Enhanced thermal stability of the τ-phase in MnAl-C alloys with Ni additions
Feng L, Nielsch K, Woodcock TG (2021)
Publication Type: Journal article
Publication year: 2021
Journal
Book Volume: 871
Article Number: 159554
DOI: 10.1016/j.jallcom.2021.159554
Abstract
Alloys with compositions (Mn53Al45C2)100−xNix where x = 0, 0.6, 1.5, 2, 4 and 6 were produced, and the microstructure, magnetic properties and thermal stability of the thermodynamically metastable τ-phase, i.e., its resistance to decomposition into the equilibrium phases, were investigated. With x = 0.6 or 1.5, the τ-phase has greater stability than that in ternary alloy (x = 0): after heat treating the homogenised alloys for 7 days at 700 °C, the estimated remaining volume fractions of the τ-phase are 0.35, 0.85 and 0.91 for x = 0, 0.6 and 1.5, respectively. A hot deformed sample of the alloy with x = 0.6 showed less decomposition of τ-phase and smaller recrystallised grain size compared to the alloy with x = 0 in the same state. The solubility limit of Ni in the τ-phase with Mn:Al = 1.18 and approx. 2 at% C addition at 700 °C is below 0.6 at%, however, the solubility of Ni in the ε-phase with the same composition at 1100 °C is in the range 1.5–2 at%.
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How to cite
APA:
Feng, L., Nielsch, K., & Woodcock, T.G. (2021). Enhanced thermal stability of the τ-phase in MnAl-C alloys with Ni additions. Journal of Alloys and Compounds, 871. https://doi.org/10.1016/j.jallcom.2021.159554
MLA:
Feng, Le, Kornelius Nielsch, and Thomas George Woodcock. "Enhanced thermal stability of the τ-phase in MnAl-C alloys with Ni additions." Journal of Alloys and Compounds 871 (2021).
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