Slip deformation and melt threshold in laser‐pulse‐irradiated Al
作者:
D. M. Follstaedt,
S. T. Picraux,
P. S. Peercy,
W. R. Wampler,
期刊:
Applied Physics Letters
(AIP Available online 1981)
卷期:
Volume 39,
issue 4
页码: 327-329
ISSN:0003-6951
年代: 1981
DOI:10.1063/1.92709
出版商: AIP
数据来源: AIP
摘要:
We have examined pulse laser‐irradiated 〈110〉 Al single crystals near the threshold energy for melting by ion channeling and electron microscopy. We find that slip deformation occurs at incident energies <3.5 J/cm2, where melting does not occur for our 20 nsec (full width at half maximum) pulse width, as well as at energies ≳3.5J/cm2, where a near‐surface layer is melted. This slip deformation results in an increase in the channeling minimum yield &khgr;min, which is attributed to small‐angle misalignments between slip planes across the surface. The abrupt increase in &khgr;minwith melting suggests that channeling can provide a sensitive monitor of the threshold for melting.
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