Unravelling dynamic recrystallisation in a microalloyed steel during rapid high temperature deformation using synchrotron X-rays
Microstructure evolution during high-strain rate and high-temperature thermo-mechanical processing of a 44MnSiV6 microalloyed steel is investigated using in situ synchrotron high-energy powder X-ray diffraction. The conditions selected replicate a newly developed near solidus high-strain rate process designed for reducing raw material use during the hot processing of steels. High temperatures (exceeding 1300 °C) and high strain rate ε˙ = 9 s-1 processing regimes are explored. The lattice strains and dislocation activity estimated from diffraction observations reveal that the microstructure evolution is primarily driven by dynamic recrystallisation. A steady-state stress regime is observed during deformation, which develops due to intermittent and competing work hardening and recovery processes. The texture evolution during the heating, tension, shear deformation and cooling stages is systematically investigated. The direct observation of phase evolution at high-temperature and high-strain rate deformation enables a comprehensive understanding of new manufacturing processes and provides deep insights for the development of constitutive models for face-centred cubic alloys.
Authors
- Gorka Plata (ORCID: https://orcid.org/0000-0003-4606-8185)
- M.A. Azeem (ORCID: https://orcid.org/0000-0002-4547-503X)
- Ben Thomas (ORCID: https://orcid.org/0000-0002-3986-213X)
- Michael Preuß (ORCID: https://orcid.org/0000-0003-3806-0415)
- T. Wigger (ORCID: https://orcid.org/0000-0003-1395-7605)
- Š. Michalik (ORCID: https://orcid.org/0000-0001-9459-322X)
- Thomas Kwok (ORCID: https://orcid.org/0009-0002-2047-6973)
- Simon A. Hunt (ORCID: https://orcid.org/0000-0003-3817-8835)
- David Dye (ORCID: https://orcid.org/0000-0002-8756-3513)
- Iñaki Hurtado (ORCID: https://orcid.org/0000-0002-7117-5030)
- Jokin Lozares (ORCID: https://orcid.org/0000-0002-8879-5762)
- Kai Zhang (ORCID: https://orcid.org/0000-0001-5885-6424)
- Peter Lee (ORCID: https://orcid.org/0000-0002-3898-8881)
- Rosa Pineda
Institutions
- Universidad de Deusto (ES)
- University of Leicester (GB)
- Mondragon Unibertsitatea (ES)
- Luleå University of Technology (SE)
- Diamond Light Source (GB)
- University of Manchester (GB)
- Swansea University (GB)
- Research Complex at Harwell (GB)
- Division of Materials Science and Engineering (AU)
- University College London (GB)
- Imperial College London (GB)
- Monash University (AU)
- University of Sheffield (GB)
Publication Details
- Journal
- Acta Materialia
- Published
- 2024-08-05
- DOI
- https://doi.org/10.1016/j.actamat.2024.120265
- Citations
- 3
- Primary Topic
- Microstructure and Mechanical Properties of Steels
- Type
- article
- Field-Weighted Citation Impact
- 0.64
Funders
- Royal Academy of Engineering
- Sight Research UK
- European Commission
- Engineering and Physical Sciences Research Council
- Natural Environment Research Council
- Research Fund for Coal and Steel