Abstract
Tensile tests of virtually “pure” FeO, γ -Fe3O4, and α-Fe2O3 were performed at 600–1250°C at strain rates of 2.0×10−3–6.7×10−5 s−1 under controlled gas atmospheres. Mechanical properties and deformation/fracture behavior were investigated. For α-Fe2O3, brittle fracture resulted at 1150–1250°C and the fracture strain was below 4.0% at a strain rate of 2.0×10−4 s−1. γ -Fe3O4 deformed plastically above 800°C. Steady-state deformation was indicated at 1200°C; elongation of 110% was obtained. Plastic deformation observed at 800 to 1100°C was considered to result from dislocation glide. Using TEM, the Burgers vector of dislocations observed in deformed γ -Fe3O4 was determined to be <110>, its slip system was estimated to be {111}<110>. FeO deformed plastically above 700°C. Steady-state deformation became predominant above 1000°C. Elongation of 160% was obtained at 1200°C. Strain rates of FeO at 1000°C and 1200°C were proportional to the fourth power of the saturated stress, indicating that plastic deformation was affected by dislocation climb.
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REFERENCES
J. D. Mackenzie and C. E. Birchenall, Corrosion 13, 783 (1957).
R. F. Tylecote, J. Iron Steel Inst., pp. 135 (1960).
B. Ilschner, B. Reppich, and E. Riecke, Discussions Faraday Soc. 38, 243 (1964).
G. Vagnard and J. Manenc, C. R. Acad. Sci. 104 (1962).
B. Reppich, Phys. Stat. Solidi 20, 69 (1967).
D. Bruce and P. Hancock, J. Inst. Met. 97, 148 (1969).
M. Shütze, Mater. Sci. Technol. 6, 32 (1990).
M. F. Ashby, Acta Metall. 20, 887 (1972).
J. Robertson and M. I. Manning, Mater. Sci. Technol. 6, 81 (1990).
H. J. Frost and M. F. Ashby, Deformation-Mechanism Maps (Pergamon Press, Oxford, 1982).
N. B. Pilling and R. E. Bedworth, J. Inst. Met. 29, 529 (1923).
Y. Hidaka, T. Anraku, and N. Otsuka, Mater. Sci. Forum, accepted for publication.
Y.Hidaka, T. Anraku, and N. Otsuka, J. Inst. Met. 64, 291 (2000) (in Japanese).
M. F. Ashby and D. M. R. Gandhi, Acta Metall. 27, 699 (1979).
J. Stringer, Corros. Sci. 10, 513 (1970).
K. Nii (ed.), High Temperature Corrosion of Metals and Alloys (Japan Society of Corrosion Engineering, Maruzen, 1982), p. 61 (in Japanese).
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Hidaka, Y., Anraku, T. & Otsuka, N. Tensile Deformation of Iron Oxides at 600–1250°C. Oxidation of Metals 58, 469–485 (2002). https://doi.org/10.1023/A:1020568905309
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DOI: https://doi.org/10.1023/A:1020568905309