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- W2751488792 abstract "Abstract Ni-base single-crystal turbine blades are exposed to a combination of high temperatures and high stresses during their service life in high-pressure turbines of aero engines or stationary gas turbines. This unavoidably leads to various internal microstructural changes such as rafting and the formation of cavities. This study introduces a creep-rejuvenation-creep test cycle using one miniature Ni-base single-crystal creep specimen. A novel hot isostatic press providing high quenching rates was applied to rejuvenate the damaged microstructure of the specimen after the first high-temperature creep degradation before the same specimen was repeatedly creep-tested under the same initial creep conditions. After rejuvenating, microstructural results obtained from high-resolution microscopy prove that the creep cavities were closed, dislocation densities were re-set, and the original but now slightly finer γ/γ′-microstructure was restored without any recrystallization. The subsequent creep test of the rejuvenated specimen demonstrated that the proposed rejuvenation procedure in this work is a suitable method to reproduce the initial creep behavior and to thus prolong the lifetime of an already crept Ni-base single-crystal specimen." @default.
- W2751488792 created "2017-09-15" @default.
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- W2751488792 date "2017-11-01" @default.
- W2751488792 modified "2023-10-18" @default.
- W2751488792 title "Rejuvenation of creep resistance of a Ni-base single-crystal superalloy by hot isostatic pressing" @default.
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- W2751488792 doi "https://doi.org/10.1016/j.matdes.2017.08.059" @default.
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