Fcc-hcp transformation-related internal friction in Fe –Mn alloys
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A. K. De
Abstract
The ε↔γ reversible transformation has been studied in Fe-14 wt.% Mn and Fe-21 wt.% Mn alloys which are known to exhibit a weak shape memory effect. The internal friction changes and the associated elastic modulus changes were measured using the high frequency (40 kHz) composite oscillator technique in the temperature range 20 – 350 °C in which the ε↔γ transformation occurs. The strain-induced amplitude dependent internal friction was measured in order to evaluate changes in the dislocation structure that occur during the transformations and to identify the transformation mechanism involved. The study revealed that the propagation of the ε/γ interface boundary during the ε↔γ transformation is a thermally activated relaxation process obeying the Debye relaxation equation. The internal friction data were used to determine the activation energy of the process responsible for the martensitic transformation. The damping peak is observed at temperatures where both phases coexist and is due to the motion of the ε/γ interface.
The ε/γ interface consists of Shockley partial dislocations moving in groups and causing a minimal macroscopic strain. The ε/γ interface-related dislocation motion is, therefore, the cause of the internal friction peak. The internal friction is associated with a step-like change in the elastic modulus which is due to the ε/γ interface related relaxation and the difference in the modulus of the ε and γ phases.
References
1 Enami, K.; Nagasawa, A.; Nenno, S.; Scripta Metall. 9 (1975) 941.10.1016/0036-9748(75)90549-9Search in Google Scholar
2 Tsuzaki, K.; Ikegami, M.; Tomota, Y.; Maki, T.: ISIJ Int. No. 8 (1990) 666.10.2355/isijinternational.30.666Search in Google Scholar
3 Cotes, S.; Sade, M.; Fernández Guillermet A.: Metall. Mater. Trans. A 26 (1995) 1957.10.1007/BF02670667Search in Google Scholar
4 Lee, Y.-K.; Choi, C.-S.: Metall. Mater. Trans. A 31 (2000) 2735.10.1007/BF02830332Search in Google Scholar
5 Sato, A.; Chishima, E.; Soma, K.; Mori, T.: Acta Metall., 28 (1982) 1177.10.1016/0001-6160(82)90011-6Search in Google Scholar
6 Putaux, J.-L.; Chevalier, J.-P.: Acta Mater. 44 (1996) 1701.10.1016/1359-6454(95)00268-5Search in Google Scholar
7 Maki, T., in: K. Otsuka, C.M. Wayman (eds.), Shape Memory Materials, Cambridge University Press (1988) 117.Search in Google Scholar
8 Pace, N.G.; Saunders G.A.: Phil. Mag., 73 (1970) 73.10.1080/14786437008228152Search in Google Scholar
9 Jordan, L.; Masse, M.; Collier, J.-Y.; Bouquet, G.: J. Alloys Comp., 211/212 (1994) 204.10.1016/0925-8388(94)90483-9Search in Google Scholar
10 Bidaux, J.-E.; Schaller, R.; Benoit, W.: J. Physique, Coll. C8, No. 12, 48 (1987) 477.Search in Google Scholar
11 Yoshida, I.; Otsuka, H.: J. Alloys Comp. 211/212 (1994) 208.10.1016/0925-8388(94)90484-7Search in Google Scholar
12 Pérez-Sáez, R.B.; Nó, M.L.; San Juan, J.: J. Alloys Comp. 211/212 (1994) 212.10.1016/0925-8388(94)90485-5Search in Google Scholar
13 Lee, Y.-K.: Metall. Mater. Trans. A 32 (2001) 229.10.1007/s11661-001-0253-0Search in Google Scholar
14 Pan, Z.; Hosbons, R.R.: Proc. 39 Mechanical Working and Steel Processing Conference, Iron and Steel Society, Indianapolis, Indiana, XXXV (1997) 241.Search in Google Scholar
15 Lenkkeri, J.T.; Levoska, J.: Phil. Mag. A 48 (1983) 749.10.1080/01418618308236541Search in Google Scholar
16 Cabañas, N.; De, A.K.; Akdut, N.; De Cooman, B.C.: Proc. 43 Mechanical Working and Steel Processing Conference, Iron and Steel Society, Charlotte, North Carolina, October 28–31, 2001, XXXIX (2001) 813.Search in Google Scholar
17 Spinner, S.; Rozner, A.G.: J. Acoust. Soc. Amer. 40 (1966) 1009.10.1121/1.1910180Search in Google Scholar
18 De Morton, M.E.: J. Appl. Phys., 40 (1969) 208.10.1063/1.1657032Search in Google Scholar
19 Granato, A.; Lücke, K.: J. Appl. Phys. 27 (1956) 583.10.1063/1.1722436Search in Google Scholar
20 De, A.K.; De Blauwe, K.; Vandeputte, S.; De Cooman, B.C.: J. Alloys Comp. 310 (2000) 405.10.1016/S0925-8388(00)00973-7Search in Google Scholar
21 Nowick, S.; Berry, B.S.: Anelastic Relaxation in Crystalline Solids, Academic Press, New York (1972) 427.Search in Google Scholar
22 Dieter, G.E.: Mechanical Metallurgy McGraw-Hill London (1988) 135.Search in Google Scholar
23 Ilczuk, J.; Delaey, L.; Van Humbeeck, J.: J. Physique, Coll. C8, No. 12, 48 (1987) 553.Search in Google Scholar
24 Hwang, C.; Lei, C.Y.; Suzuki, T.; Wuttig, M.: J. De Physique, Coll. C8, No. 12, 48 (1987) 547.Search in Google Scholar
25 Lord, E.; Beshers, D.N.: Acta Metall., 14 (1966) 1659.10.1016/0001-6160(66)90018-6Search in Google Scholar
© 2002 Carl Hanser Verlag, München
Articles in the same Issue
- Frontmatter
- Articles/Aufsätze
- Strain rate dependence of the deformation mechanisms in a fully lamellar γ-TiAl-based alloy
- Experimental and thermodynamic assessment of the Fe –Gd–Zr system
- Phase diagram of the Fe –Co –Ti system at 1073 K
- Copper concentration inside Guinier-Preston I zones formed in an Al –Cu alloy
- Identification of precipitates in 6013 aluminum alloy (Al –Mg –Si –Cu)
- Redistribution of phosphorus and carbon in steel weldments
- Microstructure and compressive properties of in situ synthesized TiC/Ti composites
- Effect of Al on the glass forming ability of Zr–Ni –Cu–Al alloys
- Fcc-hcp transformation-related internal friction in Fe –Mn alloys
- High-temperature stress and strain partitioning in duplex stainless steel
- Load sequence effects in the high cycle fatigue of two ferrite-pearlite microalloyed steels
- Characterization of intermetallic compounds formed during the interfacial reactions of liquid Sn and Sn– 58Bi solders with Ni substrates
- Notifications/Mitteilungen
- Personal/Personelles
Articles in the same Issue
- Frontmatter
- Articles/Aufsätze
- Strain rate dependence of the deformation mechanisms in a fully lamellar γ-TiAl-based alloy
- Experimental and thermodynamic assessment of the Fe –Gd–Zr system
- Phase diagram of the Fe –Co –Ti system at 1073 K
- Copper concentration inside Guinier-Preston I zones formed in an Al –Cu alloy
- Identification of precipitates in 6013 aluminum alloy (Al –Mg –Si –Cu)
- Redistribution of phosphorus and carbon in steel weldments
- Microstructure and compressive properties of in situ synthesized TiC/Ti composites
- Effect of Al on the glass forming ability of Zr–Ni –Cu–Al alloys
- Fcc-hcp transformation-related internal friction in Fe –Mn alloys
- High-temperature stress and strain partitioning in duplex stainless steel
- Load sequence effects in the high cycle fatigue of two ferrite-pearlite microalloyed steels
- Characterization of intermetallic compounds formed during the interfacial reactions of liquid Sn and Sn– 58Bi solders with Ni substrates
- Notifications/Mitteilungen
- Personal/Personelles
