Journal of Materials Science

, Volume 43, Issue 9, pp 3112–3117 | Cite as

The effect of Si and microstructure evolution on the thermal expansion properties of Fe–42Ni–Si alloy strips

  • M. K. Kim
  • J. Namkung
  • Y. S. Ahn


An alloying element of 0–1.5 wt.% Si was added to an Fe–42%Ni system, and alloy strips were fabricated using a melt drag casting process. The effects of the Si and annealing treatments on the thermal expansion properties of Fe–42Ni alloy were investigated. The addition of Si enlarged the coexisting temperature region of the solid–liquid phase and reduced the melting point, which improved the formability of the alloy strip. An alloy containing 0.6 wt.% Si had a lower thermal expansion coefficient than any other alloy in the temperature range from 20 to 350 °C. The grain size increased with the rolling reduction ratio and annealing temperature, which caused an increase in magnetostriction and consequently a decrease in the thermal expansion coefficient of the strip. The alloy strip containing 1.5 wt.% Si had a higher thermal expansion coefficient than the alloy containing 0.6 wt.% Si because of grain refining caused by the precipitation of Ni3Fe.


Thermal Expansion Coefficient Cast Strip Invar Alloy Alloy Strip Thermal Expansion Behavior 


  1. 1.
    Kim SK (2002) J Kor Inst Met Mater 40:419Google Scholar
  2. 2.
    International Iron and Steel Institute (1993) Near net shape casting. BrusselsGoogle Scholar
  3. 3.
    Mostefa LB, Saindrenan G, Solignac MP, Colin JP (1991) Acta Mater 39:3111CrossRefGoogle Scholar
  4. 4.
    Cacciamani G, De Keyzer J, Ferro R, Klotz UE, Lacaze J, Wollants P (2006) Intermetallics 14:1312CrossRefGoogle Scholar
  5. 5.
    Kocheisen K (1972) Giessereiforschung 24:133Google Scholar
  6. 6.
    Goman’kov VI, Puzei IM, Loshmanov AA, Mal’tzev YI (1969) Phys Met Metallogr 28:77Google Scholar
  7. 7.
    Gehrmann B, Acet M, Herper HC, Wassermann EF, Pepperhoff W (1999) Phys Stat Sol (b) 214:175CrossRefGoogle Scholar
  8. 8.
    Kim CD, Matsui M, Chikazumi S (1978) J Phys Soc Japan 44:1152CrossRefGoogle Scholar
  9. 9.
    Khmelevskyi S, Mohn P (2004) Phys Rev B 69:14CrossRefGoogle Scholar
  10. 10.
    Lambret E, Saindrenan G (1996) In: Wittenauer J (ed) Proc. Int. Symposium on the Invar Effect, Paolo Alto, California, pp 39–62Google Scholar
  11. 11.
    Bozorth BM (1986) Ferromagnetism. D. Van Nostrand, New York, p 138Google Scholar
  12. 12.
    Kim YH, Choi SJ (1990) J Kor Inst Met Mater 28:6Google Scholar

Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  1. 1.School of Materials Science & EngineeringPukyong National UniversityBusanKorea
  2. 2.New Materials & Component Research CenterResearch Institute of Industrial Science & TechnologyPohangKorea

Personalised recommendations