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Indexed by:期刊论文

Date of Publication:2009-05-01

Journal:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A

Included Journals:SCIE、EI

Volume:27

Issue:3

Page Number:430-435

ISSN No.:0734-2101

Key Words:elastic moduli; elastic waves; electron beam effects; grain size; hardness; stainless steel; substrates; thermal stresses; thermoelasticity

Abstract:High-current pulsed electron beams generate modifications in materials over a depth range of a few hundred micrometers, far beyond the heat-affected zone. In this article, the authors presented relevant experimental results in a stainless steel substrate and described the associated transient thermal and stress processes. They attributed the deep modification to an intense stress wave arising from drastic heating of the materials about 2 similar to 3 mu m below the surface as a result of the deep penetration of electrons. Thanks to the large amplitude at several gigapscals the stress wave exerted intense impacts over a long distance. They also revealed that the interactions were dependent on the grain orientation.