Effects of Annealing on Microstructure and Mechanical Properties of Bulk Nanocrystalline Fe₃Al Based Alloy Prepared by Aluminothermic Reaction

Abstract:

The effects of annealing on microstructure and mechanical properties of bulk nanocrystalline Fe₃Al based alloy with 10 wt. % Ni prepared by aluminothermic reaction have been investigated. It was found that crystal structure of the alloy did not change after annealing at 600 and 800 °C, while it changed to ordered B₂ and nanocrystalline grains orientations became random after annealing at 1000 °C. Average grain sizes of the alloy changed a little after annealing at different temperatures. The alloy after annealing had a large plastic deformation in compression at room temperature and the alloy annealed at 800 °C had the highest compressive yield strength of 1351 MPa. The alloy without annealing had much lower flow stress and good creep property in compression at 800 and 1000°C.

• Periodical: Materials Science Forum (Volume 688)
• Pages: 57-61
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.688.57
• Online since: June 2011
• Authors: Pei Qing La, Xue Feng Lu, Yang Yang, Ya Ping Bai, Yu Peng Wei
• Keywords: Aluminothermic Reaction, Annealing, Mechanical Property, Microstructure, Nanocrystalline

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DOI: 10.1002/ange.200685538