ISIS Neutron and Muon Source Data Journal

Martensite detwinning mechanisms of aged Co-Ni-Ga shape memory alloys

Abstract: Pseudoelastic CoNiGa high-temperature shape memory alloys (HT-SMAs) show a wide range of transformation temperatures and lower processing costs than conventional Ni-Ti-X HT-SMAs which renders them useful for high temperature applications in automotive industries. Recent studies demonstrated stable functional properties from ambient temperature up to 200°C. In addition, heat treatments at intermediate temperatures promote the precipitation of γ´- particles which significantly increases the hardness of the austenite matrix. In particular the γ´ - particle morphology varies with ageing conditions and leads to functional properties which differ from the particle free material. In-situ mechanical tests at elevated temperatures are conducted using the SXD Laue Diffractometer to assess the detwinning mechanism and martensite twin domain relationships in depth.

Principal Investigator: Dr Wolfgang Schmahl
Experimenter: Dr Alex Reul
Experimenter: Mr Christian Lauhoff
Local Contact: Dr Matthias Gutmann
Experimenter: Mr Philipp Krooss

DOI: 10.5286/ISIS.E.RB1910330

ISIS Experiment Number: RB1910330

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 Wolfgang Schmahl et al; (2019): Martensite detwinning mechanisms of aged Co-Ni-Ga shape memory alloys, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1910330

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