2020
DOI: 10.3390/cryst11010028
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Tensile Creep Behavior of Single-Crystal High-Entropy Superalloy at Intermediate Temperature

Abstract: In this study, we investigated the creep deformation mechanism of a single-crystal high-entropy superalloy (HESA) with the spherical γ′ precipitates at 760 °C. Before the creep tests, long-term aging tests at 760 °C without load were conducted, which showed Ostwald ripening of the secondary γ′ precipitates up to 50 h. The creep tests revealed that in the range of 500 and 600 MPa at 760 °C, the creep deformation mechanism of HESA was independent of applied stress in both the primary and secondary creep regions.… Show more

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Cited by 6 publications
(4 citation statements)
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“…The authors concluded that kinetic tools and computational thermodynamics can be used to predict the precipitation processes of HESAs; however; the improvement of HESAs is dependent on the phase equilibria. Saito et al (2021) studied the tensile creep behaviour of HESAs at intermediate temperatures or turbine blades applications. For a typical flight cycle in the aerospace industry, less time is spent on the maximum thrust and more time is spent on minimal severe cruise conditions; therefore, most turbine engine components spend their service life at intermediate temperatures.…”
Section: High Entropy Superalloysmentioning
confidence: 99%
See 1 more Smart Citation
“…The authors concluded that kinetic tools and computational thermodynamics can be used to predict the precipitation processes of HESAs; however; the improvement of HESAs is dependent on the phase equilibria. Saito et al (2021) studied the tensile creep behaviour of HESAs at intermediate temperatures or turbine blades applications. For a typical flight cycle in the aerospace industry, less time is spent on the maximum thrust and more time is spent on minimal severe cruise conditions; therefore, most turbine engine components spend their service life at intermediate temperatures.…”
Section: High Entropy Superalloysmentioning
confidence: 99%
“…Saito et al (2021) studied the tensile creep behaviour of HESAs at intermediate temperatures or turbine blades applications. For a typical flight cycle in the aerospace industry, less time is spent on the maximum thrust and more time is spent on minimal severe cruise conditions; therefore, most turbine engine components spend their service life at intermediate temperatures.…”
Section: Advances In Materials Technology: High Entropy Materialsmentioning
confidence: 99%
“…A few recent CCA design concepts include the formation of a two-phase microstructure enhanced with coherent geometrically closed packed (GCP) phases (typically or ) to ensure alloy performance at elevated temperatures 3 , including improved creep properties 10 , 11 . The topologically close-packed (TCP) phases on the other hand, such as or Laves, are traditionally treated as “undesirable” in most of the alloys 1 , 8 , especially in plate-like form, as they are generally brittle and lead to deterioration of mechanical properties 12 , 13 .…”
Section: Introductionmentioning
confidence: 99%
“…T. Saito et al [1] and T. Chen et al [2] investigated creep behavior; T. Saito et al [1] focused on the deformation mechanism of a single-crystal high-entropy superalloy at intermediate temperature from theoretical and experimental aspects. T. Chen et al [2] developed a measurement method of strain-rate-dependent plasticity using a high-temperature instrumented indentation test and its computational simulations.…”
mentioning
confidence: 99%