Revealing dislocation evolution in a nickel-based superalloy during tensile deformation by neutron diffraction

Yan, Z.*; Tan, Q.*; Gao, Y.*; Rong, Y.*; Qin, H.*; Bi, Z.*; Gong, W.   ; Harjo, S.   ; Wang, Y.-D.*

Yan, Z.*; Tan, Q.*; Gao, Y.*; Rong, Y.*; Qin, H.*; Bi, Z.*; Gong, W.; Harjo, S.; Wang, Y.-D.*

The dislocation structure evolution in the superalloy was studied by in-situ neutron diffraction tensile tests and line profile analysis. The proportion of screw-type dislocations increased in both fine and coarse ' structures, and dislocations were rearranged towards high-energy structures with weak dipole character, especially in the fine structure, due to its enhanced slip planarity.