Browsing by Keyword "corrosion"
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Item Effect of high-density current electropulsing on corrosion cracking of titanium aluminide intermetallic(2021-07) Babutskyi, Anatolii; Chrysanthou, Andreas; Chyzhyk, Ganna; de Cortázar, Maider García; Egizabal, Pedro; Smelina, Marija; CIRMETAL; Tecnalia Research & InnovationThe effect of electropulsing on the corrosion cracking of titanium aluminide produced by self-propagating high-temperature synthesis has been investigated. The electropulsing treatment led to improved corrosion resistance in sodium fluoride solution and also eliminated corrosion cracking at the α2/γ interface during corrosion in a solution of nitric and hydrofluoric acids. This behavior was attributed to thermal and athermal effects resulting from electropulsing and leading to the interaction of conduction electrons with the defect structure. The effect of magnetic field accompanying electropusling on depinning of dislocations also has been discussed. Support for this is provided on the basis of X-ray diffraction analysis and microhardness testing.Item New method for estimating the economic penalties of ferrous scraps in the steelmaking industry due to material degradation during its storage in scrap yards(2020-05-27) Vicente, Asier; Picon, Artzai; Barco, Estibaliz; COMPUTER_VISIONThe ever-increasing pressure on the steelmaking industry to reduce its environmental footprint and achieve higher performance ispushing the sector to continuous improvement of its processes, This new paradigm places steel scrap recycling-based manufacturingprocesses as one of the main alternatives for the steelmaking industry. Using heterogeneous recycled scrap mixtures for producing new andhigher performance steel products requires the use of well characterized scrap to reduce uncertainties of the process. However, ferrousscrap might be stored for long periods of time in scrap yards and be affected by atmospheric corrosion that degrades its initial quality. Inthis paper a new empirical methodology is proposed, which helps quantify the influence of this degradation phenomenon on the Electric ArcFurnace (EAF) performance based on the Value In Use (VIU) of the scrap. The equations proposed allow estimating the extra cost induced bydegradation of ferrous scrap material during storage periods.