The Synergetic Effect of Rhenium and Ruthenium on the Long-Term Creep Strength of Single Crystals of Third- and Fourth-Generation Nickel-Based Superalloys

Светлов, И. Л.; Petrushin, N. V.; Epishin, Alexander; Elyutin, E. S.

doi:10.1134/s0031918x22080130

Cited by 3 publications

(1 citation statement)

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“…They also exhibit excellent compositional compatibility and structural stability, making them widely used in the turbine blades of advanced aviation engines. During service, turbine blades are subjected to creep damage primarily due to the combined effects of thermal and centrifugal stresses [6][7][8][9]. Therefore, investigating the creep resistance of single crystal alloys is of paramount importance [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

High temperature creep fracture behavior of nickel-base single crystal superalloys

Liang,

Wu,

Kai

et al. 2023

Preprint

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This study investigated the creep performance, fracture characteristics, and creep mechanisms of the nickel-base single crystal superalloy DD406 under conditions of 1100°C and 140MPa. The results indicate that the alloy exhibited a creep life of 104.5 hours and a strain of 33.58%. The creep curve exhibited three distinct stages: initial (deceleration), steady-state, and accelerated creep. The fracture surface was characterized by dimples and tearing edges, with no apparent slip planes. Internal to the fracture, oxidation products and recrystallized structures were observed, and the internal pores exhibited elongated shapes oriented perpendicular to the stress axis. Furthermore, analysis of the creep rate-time curve revealed three sub-stages within the initial (deceleration) creep stage, where the creep rate decreased initially, followed by an increase and subsequent decrease with time.

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