Simultaneous creep and oxidation of an Fe–5AL alloy at 973–1073 K
Authors: Rolls, R.; Madueke, C. S.
Source: Materials Science and Technology, Volume 1, Number 2, February 1985 , pp. 152-155(4)
Publisher: Maney Publishing
Abstract:Studies of the simultaneous creep and oxidation of an Fe-5Al alloy at constant stresses of 12 and 16 MN m−2 in the temperature range 973-1073 K have shown that the steady-state creep obeys a power law. The stress exponent n was found to lie between 5 and 7. The apparent activation energy for creep was in the range 77–397 kJ mol−1 and depended on the oxygen partial pressure Po2 of the test environment. The oxidation strengthening (steady-state creep rate ε decreasing) was found for an applied stress of 16 MNm−2 for Po2 in the range 10−7 to 1·013 × 105 Pa. At 12 MN m−2, strengthening occurred only in the range 973–1023 K; weakening was found at 1073 K. The primary causes of strengthening are believed to be the mechanical constraint of strongly adherent scales and internal oxide-dislocation interactions.
Document Type: Research Article
Publication date: 1985-02-01
Authors wishing to cite fast track papers should give the journal name and the article DOI. This will enable reference linking via CrossRef and allow forward and backward citation tracking systems to associate the fast track citation with the final journal reference.Materials Science and Technology is the successor of two previous titles, for which digitised archives are available: Metal Science (Vols. 1—17; 1967—84) and Metals Technology (Vols. 1—11; 1974—84).
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