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Effect of high-density current electropulsing on corrosion cracking of titanium aluminide intermetallic |
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| Authors: | Anatolii Babutskyi Andreas Chrysanthou Ganna Chyzhyk Maider García de Cortázar Pedro Egizabal Marija Smelina |
| Affiliation: | 1. School of Physics, 2. Engineering and Computer Science, University of Hertfordshire, Hatfield, UK Laboratory of Strength and Fracture under Impact and Impulse Loading, G.S. Pisarenko Institute for Problems of Strength, National Academy of Sciences of Ukraine, Kyiv, Ukraine;3. Engineering and Computer Science, University of Hertfordshire, Hatfield, UK;4. Laboratory of Strength and Fracture under Impact and Impulse Loading, G.S. Pisarenko Institute for Problems of Strength, National Academy of Sciences of Ukraine, Kyiv, Ukraine;5. TECNALIA, Basque Research and Technology Alliance (BRTA), Industry and Transport Division, Donostia-San Sebastian, Spain |
| 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. |
| Keywords: | corrosion corrosion cracking electropulsing residual stress titanium aluminide intermetallic |