Effect of Zener–Holloman Parameter on the Prior Austenite Grain size in a 12Cr-10Ni Precipitation-Hardenable Stainless Steel

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 Z...

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Bibliographic Details
Published in:Journal of materials engineering and performance 2018-07, Vol.27 (7), p.3559-3565
Main Authors: Anoop, C. R., Prakash, Aditya, Narayana Murty, S. V. S., Samajdar, Indradev
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Corrosion and Coatings
Engineering Design
Materials Science
Quality Control
Reliability
Safety and Risk
Tribology
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Summary: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  ≥ 10 22 for obtaining products with good strength–toughness balance.
ISSN:1059-9495
1544-1024
DOI:10.1007/s11665-018-3431-6