The Hall-Petch Relationship in Interstitial-free Steel Processed by Equal Channel Angular Extrusion

Authors

Azdiar A. Gazder, University of WollongongFollow
Christopher HJ Davies, Monash University
E V. Pereloma, University of WollongongFollow

RIS ID

31507

Publication Details

Gazder, A. A., Davies, C. HJ. & Pereloma, E. V. (2009). The Hall-Petch Relationship in Interstitial-free Steel Processed by Equal Channel Angular Extrusion. In A. Haldar, D. Bhattacharjee & S. Suwas (Eds.), Proceedings of the International Conference on Microstructure and Texture in Steels and Other Materials (pp. 451-456). London: Springer.

Abstract

The Hall-Petch relationship was studied in interstitial-free steel subjected to Φ = 90° Equal Channel Angular Extrusion for up to N = 8 passes via route B_C processing. The composite equation indicates that although low-angle grain boundaries provide the maximum strengthening up to N = 8 passes, the contribution from high-angle boundaries also increases with greater pass number. Alternatively, the evolution of boundary misorientation in as-ECAE microstructures and its effect on mechanical properties up to N = 3 passes is also understood by using a misorientation scaling factor within the original Hall-Petch equation.