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

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.
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Publication Date:
OSTI Identifier:
DOE Contract Number:
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Alloys and Compounds; Journal Volume: 581
Sponsoring Org:
USDOE Advanced Research Projects Agency - Energy (ARPA-E)
Country of Publication:
United States