Abstract
The temperature at which antiphase boundary (APB) tubes anneal out of lightly-strained Ni-rich Ni3Al thin foils has been measured via in-situ heating in a transmission electron microscope to be ∼530 °C. Given this new information, the wealth of literature on the mechanical properties of Ni3Al across the entire temperature regime of the yield stress anomaly, ∼25–800 °C, is re-evaluated to consider the impact of APB tubes. Contrary to previous theoretical predications, APB tubes do not appear to affect the strength of Ni3Al.
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