Effect of high-density current electropulsing on corrosion cracking of titanium aluminide intermetallic

Anatolii Babutskyi, Andreas Chrysanthou, Ganna Chyzhyk, Maider G. de Cortazar, Pedro Egizabal, Marija Smelina

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    Abstract

    The 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.
    Original languageEnglish
    Pages (from-to)1243-1248
    Number of pages6
    JournalMaterials and Corrosion
    Volume72
    Issue number7
    Early online date5 Feb 2021
    DOIs
    Publication statusPublished - 31 Jul 2021

    Keywords

    • corrosion
    • corrosion cracking
    • electropulsing
    • residual stress
    • titanium aluminide intermetallic

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