Exceptional creep resistance of a directionally solidified superalloy: temperature-dependent evolution of microstructure and dislocations
Year: 2025
Type: article
Abstract: This study systematically analyzed the microstructure, grain boundary, and dislocation evolution of a novel directionally solidified superalloy with excellent creep resistance under different conditions and the alloy outperformed first-generation single-crystal superalloys in creep resistance. Experimental results revealed that higher temperatures inhibited the broadening of grain boundary serrations while reducing the degree of topological inversion and delaying the widening of γ channels. Dislocation behavior analysis showed that lower temperature promoted the formation of a superdislocation network, which effectively pinned the motion of superdislocations, reducing the creep rate during the secondary creep stage and delaying the transition to tertiary creep.
Source: Materials Research Letters
Institution: Zhejiang University
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,459
Award: G1671603397
OpenAlex ID: W4411344000