ISIS Neutron and Muon Source Data Journal

In-situ Neutron Diffraction Investigation on Creep-Resistant Ferritic Superalloys Strengthened by Hierarchical-Precipitate Structure

Abstract: We have developed a new class of ferritic steels strengthened by hierarchical precipitates (HPs) of Ni2TiAl/NiAl or a single precipitate (SP) Ni2TiAl for applications as steam-turbine materials. These HPs or SP-ferritic steels exhibit significant improvement of the creep resistance at 973 K in terms of the steady state creep rate and creep rupture time. In particular, the HPs-alloy shows superior creep resistance to the SP-alloy. This trend implies the considerable strengthening arising from the L21 precipitate and the HPs structure. The objective of the proposed research is to use the neutron source using Engin-X at ISIS to observe the lattice-misfit, elastic-strain evolution and load transfer between the precipitate(s) and Fe-matrix during in-situ creep and tension at elevated temperatures, which will provide in-depth understanding of the effect of the HP on the creep behaviors.

Principal Investigator: Dr Peter Liaw
Experimenter: Mr Zhiqian Sun
Experimenter: Mr Shao-Yu Wang
Local Contact: Dr Shu Yan Zhang
Experimenter: Mr Gian Song

DOI: 10.5286/ISIS.E.RB1510172

ISIS Experiment Number: RB1510172

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 Peter Liaw et al; (2015): In-situ Neutron Diffraction Investigation on Creep-Resistant Ferritic Superalloys Strengthened by Hierarchical-Precipitate Structure , STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1510172

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