Phase analysis and microstructure characterisation of AlSi10Mg parts produced by Selective Laser Melting

被引：112

作者：

Lam, L. P. ^{[1
]}

Zhang, D. Q. ^{[1
]}

Liu, Z. H. ^{[1
]}

Chua, C. K. ^{[2
]}

机构：

[1] UCT Addit Mfg Ctr, Singapore, Singapore

[2] Nanyang Technol Univ, Singapore Ctr 3D Printing, Sch Mech & Aerosp Engn, Singapore, Singapore

来源：

VIRTUAL AND PHYSICAL PROTOTYPING | 2015年 / 10卷 / 04期

关键词：

Selective Laser Melting; AlSi10Mg; microstructure characterisation; transmission electron microscopy;

D O I：

10.1080/17452759.2015.1110868

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Microstructural features of AlSi10Mg samples produced by Selective Laser Melting (SLM) technique were systematically characterised. The results showed that certain amount of Si dissolved in the Al matrix (face centre cubic) to form cellular-dendritic alpha-Al phase. These cells were approximated to be 500 nm. The lattice constant value was found to decrease, resulting from the solid solution of Si in aAl. Along the boundary of these cells, Mg element clusters were also detected where X-Ray diffraction and energy dispersive X-ray spectroscopy results indicated that Mg2Si dispersoid hardening phase was formed during the SLM process. In addition, the network features along the boundary of Al phase were identified to be eutectic Al/Si phase according to the transmission electron microscopy (TEM)-EDS result. Very fine grainy features of nanometric scale were observed within this phase with dimensions less than 5 nm.

引用

页码：207 / 215

页数：9

共 34 条

[1] Microstructural evolution and mechanical, and corrosion property evaluation of Cu-30Ni alloy formed by Direct Metal Deposition process [J].

Bhattacharya, S. ;

Dinda, G. P. ;

Dasgupta, A. K. ;

Natu, H. ;

Dutta, B. ;

Mazumder, J. .

JOURNAL OF ALLOYS AND COMPOUNDS, 2011, 509 (22) :6364-6373

[2] Additive manufactured AlSi10Mg samples using Selective Laser Melting (SLM): Microstructure, high cycle fatigue, and fracture behavior [J].

Brandl, Erhard ;

Heckenberger, Ulrike ;

Holzinger, Vitus ;

Buchbinder, Damien .

MATERIALS & DESIGN, 2012, 34 :159-169

[3] High Power Selective Laser Melting (HP SLM) of Aluminum Parts [J].

Buchbinder, D. ;

Schleifenbaum, H. ;

Heidrich, S. ;

Meiners, W. ;

Bueltmann, J. .

LASERS IN MANUFACTURING 2011: PROCEEDINGS OF THE SIXTH INTERNATIONAL WLT CONFERENCE ON LASERS IN MANUFACTURING, VOL 12, PT A, 2011, 12 :271-278

[4] MICROSTRUCTURE COOLING RATE CORRELATIONS IN MELT-SPUN ALLOYS [J].

CANTOR, B ;

KIM, WT ;

BEWLAY, BP ;

GILLEN, AG .

JOURNAL OF MATERIALS SCIENCE, 1991, 26 (05) :1266-1276

[5]

Chua CK, 2015, 3D PRINTING AND ADDITIVE MANUFACTURING: PRINCIPLES AND APPLICATIONS, THE 4TH EDITION OF RAPID PROTOTYPING: PRINCIPLES AND APPLICATIONS, DOI 10.1142/9008

[6] Effect of Al alloys on selective laser melting behaviour and microstructure of in situ formed particle reinforced composites [J].