Influence of Plastic Deformation during ECAP on Precipitation Temperature of γ″ in IN 718 Alloy
The formation behavior of γ″(Ni3Nb) precipitates in IN 718 alloy before and after ECAP(equal channel angular pressing) was investigated by microstructural observation and the hardness test. For the alloy examined before ECAP, the γ″ precipitates were formed only after aging treatment at 720, whereas after ECAP, the γ″ precipitates were formed at the aging temperatures of both 600 and 720. 600 is normally too low a temperature for γ″ precipitates to be formed in commercial IN 718 alloy, however, they were able to be formed due to severe plastic deformation by ECAP. It was found that the ECAP process changed the formation behavior of the γ″ precipitates in IN 718 alloy.
Jang Hyun Sung, Chan Gyu Lee, Yong Zoo You, Young Kook Lee and Jae Young Kim
I. H. Kim and S.I. Kwun, "Influence of Plastic Deformation during ECAP on Precipitation Temperature of γ″ in IN 718 Alloy", Solid State Phenomena, Vol. 118, pp. 431-436, 2006