INVESTIGADORES
DAMONTE Laura Cristina
artículos
Título:
Phase Transformations in FeMn Alloys Induced by ball milling
Autor/es:
COTES, SONIA; CABRERA, A.F.; L. C. DAMONTE; MERCADER, R.; DESIMONI J.
Revista:
HYPERFINE INTERACTIONS
Editorial:
Kluwer
Referencias:
Año: 2002 vol. 141 p. 409 - 412
ISSN:
0304-3843
Resumen:
We have studied the dependence on the milling time of the amounts of metastable fcc
and hcp phases produced by ball milling on Fe13.7 wt% Mn alloys by Mössbauer spectroscopy and
X-ray diffraction. The relative proportions of γ -Fe(Mn) fcc and ε-Fe(Mn) hcp increase with milling
times up to 9 h and decline afterwards. A random solid solution of Mn in the α-Fe matrix is found
for milling times up to 15 h. Mn segregation is observed after 25 h. The evolution of the relative
percentages suggests that ball milling brings about processes that on the one hand induce the fcc/hcp
martensitic transformation, and on the other favour transformations towards the phases dictated by
the thermodynamic phase diagram.γ -Fe(Mn) fcc and ε-Fe(Mn) hcp increase with milling
times up to 9 h and decline afterwards. A random solid solution of Mn in the α-Fe matrix is found
for milling times up to 15 h. Mn segregation is observed after 25 h. The evolution of the relative
percentages suggests that ball milling brings about processes that on the one hand induce the fcc/hcp
martensitic transformation, and on the other favour transformations towards the phases dictated by
the thermodynamic phase diagram.α-Fe matrix is found
for milling times up to 15 h. Mn segregation is observed after 25 h. The evolution of the relative
percentages suggests that ball milling brings about processes that on the one hand induce the fcc/hcp
martensitic transformation, and on the other favour transformations towards the phases dictated by
the thermodynamic phase diagram.