Hostname: page-component-76fb5796d-2lccl Total loading time: 0 Render date: 2024-04-30T01:04:24.527Z Has data issue: false hasContentIssue false
  • English
  • Français

Comparative Study of Structural and Néel Transition Temperatures in FE-MN-SI Shape-Memory Alloys

Published online by Cambridge University Press:  15 February 2011

M.I.N. da Silva ,
G.J. de Arruda ,
P.E.F. Côrtes ,
M.S. Andrade ,
R. Paniago  and
N.L. Speziali
M.I.N. da Silva
Affiliation:
Fundacao Centro Tecnológico de Minas Gerais, Belo Horizonte-MG, Brazil, ivonete@cetec.br
G.J. de Arruda
Affiliation:
Fundacao Centro Tecnológico de Minas Gerais, Belo Horizonte-MG, Brazil, ivonete@cetec.br
P.E.F. Côrtes
Affiliation:
Fundacao Centro Tecnológico de Minas Gerais, Belo Horizonte-MG, Brazil, ivonete@cetec.br
M.S. Andrade
Affiliation:
Fundacao Centro Tecnológico de Minas Gerais, Belo Horizonte-MG, Brazil, ivonete@cetec.br
R. Paniago
Affiliation:
Universidade Federal de Minas Gerais, Belo Horizonte-MG, Brazil
N.L. Speziali
Affiliation:
Universidade Federal de Minas Gerais, Belo Horizonte-MG, Brazil
Get access

Abstract

Fe-Mn-Si based alloys exhibit the shape memory effect depending on their composition. Upon cooling, these alloys undergo a martensitic transformation γ (fcc) → ε (hcp), and a magnetic transition, at the Néel temperature, from paramagnetic to antiferromagnetic ordering in the γ-phase. In this work, the structural and magnetic phase transition temperatures were determined in an Fe-27Mn-2.5Si (in weight %) shape-memory alloy, using differential scanning calorimetry, dilatometry, electrical resistivity, Mossbauer spectroscopy, and X-ray diffraction. The transition temperatures measured by the different techniques were almost the same. It was observed, by calorimetry and electrical resistivity measurements, that the magnetic transition temperature upon cooling was very close and slightly higher than that of the start of the martensitic transformation, thus promoting the stabilization of the γ-phase. Consequently, the amount of thermally induced ε-martensite was very small. Mössbauer spectroscopy and X-ray diffraction measurements showed that only 10% of ε-martensite was formed upon cooling to quite low temperatures.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 604: Symposium LL – Materials for Smart Systems III , 1999 , 227
Copyright
Copyright © Materials Research Society 2000

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

[1] Sato, A.; Chishima, E.; Soma, K.; Mori, T.. Acta Metall., 30, (1982), p. 1177.10.1016/0001-6160(82)90011-6Google Scholar
[2] Sato, A.; Chishima, E.; Yamaji, Y.; Mori, T.. Acta Metall., 32, (1984), p. 539.10.1016/0001-6160(84)90065-8Google Scholar
[3] Sato, A.; Yamaji, Y.; Mori, T.. Acta Metall., 34, (1986), p. 287.10.1016/0001-6160(86)90199-9Google Scholar
[4] Gulyaev, A.A., Journal de Physique IV, 4 (1995) C8–469.Google Scholar
[5] Jung, J., Fricke, M., Hampel, G. and Hesse, J., Hyperfine Interactions, 72 (1992), p.375.10.1007/BF02397691Google Scholar
[6] Kimball, C., Gerber, W.D., J. Appl. Phys., 34, (1963) 1046.10.1063/1.1729363Google Scholar
[7] Rabinkin, A., CALPHAD 3 (1979) 77.10.1016/0364-5916(79)90008-7Google Scholar
[8] Miodownik, A P., CALPHAD 1 (1979) 133.10.1016/0364-5916(77)90014-1Google Scholar
[9] Murakami, M., Suzuki, H., Nakamura, Y., Trans. Iron Steel Inst. Jpn., 27 (1987) B–87.Google Scholar
[10] Zuoxiang, Q., Manping, Y., Yansheng, Z., Journal of Materials Science, 131 (1996), p.2311.10.1007/BF01152939Google Scholar