Application of CGP-cross route process for microstructure refinement and mechanical properties improvement in steel sheets

- An improved cross route was introduced for CGP as a SPD method.
- CGP-CR was successfully performed up to two passes on the steel sheets.
- The strain is ∼2.32 in each passes of CGP-CR process.
- The strength and hardness can be increased up to about 2 times after CGP-CR.
- The average cell/subgraine size of the steel sheet is 225 nm after 2 CGP-CR passes.