ISIS Neutron and Muon Source Data Journal

Evaluation of Dislocation Character in Eurofer97 around the Ductile-to-Brittle Transition Temperature

Abstract: The characterisation and development of structural materials for nuclear fusion reactors poses a significant challenge to the adoption of fusion energy. Eurofer97 (E97) is a front running reduced activation ferritic martensitic steel candidate in this area. It is important that candidate materials maintain their structural properties, and a comprehensive understanding of the ductile to brittle transition (DBT) is therefore desirable. This work will utilise in-situ neutron diffraction of E97 tensile samples at temperatures around the DBT to evaluate changing dislocation behaviour. Through analysis of shifting peak position and width, the dislocation density and character, as well as the elastic properties and yield flow stress of E97 around the DBT will be established. Dislocation character is strongly linked to embrittlement, and this work represents a novel means of evaluating the DBT.

Public release date: 18 December 2027

Principal Investigator: Dr Biao Cai
Experimenter: Mr Tay Sparks
Experimenter: Dr Yiqiang Wang
Local Contact: Dr Tung Lik Lee
Experimenter: Dr Xiaohui Bian
Experimenter: Mr Yufei Jin

DOI: 10.5286/ISIS.E.RB2220063-1

Parent DOI: 10.5286/ISIS.E.RB2220063

ISIS Experiment Number: RB2220063

Part Number: 1

Date of Experiment: 13 December 2024

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
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Data Citation

The recommended format for citing this dataset in a research publication is as:
[author], [date], [title], [publisher], [doi]

For Example:
Dr Biao Cai et al; (2024): Evaluation of Dislocation Character in Eurofer97 around the Ductile-to-Brittle Transition Temperature, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2220063-1

Data is released under the CC-BY-4.0 license.