Title
Cavity nucleation and growth in Cu-Zn-Al irradiated with <tex>$Cu^{+}$</tex> ions at different temperatures Cavity nucleation and growth in Cu-Zn-Al irradiated with <tex>$Cu^{+}$</tex> ions at different temperatures
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Chicago, Ill. ,
Subject
Physics
Source (journal)
Intermetallics / Massachusetts Institute of Technology. - Chicago, Ill.
Volume/pages
18(2010) :4 , p. 493-498
ISSN
0966-9795
ISI
000276058200014
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
The effects of high dose ion irradiation in β CuZnAl were investigated between room temperature and 150 °C. Single crystal samples with surface normal close to [001]β were irradiated with 300 keV Cu+ ions. Microstructural changes were characterized using transmission electron microscopy. Irradiation induced cavities located on the surface exposed to the irradiation were observed. The morphology, size and density distribution of these cavities were analyzed as a function of different irradiation conditions. The shape and location of the cavities with respect to the irradiation surface were not affected by irradiation temperature or irradiation dose. Instead, the cavity size distribution showed a bi-modal shape for a dose of 15 dpa, regardless of irradiation temperature. For a dose of 30 dpa the bi-modal distribution was only observed after room temperature irradiation. The diffusion effects of vacancies produced by irradiation are analyzed in shape memory CuZnAl alloys, which main characteristic is the diffusionless martensitic transformation. Particularly, the cavity size distributions were analyzed in terms of nucleation, growth and coalescence.
E-info
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