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168 results on '"Raja, V. S."'

8. Mitigating Environmentally Assisted Cracking in 7xxx Cu Containing Aluminum Alloys

Author

Ajay Krishnan, M., Raja, V. S., Basu, Bikramjit, Editorial Board Member, Amarendra, G., Editorial Board Member, Bhattacharjee, P. P., Editorial Board Member, Gokhale, Amol A., Editorial Board Member, Kamaraj, M., Editorial Board Member, Manna, Indranil, Editorial Board Member, Mishra, Suman K., Editorial Board Member, Muraleedharan, K., Editorial Board Member, Murty, B. S., Editorial Board Member, Murty, S. V. S. Narayana, Editorial Board Member, Padmanabham, G., Editorial Board Member, Philip, John, Editorial Board Member, Prasad, N. Eswara, Editorial Board Member, Prasad, Rajesh, Editorial Board Member, Rajulapati, Koteswara Rao, Editorial Board Member, Reddy, G. Madhusudan, Editorial Board Member, Srinivasan, A., Editorial Board Member, Sudarshan, T. S., Editorial Board Member, Tarafder, S., Editorial Board Member, Tewari, Raghavendra, Editorial Board Member, Upadhya, Anish, Editorial Board Member, Venkatraman, B., Editorial Board Member, Kamachi Mudali, U., editor, Subba Rao, Toleti, editor, Ningshen, S., editor, G. Pillai, Radhakrishna, editor, P. George, Rani, editor, and Sridhar, T. M., editor

Published
2022
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16. Exploring the Influence of Nanocrystalline Structure and Aluminum Content on High-Temperature Oxidation Behavior of Fe-Cr-Al Alloys.

Author

Kumar, Rajiv, Singh Raman, R. K., Bakshi, S. R., Raja, V. S., and Parida, S.

Subjects
ALUMINUM construction, ALLOY powders, ALLOYS, POWDERS, OXIDATION, GRAIN size, BALL mills
Abstract

The present study examines the high-temperature (500–800 °C) oxidation behavior of Fe-10Cr-(3,5) Al alloys and studies the effect of nanocrystalline structure and Al content on their resistance to oxidation. The nanocrystalline (NC) alloy powder was synthesized via planetary ball milling. The prepared NC alloy powder was consolidated using spark plasma sintering to form NC alloys. Subsequently, an annealing of the NC alloys was performed to transform them into microcrystalline (MC) alloys. It was observed that the NC alloys exhibit superior resistance to oxidation compared to their MC counterparts at high temperatures. The superior resistance to oxidation of the NC alloys is attributed to their considerably finer grain size, which enhances the diffusion of those elements to the metal–oxide interface that forms the protective oxide layer. Conversely, the coarser grain size in MC alloys limits the diffusion of the oxide-forming components. Furthermore, the Fe-10Cr-5Al alloy showed greater resistance to oxidation than the Fe-10Cr-3Al alloy. [ABSTRACT FROM AUTHOR]

Published
2024
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41. Effect of buffer chemistries on the electrochemical corrosion behaviour of three metallic materials.

Author

Palli, Srinivas and Raja, V. S.

Subjects
*ELECTROLYTIC corrosion, *BUFFER solutions, *MILD steel, *ALUMINUM alloys, *METAL ions
Abstract

The influence of chemistry apart from the pH of buffers on the electrochemical corrosion behaviours of mild steel (MS) and 7004 aluminium alloy (AA) was studied using acetate, citrate, and citrate-phosphate buffers having an identical pH of 4. While the buffers showed marginal to insignificant variations in their anodic and cathodic kinetics on Pt, the cathodic current density for MS and AA in these buffers increased in the order citrate < citrate-phosphate < acetate. As for the anodic current density, it increased in the order: acetate < citrate < citrate-phosphate for MS and citrate < acetate < citrate-phosphate for AA. Such variations were explained based on the direct reduction of the weak acids and the complexing behaviour of the metal ions with the buffer species. The study suggests the importance of considering buffer chemistries while studying the influence of pH on electrochemical corrosion including localized corrosion behaviour of metals. [ABSTRACT FROM AUTHOR]

Published
2021
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