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An electron backscattered diffraction technique has been used to investigate crystallographic features of a superplastic coarse-grained Fe-27 at% Al alloy. Alloy samples studied have been tensile tested in a temperature range between 600 and 800 o C in air under an initial strain rate of 1x10 -4 s -1 . As a result of dynamic recovery and recrystallization, the grain...
The effect of environment on the yield strength of boron-free and boron-doped Fe-40Al was considered. Special attention was given to the role of excess thermal vacancies. It was found that samples given a vacancy-relieving heat treatment had a 12% lower yield strength when tested in air than when tested in vacuum. This was attributed to an environmental softening effect. However, samples with a large...
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