期刊
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
卷 211, 期 1, 页码 113-121出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jmatprotec.2010.09.003
关键词
Aluminium silicon alloys; Epitaxial growth; Rapid solidification; Selective laser sintering; Spheroidisation; Microstructural evolution
资金
- Commonwealth Scholarship Commission in UK at Institute for Materials Research, University of Leeds
The role of processing parameters on the densification mechanism and microstructural evolution in laser sintered Al-12Si powder has been explored. It was established that both the densification mechanism and microstructural evolution in laser sintered Al-12Si powder were controlled by the specific laser energy input. Analysis of the cross-section of laser sintered microstructures of Al-12Si powders indicated that the tops of the grains in the previous layer are partially re-melted and then undergo epitaxial growth in the next layer where the heat affected zones (HAZ) grain boundaries and solidification grain boundaries (SGBs) are continuous along the fusion boundary. (C) 2010 Elsevier B.V. All rights reserved.
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