Anomalous re-ordering of Fe₃Al disordered by high pressure torsion deformation

Autor(en)

Christoph Gammer, C. Mangler, H. P. Karnthaler, C. Rentenberger

Abstrakt

Severe plastic deformation of bulk DO3 ordered Fe-30 at.%Al was carried out using high pressure torsion to make a chemically disordered nanocrystalline alloy. To achieve re-ordering the alloy was heated to 250, 370 and 500 °C. Transmission electron microscopy investigations reveal that in contrast to the phase diagram B2 ordering occurs at low temperatures. Upon further heating, after the B2 order is already well restored, nanosized DO3 ordered domains grow within large B2 ordered regions. It is proposed that the anomalous re-ordering is triggered by deformation-induced vacancies and other defects leading to the formation of the high-temperature B2 ordered phase.

Organisation(en)

Physik Nanostrukturierter Materialien

Externe Organisation(en)

Österreichische Akademie der Wissenschaften (ÖAW)

Journal

Scripta Materialia

Band

156

Seiten

90-94

Anzahl der Seiten

5

ISSN

1359-6462

DOI

https://doi.org/10.1016/j.scriptamat.2018.06.043

Publikationsdatum

11-2018

Peer-reviewed

Ja

ÖFOS 2012

103042 Elektronenmikroskopie, 103018 Materialphysik

Schlagwörter

ASJC Scopus Sachgebiete

Condensed Matter Physics, Allgemeine Materialwissenschaften

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/51dc3475-8f00-467a-a693-9ead673d4859