi University of Mashhad, Mashhad, Iran mhmoayed@um.ac.ir It is well recognized that inappropriate heat treatment deteriorates the intergranular corrosion resistance of duplex stainless steels due to precipitation of deleterious phases such as chromium nitride, chi phase and sigma phase(1) which leads to chromium depletion at grain boundaries(2). It is worth to say that the state of secondary phases depends on previous heat treatment(2). The objective of this work is to study the influence of preliminary solution annealing heat treatment that results in different fraction of ferrite and austenite, on sensitization of 2205 duplex stainless steel at short time ageing. Samples were solution annealed at 1050°C, 1150°C, 1250°C, for 45 min, followed by water quenching. Subsequently, alloy in each annealing condition were submitted to reheating temperature of 850°C for 10 min and 30 min prior to water quenching. It was previously stated that the fastest precipitation rate for sigma phase is at 850°C (1). Degree of sensitization (DOS) was investigated by Double-loop electrochemical potentiokinetic reactivation (DL-EPR) method, using a modified solution for DSS 2205 steel consisted of 0.25 M HCl + 0.002M Na2S2O4. Fig. 1 shows current vs. time curves obtained from DLEPR test for specimens aged at 850◦C at various pre solution annealing temperatures. A multiple current maxima was observed in both anodic and reverse scan indicating different dissolution behavior of two phases due to duplex nature(5, 6)" @default.
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- W1875840061 date "2013-01-01" @default.
- W1875840061 modified "2023-09-27" @default.
- W1875840061 title "Influence of Preheat Treatment On Intergranular Corrosion of Duplex Stainless Steel 2205 in Short Time Ageing" @default.
- W1875840061 doi "https://doi.org/10.1149/ma2013-01/14/689" @default.
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