Microstructure and Mechanical Properties of AlSi10Mg Parts Produced by the Laser Beam Additive Manufacturing (AM) Technology

被引：193

作者：

Rosenthal I. ^{[1
]}

Stern A. ^{[1
]}

Frage N. ^{[1
]}

机构：

[1] Materials Engineering Department, Ben-Gurion University of the Negev, P.O Box 653, Beersheba

来源：

Metallography, Microstructure, and Analysis | 2014年 / 3卷 / 06期

关键词：

Additive manufacturing; Al alloy; Mechanical properties; Selective laser melting;

D O I：

10.1007/s13632-014-0168-y

中图分类号：

学科分类号：

摘要：

Selective laser melting (SLM) is an additive manufacturing (AM) technique for fabrication of near net-shaped parts directly from computer-aided design data from a series of layers each one melted on top of the previous one by a laser beam. AlSi10Mg specimens were produced by the SLM technique from gas atomized pre-alloyed powders. The study shows the distinctive layered macrostructure, and the extremely fine cellular dendritic microstructure obtained by the SLM AM process, along with the remarkable tensile testing results for AlSi10Mg components. High thermal gradients determine the small grain sizes of the microstructure. Electron microscopy revealed anisotropy of the parts, inherent to the AM-SLM process, dependent on the build orientation. A ductile, dimpled failure mode was observed in these specimens as expected for a relatively ductile microstructure. It is shown that AlSi10Mg parts produced by SLM display room temperature mechanical properties comparable or even exceeding to those of conventionally cast AlSi10Mg. © 2014, Springer Science+Business Media New York and ASM International.

引用

页码：448 / 453

页数：5

共 11 条

[1]

Buchbinder D., Schleifenbaum H., Heidrich S., Meiners W., Bultmann J., High Power Selective Laser Melting (HP SLM) of Aluminum Parts, Phys. Proc, 12, pp. 271-278, (2011)

[2]

Thijs L., Kempen K., Kruth J.P., Humbeeck J.V., Fine-Structured Aluminium Products with Controllable Texture by Selective Laser Melting of Pre-alloyed AlSi10Mg Powder, Acta Mater, 61, pp. 1809-1819, (2013)

[3]

Brandl E., Heckenberger U., Holzinger V., Buchbinder D., Additive Manufactured AlSi10Mg Samples using Selective Laser Melting (SLM): Microstructure, High Cycle Fatigue and Fracture Behavior, Mater. Des, 34, pp. 159-169, (2012)

[4]

Steen W.M., Laser material processing, pp. 279-284, (2003)

[5]

Dinda G.P., Dasgupta A.K., Mazumder J., Evolution of microstructure in laser deposited Al–11.28%Si alloy, Surf. Coat. Technol, 206, pp. 2152-2160, (2012)

[6]

Makhlouf M.M., Guthy H.V., The aluminum–silicon eutectic reaction: mechanisms and crystallography, J. Light Met, 1, pp. 199-218, (2001)

[7]

Wang R., Lu W., Linkov (Intech, Rijeka, 2012, pp. 107-140

[8]

Kou S., Welding Metallurgy, (2003)

[9]

Birol Y., Microstructural characterization of a rapidly-solidified A1–12 wt% Si alloy, J. Mater. Sci, 31, pp. 2139-2143, (1996)

[10]

Standard Specification for Aluminum-Alloy Sand Casting, (2012)

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