Plasticity of single-grain icosahedral Al-Pd-Mn quasi-crystals deformed at room temperature

Journal Article · Mon Jul 12 00:00:00 EDT 2004 · Acta Materialia

DOI:https://doi.org/10.1016/j.actamat.2004.04.013· OSTI ID:20634722

Mompiou, F; Caillard, D

Transmission electron microscopy observations have been performed on icosahedral Al-Pd-Mn quasi-crystal samples deformed at 20 deg. C under a high confining pressure. They reveal a large density of wavy walls from which several climbing dislocations are emitted. Near-screw dislocations have been found at the wall terminations with a Burgers vector contained in the wall plane. Careful plane determinations and dislocation analyses are not consistent with a glide and cross-slip mechanism. The results can be better interpreted as a deformation by cracks in mode III followed by a re-healing process.

• OSTI ID: 20634722
• Journal Information: Acta Materialia, Vol. 52, Issue 12; Other Information: DOI: 10.1016/j.actamat.2004.04.013; PII: S1359645404002290; Copyright (c) 2004 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 1359-6454
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
BURGERS VECTOR
CRACKS
CRYSTALS
DEFORMATION
MANGANESE ALLOYS
PALLADIUM ALLOYS
PLASTICITY
SCREW DISLOCATIONS
TEMPERATURE RANGE 0273-0400 K
TRANSMISSION ELECTRON MICROSCOPY