Abstract
Hot isothermal plane strain compression (PSC) tests were carried out on a 12Cr-10Ni martensitic precipitation-hardenable (PH) stainless steel, in the temperature range of 750-1050 °C, to study microstructural evolution during large strain deformation. The nature of stress–strain curves varies with Zener–Holloman parameter (Z) with specimens deformed at high Z showing steady-state behavior and those deformed at lower Z showing flow softening. Prior austenite grain size (PAGS), d, exhibited a strong correlation to Z showing a bilinear behavior represented as: d = (1803.9)Z−0.094 for high Z deformation and d = (1456.2)Z−0.058 for low Z deformation. Based on the above study, it is recommended to thermomechanically process 12Cr-10Ni steel at Z ≥ 1022 for obtaining products with good strength–toughness balance.
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Anoop, C.R., Prakash, A., Narayana Murty, S.V.S. et al. Effect of Zener–Holloman Parameter on the Prior Austenite Grain size in a 12Cr-10Ni Precipitation-Hardenable Stainless Steel. J. of Materi Eng and Perform 27, 3559–3565 (2018). https://doi.org/10.1007/s11665-018-3431-6
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DOI: https://doi.org/10.1007/s11665-018-3431-6