Title: Stabilization and hyperstabilization of Cu-Al-Be ß'1 martensite by thermal treatment and plastic deformation
Authors: Kustov, Sergey ×
Pons, J.
Cesari, E.
Van Humbeeck, Jan
Morin, M. #
Issue Date: Jul-2004
Publisher: Elsevier Sequoia
Series Title: Materials Science and Engineering A, Structural Materials: Properties, Microstructure and Processing vol:378 issue:1-2 pages:283-288
Abstract: Cu-AI-Be beta'(1) martensite exhibits different levels of stabilization after various heat treatments (direct quenching into martensite, step-quenching, air cooling). However, this stabilization does not demonstrate time dependence upon martensite ageing at around room temperature, and can be considered as instantaneous. Cu-Al-Be martensite also stabilizes as a result of deformation of martensite starting from rather low values of prestrain. The conclusion is drawn that Cu-Al-Be alloy exhibits purely "mechanical" stabilization both after heat treatments and upon plastic deformation due to jamming the motion of interfaces. Non-elastic accommodation of transformation strain under a combined action of transformation stress and residual thermal stresses during the first direct martensitic transformation (MT), and "kinetic" stabilization due to sweeping-up of quenched-in defects during the martensitic transformation are considered as possible mechanisms of the observed instantaneous stabilization registered after heat treatment. (C) 2003 Published by Elsevier B.V.
ISSN: 0921-5093
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Physical Metallurgy and Materials Engineering Section (-)
× corresponding author
# (joint) last author

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