Authors:
David Barbas (Universidad Carlos III de Madrid, Spain)
Wiktoria Krzyzaniak (Łukasiewicz – Poznań Institute of Technology,, Poland)
Dariusz Garbiec (Łukasiewicz – Poznań Institute of Technology,, Poland)
Jose M. Torralba (Universidad Carlos III de Madrid, Spain)
Paula Alvaredo (Universidad Carlos III de Madrid, Spain)
Monica Campos (Universidad Carlos III de Madrid, Spain)
Abstract:
9Cr-1Mo-V-Nb Ferritic|Martensitic (FM) G91 steel, with its excellent creep strength, thermal properties, irradiation resistance, good room temperature mechanical properties and weldability, is an ideal candidate for new generation nuclear reactors and power plants. Conventional methods, such as forging, require time-consuming and energy-intensive heat treatments. In contrast, SPS offers rapid densification and superior microstructure control using pre-alloyed powders. FAST SPS processing ensures low porosity and minimal grain growth, which are essential for improved material properties. In this study, G91 pre-alloyed powder was processed using SPS by varying sintering temperature, heating rate, pressure and holding time to investigate the effect on microstructure and mechanical properties. In addition to mechanical testing using microhardness and PIP measurements, detailed microstructural characterisation was carried out. In addition, the dislocation density was evaluated by X-ray diffraction as it plays a key role in strengthening mechanisms. The results demonstrate the ability of SPS to achieve controlled microstructures, positioning.
DOI:
https://doi.org/10.59499/EP256767981
