Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2009-05-01

Journal: JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A

Included Journals: EI、SCIE

Volume: 27

Issue: 3

Page Number: 430-435

ISSN: 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.