Quantifying Dislocation Density and Recrystallization Kinetics in a Cold Sprayed Structure
June 15, 2026
a) Microstructures of the as sprayed and laser heat treated samples show the distributions of grains and recrystallizations after treatments. b) depth-resolved dislocation density distribution of the ~2-mm thick cold sprayed layers before and after treatments. c) dislocations recovery, grain growth and phase transformation of the cold sprayed coupon upon heating.
Scientific Achievement
The dislocation density and recrystallization kinetics in a laser-heated cold sprayed stainless steel 304l are revealed via the high-flux and high-resolution neutron diffractions.
Significance and Impact
The research reveals how laser heating can be used to reduce the defects and alleviate residual stress to improve structural integrity in repair of critical engineering structure.
Research Details
- The dislocation density distributions in cold sprayed samples are investigated before and after laser-heating by high spatial resolution neutron diffractions.
- The recrystallization process is revealed by in-situ neutron diffraction upon induction heating.
“Quantifying Dislocation Density and Recrystallization Kinetics in Laser-Heated Cold Sprayed SS304L,“ Journal of Thermal Spray Technology 34, 2656-2670 (2025).
https://doi.org/10.1007/s11666-025-02066-5
