采用一种测定氧化膜生长应力的双面氧化弯曲方法，测量了Fe-23Cr-5Al(Fe-22.6Cr-4.42Al-0.21Ti,wt%)合金在1000℃空气中氧化形成的Al2O3膜的平均生长应力，研究了氧化膜应力释放机制。Al2O3膜的平均生长应力随膜厚增大而减小，其大小从-1GPa数量级变化到-100MPa数量级。基体合金和Al2O3膜在1000℃时均发生蠕变。合金氧化一定时间后于真空保温退火，发现0。0.039μm厚的氧化膜应力下降速率比0.30μm厚的氧化膜快6.9-18.4倍.
The average growth stresses in Al2O3 scales formed on Fe-23Cr-5Al alloy during oxidation at 1000℃,in air have been measured by using a new deflection technique.The relaxation of oxide stress has also been studied.The average growth stresses in Al2O3 scales decreased with thickening of the scales,their values were over the range of -1000～-100MPa.The stresses in the substrate alloy were much lower,in the order of 1MPa.Both the substrate alloy and alumina scales might creep at 1000℃.During the annealing of the oxidized specimen,the rate of the stress decrease with time was 6.9～18.4times higher for the scale of 0.039μm than that for the scale of 0.30μm.
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