Pulsed laser powder bed fusion additive manufacturing of A356

被引：21

作者：

Chou, S. C. ^{[1
]}

Trask, M. ^{[1
]}

Danovitch, J. ^{[1
]}

Wang, X. L. ^{[1
]}

Choi, J. P. ^{[1
]}

Brochu, M. ^{[1
]}

机构：

[1] McGill Univ, Dept Min & Mat Engn, Montreal, PQ H3A 0C5, Canada

来源：

MATERIALS CHARACTERIZATION | 2018年 / 143卷

关键词：

MECHANICAL-PROPERTIES; MICROSTRUCTURAL DEVELOPMENT; STAINLESS-STEEL; AL-12SI ALLOY; ALUMINUM; ALSI10MG; GROWTH; SOLIDIFICATION; COMPONENTS; EVOLUTION;

D O I：

10.1016/j.matchar.2018.02.004

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A356 (Al7SiMg) specimens were fabricated through pulsed laser powder bed fusion (P-LPBF) additive manufacturing. Microstructural examinations and analyses were carried out through the usage of light optical microscopy (LOM), scanning electron microscopy (SEM), and electron backscatter diffraction (EBSD). The results revealed a fine cellular microstructure with the intercellular network consisting of Al cells and defined by a network of Si arms. The Al cells at the center of the melt pools and within the melt pool boundary bands were measured to be 423 +/- 49 nm and 664 +/- 76 nm, respectively. The presence of a fine columnar grain structure and epitaxial growth on partially melted grains was observed and explained by the KGT model and Hunt's criterion.

引用

页码：27 / 33

页数：7

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