Tensile behaviors and deformation mechanisms of a nickel-base single crystal superalloy at different temperatures

Influence of deformation temperature on recrystallization in a Ni-based single crystal superalloy

“…Twinning by growth accidents only occurs at the front of migrating RX boundaries, and cannot explain the highest propensity for RX at a deformation temperature of 980°C. The emergence of stacking faults is related to the dislocation energy of 〈011〉 and 〈112〉, the misfit energy between the γ and γ′ phases, and the stacking fault energy [17]. Fig.…”

Deformation mechanisms of a nickel-based single-crystal superalloy during low-cycle fatigue at different temperatures

“…On the other hand, notably the SFs in the c matrix also contributed to the work-hardening behavior. These SFs can prevent the movement of the following dislocations effectively [16]. During the LCF tests, the experimental alloy showed obvious tensile and compressive asymmetry.…”

“…Although the SFE of pure Ni is as high as 200 mJ Á m À2 [15], the SFE values of the c and c 0 phases significantly decreased with the addition of various elements (e.g. Co, Re and Ru) [15,16]. Thus, it is useful to study the deformation mechanisms of SX superalloys with a low SFE.…”

Plastic deformation mechanisms in a new Ni‐base single crystal superalloy at room temperature

“…Such a fault configuration was also observed by Milligan & Antolovich () in the SC superalloy PWA 1480 after tensile deformation at 760°C and by Wang et al . () in a Ru‐containing Ni‐base SC superalloy at 760°C. The formation process of these faults has been discussed in great detail by our group (Zhang et al ., ,b), who showed that the configuration is achieved by the dissociation of an individual a /2<101> dislocation at the γ/γ′ interfaces and the formation of one a /3<121> partial which moves into the γ′ precipitate.…”