Article ID Journal Published Year Pages File Type
5455242 Materials Science and Engineering: A 2017 6 Pages PDF
Abstract
The tensile tests were conducted to investigate the plastic deformation behavior of GH4169 alloy with in-situ electric-pulse current (EPC) at 800 °C, and mechanisms of EPC on plastic deformation during different stage were discussed. The results show that in-situ EPC induces the decreasing of flow stress and the improving of plasticity compared with that without EPC. The flow stress instantaneously increases/decreases without any delay with removing/recovering EPC during deformation. It is found that the thermal vibration of atoms enhances leading to decreasing of Peierls stress with in-situ EPC, which is the essential factor on flow stress decrease. Although, with in-situ EPC, the γ′′ phases are induced to precipitate and then grow up, resulting in changing dislocation motion mode with γ′′ phase.
Related Topics
Physical Sciences and Engineering Materials Science Materials Science (General)
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