On the origin of acoustic emission during room temperature compressive deformation of a gamma-TiAl based alloy

Authors
Kauffmann, F Bidlingmaier, T Dehm, G Wanner, A Clemens, H
Citation
F. Kauffmann et al., On the origin of acoustic emission during room temperature compressive deformation of a gamma-TiAl based alloy, INTERMETALL, 8(7), 2000, pp. 823-830
Citations number
19
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
INTERMETALLICS
ISSN journal
09669795 → ACNP
Volume
8
Issue
7
Year of publication
2000
Pages
823 - 830
Database
ISI
SICI code
0966-9795(200007)8:7<823:OTOOAE>2.0.ZU;2-9
Abstract
In this study a two-phase gamma-TiAl based alloy with near gamma microstruc ture was deformed in uniaxial compression at room temperature. The deformat ion experiments were carried out at a strain rate of 2x10(-4) s(-1). The ac oustic emission during deformation was monitored continuously using a root mean square voltmeter. Different annealing experiments between deformation cycles combined with transmission electron microscopy investigations reveal ed the formation of mechanical twins as the decisive mechanism for the acou stic emission. (C) 2000 Elsevier Science Ltd. All rights reserved.