International Conference on Residual Stresses pp 273-278 | Cite as
Simultaneous Determination of Residual Stresses in a Thin Alumina Layer Grown by Oxidation on a NiCoCralY Alloy and in This Alloy
Abstract
With a proper choice of experimental conditions, we demonstrate that the sin2 ψ method can be applied to determine the residual stresses existing at room temperature in a thin alumina layer and in the subjacent zone of a nickel-base alloy on which it has grown. This method has been applied on a 5 pm thick alumina scale formed by oxidation in air, during 300 hours at 1100°C, on a NiCo21Cr24Al14Y.06 alloy. The residual stresses in the alumina layer are highly compressive and their magnitude corresponds to the calculated value of the thermal stresses, whereas the residual stress level in the metallic alloy remains low.
Keywords
Residual Stress Oxide Scale Bragg Angle High Temperature Oxidation Alumina LayerPreview
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References
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