ISIS Neutron and Muon Source Data Journal

Martensite Variants and elastic Constants of Co-Ni-Ga Shape Memory Alloys

Abstract: Pseudoelastic Co-Ni-Ga high-temperature shape memory alloys are characterized by a wide range of tunable transformation temperatures and lower processing costs compared to conventional Ni-Ti-X HT-SMA which renders them useful for high-temperature applications in automotive and aerospace industries. In recent studies the fatigue behavior of Co-Ni-Ga single crystals was analysed by TEM and neutron diffraction. It was revealed that functional fatigue is dependent on two processes: increasing defect density and chemical ordering of Co, Ni and Ga. However, two temperature dependent aspects of fatigue behavior remain to be clarified: martensite variant selection under tensile and compressive load and elastic constants of both austenite and martensite. In situ neutron single crystal diffraction is our technique of choice as it allows to reliably investigate both aspects at the same time.

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

DOI: 10.5286/ISIS.E.RB1620168

ISIS Experiment Number: RB1620168

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; (2016): Martensite Variants and elastic Constants of Co-Ni-Ga Shape Memory Alloys, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1620168

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