The influence of stress on the oxidation of a Ni-based superalloy

Abstract

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Effect of Tensile Stress on the Oxide Properties of a Nickel-Based Alloy 600 in Simulated PWR Secondary Water

“…As a result, the diffusion of chromium would be enhanced, resulting in a decrease in the chromium content of the inner layer under tensile stress. Similarly, a significant increase in the depth of oxidation penetration was found in the highly stressed regions of a nickel-based RR1000 alloy that was exposed to fatigue loading at 750 • C in air [72], indicating that oxygen diffusion was enhanced by tensile stress. In addition, rapid dissolution of the alloy elements under tensile stress would result in the formation of defective oxide films.…”

High -Temperature short term / in situ oxidation behaviour of Haynes-230 at 1200 °C

“…The tensile strain is higher at 800°C than at 1200°C. This could be related to stress relaxation on the alloy surface at high temperatures [12].…”

The effect of near-surface plastic deformation on the hot corrosion and high temperature corrosion-fatigue response of a nickel-based superalloy

“…The alloy consists of a γ matrix with an average grain size of 8µm and γ' precipitates Ni3 (Al, Ti, Ta), as shown in Figure 1. The chemical composition is shown in Table 1 1 -%wt composition of RR1000 [9] Two specimen types were provided for this study; flat plate samples for static hot corrosion testing (10x10x5mm) and round bar specimens with a 9mm diameter, for dynamic high temperature corrosion-fatigue testing, shown in Figure 2a and 2b. 330H, all other peening variables remained fixed.…”