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Characterization of Al–Fe–V–Si heat-resistant aluminum alloy components fabricated by selective laser melting

Published online by Cambridge University Press:  04 May 2015

Shaobo Sun ,
Lijing Zheng ,
Yingying Liu ,
Jinhui Liu  and
Hu Zhang
Shaobo Sun
Affiliation:
School of Materials Science and Engineering, Beihang University, Beijing 100191, People's Republic of China
Lijing Zheng*
Affiliation:
School of Materials Science and Engineering, Beihang University, Beijing 100191, People's Republic of China
Yingying Liu
Affiliation:
School of Materials Science and Engineering, Beihang University, Beijing 100191, People's Republic of China
Jinhui Liu
Affiliation:
Modern Manufacturing Engineering Center, Heilongjiang Institute of Science and Technology, Harbin 150027, People's Republic of China
Hu Zhang
Affiliation:
School of Materials Science and Engineering, Beihang University, Beijing 100191, People's Republic of China
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Heat-resistant Al–8.5Fe–1.3V–1.7Si (wt%) aluminum alloy components were fabricated using selective laser melting (SLM). The as-built samples were examined in terms of density, chemical composition, surface morphologies, microstructures, and mechanical behavior. The results show that nearly full dense samples with the relative density of 99.3% can be produced. The chemical composition of the deposited material is close to that of the powder, presenting a limited aluminum loss and a low oxygen pickup. The SLM specimens consist of three typical zones: the fusion zone (FZ), the remelting border zone (RBZ), and the heat-affected zone (HAZ). Ultrafine continuous cellular α-Al networks are observed in the FZ. The HAZ exhibits fine rounded Al12(Fe,V)3Si particles (10–70 nm) distributed homogeneously in the α-Al matrix, while the rectangle-like AlmFe-type phase (m = 4.0–4.4) with 100–500 nm in size is preferably formed in the RBZ. The microhardness of the parts shows directional independent, with a mean value of 246 HV0.1.

Keywords

powder processingmicrostructurehardness
Type
Articles
Information
Journal of Materials Research , Volume 30 , Issue 10 , 28 May 2015 , pp. 1661 - 1669
Copyright
Copyright © Materials Research Society 2015 

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