Stability of a Ni-rich Ni-Ti-Zr high temperature shape memory alloy upon low temperature aging and thermal cycling Academic Article

abstract

• 2016 Elsevier B.V. The thermal stability of Ni50.3Ti29.7Zr20 with aging in austenite at 250C has been studied for three distinctive microstructures obtained after selected thermal treatments: precipitate free and containing two different sizes and densities of H-phase nanoprecipitates. The martensitic transformation is suppressed after 13weeks aging, depending on the initial microstructure, due to a B2 phase instability in the form of short range atomic reordering within the Ti+Zr sublattice, considered to be precursor to the H-phase precipitation. Thermal cycling leads to notable changes in the transformation temperatures, which strongly depends on the starting microstructure.

authors

• Karaman, Ibrahim

published proceedings

• SCRIPTA MATERIALIA

altmetric score

• 1.1

author list (cited authors)

• Perez-Sierra, A. M., Pons, J., Santamarta, R., Karaman, I., & Noebe, R. D.

citation count

• 34

complete list of authors

• Pérez-Sierra, AM||Pons, J||Santamarta, R||Karaman, I||Noebe, RD

publication date

• November 2016

publisher

• Elsevier  Publisher

published in

• Scripta Materialia  Journal

keywords

• Aging
• Martensitic Phase Transformations
• Phase Instability
• Precipitation
• Shape Memory Alloys

Digital Object Identifier (DOI)

• 10.1016/j.scriptamat.2016.06.029

start page

• 47

end page

• 50

volume

• 124

URL

• http%3A%2F%2Fdx.doi.org%2F10.1016%2Fj.scriptamat.2016.06.029