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Influence of microstructure and alloying elements on corrosion behavior of Ti-13Nb-13Zr alloy |
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| Authors: | M Geetha A.K Gogia Baldev Raj |
| Affiliation: | a Department of Physics, Anna University, Chennai, India b Metallurgy and Materials Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102, India c Defence Metallurgical Research Laboratory, Hyderabad, India d Division of Science and Humanities, MIT, Anna University, Chennai, India |
| Abstract: | This work reports the effect of heat treatment on the corrosion behavior of Ti-13Nb-13Zr alloy in Ringer’s solution. The microstructural evolution of various phases after beta solution treatment (βST) and alpha + beta solution treatment (α+β ST), is studied using optical microscope, electron probe microanalysis and XRD techniques. Corrosion behavior of the solution treated samples is studied in Ringer’s solution using open circuit potential-time measurements and cyclic polarization. Corrosion studies reveal that, the heat-treated samples with depletion of Nb to very high levels in alpha phase exhibit inferior corrosion behavior. Amongst all the heat-treated samples investigated, the water quenched α+β ST specimen exhibit superior corrosion resistance due to the even distribution of the alloying elements in the three phases, namely α,α″ and β. |
| Keywords: | A. Titanium B. Polarization EPMA XRD C. Passivity |
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