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论文类型：期刊论文

发表时间：2009-05-01

发表刊物：JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A

收录刊物：SCIE、EI

卷号：27

期号：3

页面范围：430-435

ISSN号：0734-2101

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

摘要：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.