Extensive disordering in long-range-ordered Cu3Au induced by severe plastic deformation studied by transmission electron microscopy
- Author(s)
- Christian Rentenberger, Hans-Peter Karnthaler
- Abstract
Bulk nanocrystalline materials can be made by severe plastic deformation. In L12 long-range-ordered alloys, this leads to extensive disordering which influences the highly improved properties of these nanocrystalline alloys. Transmission electron microscopy methods were applied to Cu3Au; both diffraction contrast images and diffraction patterns reveal that disordering takes place locally. It is concluded that in addition to disordering by the refinement of the grown-in antiphase boundary domains, the formation of antiphase boundary tubes is a prominent process of disordering. The latter is facilitated by the fact that, unlike dislocations, antiphase boundary tubes can be stored at a very high density without causing long-range stresses. The local disordering indicates that the nanocrystalline structure nucleates inhomogeneously in the highly strained disordered regions. © 2008 Acta Materialia Inc.
- Organisation(s)
- Physics of Nanostructured Materials
- Journal
- Acta Materialia
- Volume
- 56
- Pages
- 2526-2530
- No. of pages
- 5
- ISSN
- 1359-6454
- DOI
- https://doi.org/10.1016/j.actamat.2008.01.035
- Publication date
- 2008
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103018 Materials physics
- Portal url
- https://ucris.univie.ac.at/portal/en/publications/extensive-disordering-in-longrangeordered-cu3au-induced-by-severe-plastic-deformation-studied-by-transmission-electron-microscopy(eeaabda5-891b-45ce-a9ae-04c249534840).html