Structural changes of TiPt high-temperature shape memory alloys induced by high pressure torsion

Autor(en)

M. Kerber, T. Waitz, M. Matsuda

Abstrakt

The microstructure of a TiPt high temperature shape memory alloy induced by high pressure torsion (HPT) was studied using synchrotron radiation experiments and transmission electron microscopy. Upon the severe plastic deformation, the parent B19 martensite is strongly refined and highly strained. While neither strong chemical disorder nor amorphization are encountered, the occurrence of crystal reflections is observed that can be indexed in terms of the L1

₀ phase and long range ordered stacking structures. The occurrence of the L1

₀ phase might be triggered by the high hydrostatic stress as well as shear stress superimposed during the HPT. The austenite and martensite start and finish temperatures of TiPt are not affected by the HPT since upon heating, recrystallization occurs prior to the onset of the reverse martensite to austenite transformation.

Organisation(en)

Physik Nanostrukturierter Materialien

Externe Organisation(en)

Kumamoto University

Journal

Journal of Alloys and Compounds

Band

935

Anzahl der Seiten

10

ISSN

0925-8388

DOI

https://doi.org/10.1016/j.jallcom.2022.168037

Publikationsdatum

02-2023

Peer-reviewed

Ja

ÖFOS 2012

103018 Materialphysik

Schlagwörter

ASJC Scopus Sachgebiete

Mechanics of Materials, Mechanical Engineering, Metals and Alloys, Materials Chemistry

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/4b189bfd-7678-4b58-a15f-8518cd54a102