Abstract
It is important to understand the effect of molybdenum on the nitrided ferritic stainless steels as it enhances the interstitial diffusion of nitrogen in the ferrite matrix by controlling the precipitation of chromium nitrides and thus minimizes the amount of chromium depletion present in the stainless steels. In this study, Fe–16 wt%Cr–1 wt%Mo, and Fe–16 wt%Cr–2wt%Mo alloys, representative of certain ferritic stainless-steel compositions are prepared via powder metallurgy process route (mechanical alloying followed by compaction and sintering). These specimens are salt bath nitrided at 480 °C for a nitriding time period of 4 h. The phase transformations at the nitrided surfaces were investigated by XRD investigations. The hardness of these nitrided Fe–16%Cr–1%Mo and Fe–16%Cr–2%Mo alloys is measured using a Vickers hardness setup and compared with un-nitrided samples. It is found that an increase in molybdenum content enhanced the surface hardness of these nitrided alloys.
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Subrahmanyam, S., Pardhasaradhi, D.V.T., Savanth, T., Kumar, R.S. (2023). Influence of Molybdenum on Nitride Strengthening of Fe–Cr–Mo Alloys. In: Tewari, A., Dhawan, N., Agarwal, G., Das, S., Mishra, S., Karmakar, A. (eds) Proceedings of the 3rd International Conference on Advances in Materials Processing: Challenges and Opportunities. AMPCO 2022. Springer Proceedings in Physics, vol 293. Springer, Singapore. https://doi.org/10.1007/978-981-99-1971-0_12
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