Aluminum Parts Fabricated by Laser-Foil-Printing Additive Manufacturing: Processing, Microstructure, and Mechanical Properties
Open Access
- 15 January 2020
- Vol. 13 (2), 414
- https://doi.org/10.3390/ma13020414
Abstract
Fabrication of dense aluminum (Al-1100) parts (>99.3% of relative density) by our recently developed laser-foil-printing (LFP) additive manufacturing method was investigated as described in this paper. This was achieved by using a laser energy density of 7.0 MW/cm2 to stabilize the melt pool formation and create sufficient penetration depth with 300 μm thickness foil. The highest yield strength (YS) and ultimate tensile strength (UTS) in the LFP-fabricated samples reached 111 ± 8 MPa and 128 ± 3 MPa, respectively, along the laser scanning direction. These samples exhibited greater tensile strength but less ductility compared to annealed Al-1100 samples. Fractographic analysis showed elongated gas pores in the tensile test samples. Strong crystallographic texturing along the solidification direction and dense subgrain boundaries in the LFP-fabricated samples were observed by using the electron backscattered diffraction (EBSD) technique.Keywords
This publication has 32 references indexed in Scilit:
- Microstructural Characterization of Laser-Deposited Al 4047 AlloyMetallurgical and Materials Transactions A, 2012
- A study of the microstructural evolution during selective laser melting of Ti–6Al–4VActa Materialia, 2010
- Pore size and fracture ductility of aluminum low pressure die castingEngineering Fracture Mechanics, 2009
- Porosity Formation and Prevention in Pulsed Laser WeldingJournal of Heat Transfer, 2006
- Effect of oxygen concentration upon the ductility of amorphous Zr57Nb5Al10Cu15.4Ni12.6Materials Science and Engineering: A, 2006
- Photopyroelectric measurement of thermal conductivity of metallic powdersJournal of Applied Physics, 2004
- Research and Progress in Laser Welding of Wrought Aluminum Alloys. I. Laser Welding ProcessesMaterials and Manufacturing Processes, 2003
- Quantification of oxide film thickness at the surface of aluminium using XPSSurface and Interface Analysis, 2002
- In-sita Observed Pore Formation During Solidification of Aluminium.ISIJ International, 2000
- Laser beam welding of low weight materials and structuresMaterials & Design (1980-2015), 1997