Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5456545 | Materials Science and Engineering: A | 2016 | 15 Pages |
Abstract
The effects of microstructure on the creep behavior in a new developed Ni-Co base superalloy were investigated and two microstructures were obtained by different heat treatments. The results show that the air cooling microstructure, consisting of large spherical γⲠand small spherical γâ², resulted in a slow creep rate and small creep strain. While the slow cooling microstructure, consisting of large flowery γⲠand small spherical γâ², resulted in a fast creep rate and large creep strain. The γ channel and γⲠmorphology are two main factors for these differences, the large γ channel and flowery γⲠin the slow cooling microstructure causing the dislocations slip easily in the γ matrix and cut into the γⲠprecipitates with low stress.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
L. Xu, C.Q. Sun, C.Y. Cui, C. Zhang,