Structural modifications in a Mn54Al43C3 melt-spun alloy induced by mechanical milling and subsequent annealing investigated by atom probe tomography

Journal Article · Wed Dec 25 00:00:00 EST 2013 · Journal of Alloys and Compounds

DOI:https://doi.org/10.1016/j.jallcom.2013.07.002· OSTI ID:1211055

Le Breton, JM; Bran, J; Folcke, E; Lucis, M; Larde, R; Jean, M; Shield, JE

The structural changes upon milling and subsequent annealing of a Mn54Al43C3 alloy containing the intermetallic tetragonal L1(0) MnAl phase (tau phase) as the major phase were investigated by X-ray diffraction and atom probe tomography. The analyses show that milling the starting powder for 10 h leads to the nanostructuration of the sample. The milled sample is partly oxidised and contains both non oxidised Mn60 +/- 5Al40 +/- 5 regions and oxidised regions. Annealing the powder for 1 h at 500 degrees C leads to enrichment in Al of the oxidised regions, and to the phase transformation of the non-oxidised regions into a nano-structured beta-Mn-like phase with a composition close to Mn3Al2. (C) 2013 Elsevier B. V. All rights reserved.

• Sponsoring Organization: USDOE Advanced Research Projects Agency - Energy (ARPA-E)
• DOE Contract Number: 0472-1537
• OSTI ID: 1211055
• Journal Information: Journal of Alloys and Compounds, Vol. 581; ISSN 0925-8388
• Country of Publication: United States
• Language: English