The effect of austenitizing time on martensite morphologies and magnetic properties of martensite in Fe–24.5%Ni–4.5%Si alloy
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The effect of austenitizing time on the formation of martensite in Fe–24.5%Ni–4.5%Si alloy has been studied by means of transmission electronmicroscope (TEM), scanning electronmicroscope (SEM) and Mössbauer spectroscopy technique. TEM and SEM observations revealed that the martensite morphology was found to be closely dependent on the austenitizing time. The orientation relationship between austenite and thermally induced martensite was found as the Kurdjumov-Sachs type. The volume fraction changes of martensite and austenite phases, the hyperfine magnetic field of martensite phase and isomery shift values have been determined by Mössbauer spectroscopy. The Mössbauer study also revealed that the martensite volume fractions increased with increasing austenite grain size.
KeywordsAustenite Martensite Habit Plane Select Area Diffraction Pattern Lath Martensite
One of the authors (H.G) is grateful to Dr. E. Guler with experimental work.
- 3.Umemoto M, Tamura I (1982) In: Delaey L, Chandrasekaran M (eds) Proceedings of the international conference on martensitic transformations, 1982 (ICOMAT 82). Belgium, p C4-523Google Scholar
- 8.Zeng DC, Tan YH, Qiao GW, Chuang YC (1994) Z Metallkunde 85:203Google Scholar
- 15.Gautier E, Zhang J, Zhang X, Hu TR (1994) In: Johnson WC, Howe JM, Laughin DE, Soffa WA (eds) Proceedings of the international conference on solid solid phase transformations, July 17–22, 1994, The Minerals, Metals and Materials Society, Pennsylvania, p 847Google Scholar
- 17.Wang S, Wen YH, Zhang X (1993) In: Wayman CM, Perkins J (eds) Proceedings of the international conference on martensitic transformations, 1992 (ICOMAT 92). Monterey Institute for Advanced Studies, Monterey, California, p 281Google Scholar