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论文类型：期刊论文

发表时间：2009-02-15

发表刊物：APPLIED SURFACE SCIENCE

收录刊物：SCIE、EI、Scopus

卷号：255

期号：9

页面范围：4758-4764

ISSN号：0169-4332

关键字：Low energy high-current pulsed electron beam (LEHCPEB); AISI D2-steel; Electron backscattered diffraction (EBSD); Phase transformation

摘要：A detailed analysis from cross-section of the rapidly solidified layer of a steel formed by low energy high-current pulsed electron beam (LEHCPEB) treatment has been successfully carried out. The results of electron backscattering diffraction (EBSD) measurements revealed that the microstructures and phase components vary dramatically through the melted layer and the heat-affected zone. The exact nature of such a graded structure also changes with the number of pulses. The phase transformation paths vary at different depth and different areas (close to or far away from the carbides). They are determined both by (i) the temperature gradients and (ii) the composition gradients in the surface layers induced by the LEHCPEB treatment. (C) 2008 Elsevier B. V. All rights reserved.