caa a22 4500 463234405 CHVBK 20180405153252.0 cr unu---uuuuu 170326e20070801xx s 000 0 eng 10.1007/s10853-007-1773-9 doi (NATIONALLICENCE)springer-10.1007/s10853-007-1773-9 Influence of microstructure on corrosion behavior of Ti-5%Ta-1.8%Nb alloy [Elektronische Daten] [R. Mythili, A. Ravi Shankar, S. Saroja, V. Raju, M. Vijayalakshmi, R. Dayal, V. Raghunathan, R. Balasubramaniam] This paper presents the results of a study on the influence of microstructure on the corrosion behavior of a α-β Ti-5%Ta-1.8%Nb alloy—a candidate material for use in high concentrations of boiling nitric acid. The "as cast” alloy had a lamellar structure and showed a corrosion rate of about 1.5mpy. Thermo-mechanical processing of the cast alloy resulted in a structure of predominantly of equiaxed α with random distribution of fine β particles. This "reference” structure was further modified employing different heat treatments similar to that for commercial titanium alloys such as mill annealing, solution treatment and aging or over aging treatments. Corrosion rates evaluated in boiling nitric acid in the liquid, vapor and condensate phases, showed low values ∼1mpy. Of these, the lowest corrosion rate (∼0.03mpy) was exhibited by the structure with minimum amount of β phase, distributed in an equiaxed α matrix. This structure was obtained by aging of the solution treated "reference” alloy. Hence, solution treatment high in the α+β phase field followed by aging at a temperature low in the α+β phase field has been identified as the optimum treatment to obtain a microstructure with superior corrosion resistance. Springer Science+Business Media, LLC, 2007 Mythili R. Metallurgy and Materials Group, Indira Gandhi Centre for Atomic Research, 603 102, Kalpakkam, India aut Ravi Shankar A. Metallurgy and Materials Group, Indira Gandhi Centre for Atomic Research, 603 102, Kalpakkam, India aut Saroja S. Metallurgy and Materials Group, Indira Gandhi Centre for Atomic Research, 603 102, Kalpakkam, India aut Raju V. Metallurgy and Materials Group, Indira Gandhi Centre for Atomic Research, 603 102, Kalpakkam, India aut Vijayalakshmi M. Metallurgy and Materials Group, Indira Gandhi Centre for Atomic Research, 603 102, Kalpakkam, India aut Dayal R. Metallurgy and Materials Group, Indira Gandhi Centre for Atomic Research, 603 102, Kalpakkam, India aut Raghunathan V. Metallurgy and Materials Group, Indira Gandhi Centre for Atomic Research, 603 102, Kalpakkam, India aut Balasubramaniam R. Department of Materials and Metallurgical Engineering, Indian Institute of Technology, 208 016, Kanpur, India aut Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/15(2007-08-01), 5924-5935 0022-2461 42:15<5924 2007 42 10853 https://doi.org/10.1007/s10853-007-1773-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-007-1773-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Mythili R. Metallurgy and Materials Group, Indira Gandhi Centre for Atomic Research, 603 102, Kalpakkam, India aut NATIONALLICENCE 700 1- Ravi Shankar A. Metallurgy and Materials Group, Indira Gandhi Centre for Atomic Research, 603 102, Kalpakkam, India aut NATIONALLICENCE 700 1- Saroja S. Metallurgy and Materials Group, Indira Gandhi Centre for Atomic Research, 603 102, Kalpakkam, India aut NATIONALLICENCE 700 1- Raju V. Metallurgy and Materials Group, Indira Gandhi Centre for Atomic Research, 603 102, Kalpakkam, India aut NATIONALLICENCE 700 1- Vijayalakshmi M. Metallurgy and Materials Group, Indira Gandhi Centre for Atomic Research, 603 102, Kalpakkam, India aut NATIONALLICENCE 700 1- Dayal R. Metallurgy and Materials Group, Indira Gandhi Centre for Atomic Research, 603 102, Kalpakkam, India aut NATIONALLICENCE 700 1- Raghunathan V. Metallurgy and Materials Group, Indira Gandhi Centre for Atomic Research, 603 102, Kalpakkam, India aut NATIONALLICENCE 700 1- Balasubramaniam R. Department of Materials and Metallurgical Engineering, Indian Institute of Technology, 208 016, Kanpur, India aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/15(2007-08-01), 5924-5935 0022-2461 42:15<5924 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer