High pressure torsion of intermetallic Zr3Al

Author(s)
David Geist, Christian Rentenberger, Hans-Peter Karnthaler
Abstract

The L12-structured intermetallic compound Zr3Al can be rendered amorphous easily by several techniques. In the present study the structural evolution during high pressure torsion (HPT) was investigated systematically by transmission electron microscopy (TEM) methods. Zr3Al samples were deformed at room temperature to different grades of deformation up to shear strains of 140 000%. TEM investigations revealed that the tendency to grain fragmentation, disordering and the formation of a nanocrystalline structure is weak compared to other L12 ordered alloys like Ni3Al. In addition, an amorphous phase has not been encountered. The present results differ strongly from previous ones obtained from ball-milled materials. Possible reasons for the different behavior are discussed on the basis of the temperature dependent dissociation scheme of the superlattice dislocations gliding in Zr3Al.

Organisation(s)
Physics of Nanostructured Materials
Journal
Materials Science Forum
Volume
584-586
Pages
553-558
No. of pages
6
ISSN
0255-5476
DOI
https://doi.org/10.4028/www.scientific.net/MSF.584-586.553
Publication date
2008
Peer reviewed
Yes
Austrian Fields of Science 2012
103018 Materials physics
Portal url
https://ucris.univie.ac.at/portal/en/publications/high-pressure-torsion-of-intermetallic-zr3al(4db5e509-53a6-49f3-a3d2-a017abd53a6a).html