TY - JOUR
T1 - Continuous transition of deformation mode in Fe-30Mn-5Si-lAl alloy
AU - Koyama, Motomichi
AU - Sawaguchi, Takahiro
AU - Ogawa, Kazuyuki
AU - Kikuchi, Takehiko
AU - Murakami, Masato
N1 - Copyright:
Copyright 2012 Elsevier B.V., All rights reserved.
PY - 2009/3
Y1 - 2009/3
N2 - Deformation modes at various stages of plastic deformation have been investigated at identical locations in an Fe-30Mn-5Si-1A1 (mass%) alloy specimen, which exhibits a good shape memory effect associated with FCC (7) →HCP (ε) martensitic transformation and relatively high ductility caused by deformation twinning. The surface relief caused by γ→ε martensitic transformation, deformation twinning and slip band formation has been analyzed by measuring surface tilt angles corresponding to each deformation mode by atomic force microscopy. Although ε-martensitic transformation is the dominant deformation mode in the early deformation stage, a part of the E-martensite plates changes to deformation twins with the increase of deformation volume. Slip deformation also occurs inside the same region under excessive strain. The continuous transition of these deformation modes also occurs in the other grains in the same order: ε martensite→deformation twins→slip bands.
AB - Deformation modes at various stages of plastic deformation have been investigated at identical locations in an Fe-30Mn-5Si-1A1 (mass%) alloy specimen, which exhibits a good shape memory effect associated with FCC (7) →HCP (ε) martensitic transformation and relatively high ductility caused by deformation twinning. The surface relief caused by γ→ε martensitic transformation, deformation twinning and slip band formation has been analyzed by measuring surface tilt angles corresponding to each deformation mode by atomic force microscopy. Although ε-martensitic transformation is the dominant deformation mode in the early deformation stage, a part of the E-martensite plates changes to deformation twins with the increase of deformation volume. Slip deformation also occurs inside the same region under excessive strain. The continuous transition of these deformation modes also occurs in the other grains in the same order: ε martensite→deformation twins→slip bands.
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U2 - 10.2320/jinstmet.73.174
DO - 10.2320/jinstmet.73.174
M3 - Article
AN - SCOPUS:66149139153
SN - 0021-4876
VL - 73
SP - 174
EP - 179
JO - Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
JF - Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
IS - 3
ER -