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

DOI

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.

Identifier
DOI https://doi.org/10.5286/ISIS.E.101133108
Metadata Access https://icatisis.esc.rl.ac.uk/oaipmh/request?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:icatisis.esc.rl.ac.uk:inv/101133108
Provenance
Creator Dr Alex Reul; Dr Wolfgang Schmahl; Mr Christian Lauhoff; Dr Matthias Gutmann; Mr Philipp Krooss
Publisher ISIS Neutron and Muon Source
Publication Year 2022
Rights CC-BY Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Contact isisdata(at)stfc.ac.uk
Representation
Resource Type Dataset
Discipline Construction Engineering and Architecture; Engineering; Engineering Sciences
Temporal Coverage Begin 2019-03-11T10:00:00Z
Temporal Coverage End 2019-03-18T10:00:00Z