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Title: Effect of Mn on Microstructure and Mechanical Properties of Al-4Ni Alloy
Authors: Fang, J
Dong, X
Ji, S
Keywords: aluminium alloys;intermetallics;Mechanical properties;microstructure;thermal stability
Issue Date: 15-Oct-2021
Publisher: Springer Science and Business Media LLC
Citation: Fang, J., Dong, X. and Ji, S. (2021) 'Effect of Mn on Microstructure and Mechanical Properties of Al-4Ni Alloy', JOM, 73 (12), pp. 3819-3826. doi: 10.1007/s11837-021-04908-3.
Abstract: Copyright © 2021 The Author(s). The application of aluminum alloys at elevated temperatures has been attractive for decades, and Al-Ni-based alloys have recently been recognized as potential candidates. The effect of Mn on Al-4Ni alloy has been investigated in this work. Addition of Mn transformed the eutectics from Al3Ni/a-Al to Al9(Ni,Mn)2/a-Al phases. Mn also improved the tensile strength at both 25°C and 250°C. The yield strength at 25°C increased from 48 MPa to 92 MPa with 1.87% Mn and then to 117 MPa with 3.77% Mn. At 250°C, the yield strength increased from 35 MPa to 82 MPa with 1.87% Mn and then to 101 MPa with 3.77% Mn. The alloys with Mn also showed less strength loss than Al-4Ni alloy at 250°C. The eutectic Al9(Ni,Mn)2 phase showed good thermal stability. No coarsening was observed after 2000 h at 250°C.
ISSN: 1047-4838
Appears in Collections:Brunel Centre for Advanced Solidification Technology (BCAST)

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