Please use this identifier to cite or link to this item: https://apo.ansto.gov.au/dspace/handle/10238/12608
Title: The martensitic transformation in In-Tl alloys revisited.
Authors: Finlayson, TR
McIntyre, GJ
Rule, KC
Saxena, A
Keywords: Alloys
Australia
OPAL Reactor
Coherent scattering
Diffraction
Scattering
Iron alloys
Iron base alloys
Martensitic steels
Issue Date: 5-Feb-2019
Publisher: Australian Institute of Physics
Citation: Finlayson, T. R., McIntyre, G. J., Rule, K. C., & Saxena, A. (2019). The martensitic transformation in In-Tl alloys revisited. Poster presented to the 43rd Annual Condensed Matter and Materials Meeting, Charles Sturt University, Wagga Wagga, NSW, 5th February - 8th February, 2019, (p.67). Retrieved from: https://physics.org.au/wp-content/uploads/cmm/2019/Wagga_2019_Conference_Handbook.pdf
Abstract: The traditional view for the martensitic transformation in In-xat%Tl alloys, for 15.5 ≤ 𝑥 ≤ 30.5 was via a double shear such as: (101) [101]; (011) [011], on the basis of optical microscopy observations and measurements of the (𝑐11 - 𝑐12)/2 elastic constant. However, this model was called into question following recent low-ζ measurements of the [ζζ0][ζζ0] phonons. An alternative model for the formation of coherent nuclei and growth along conjugate {111} planes was once proposed by Geisler. This model is consistent with some electron diffuse scattering data as well as yielding identical x-ray pole figure results as those for the double-shear mechanism. Appropriate nuclei could be generated by 〈111〉 〈112〉 atomic displacements. To test such an idea we have measured the [ζζζ]T phonon branch for a good quality In-Tl crystal in a recent experiment using the cold-triple axis facility, SIKA, at the OPAL Research Reactor. These results will be reported and compared with the predictions of a model for the dynamical behaviour of coherent interfaces and modulated structures based on topological solitons, first introduced by Barsch and Krumhansl and applied to the twins accompanying martensitic transformations.
URI: https://physics.org.au/wp-content/uploads/cmm/2019/Wagga_2019_Conference_Handbook.pdf
https://apo.ansto.gov.au/dspace/handle/10238/12608
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