Characterization of Al–Fe–V–Si heat-resistant aluminum alloy components fabricated by selective laser melting. Issue 10 (4th May 2015)

• Record Type: Journal Article
• Authors: Sun, Shaobo; Zheng, Lijing; Liu, Yingying; Liu, Jinhui; Zhang, Hu
• Is Part Of: Journal of materials research. Volume 30:Issue 10(2015)
• Page Start: 1661
• Page End: 1669
• Publication Date: 2015-05-04
• Subjects: powder processing, -- microstructure, -- hardness; Materials -- Research -- Periodicals; 620.1105
• DOI: 10.1557/jmr.2015.110
• Languages: English
• ISSNs: 0884-2914

Abstract

Abstract: 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)3 Si particles (10–70 nm) distributed homogeneously in the α-Al matrix, while the rectangle-like Al m Fe-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 .