Hall-Petch Relationship of a TWIP Steel
The grain size dependence of the tensile properties of a TWIP steel has been determined for a wide range of grain sizes obtained by grain growth after complete recrystallization of cold rolled material. The near-linear stress-strain behaviour typical of either TWIP steels or other materials that deform by twinning has been observed, the work hardening rate being larger for the smaller grain sizes. The Hall-Petch slope increases as a function of strain, from 350 MPa μm1/2 for the yield stress to 630 MPa μm1/2 for the maximum uniform strain in the tensile tests, ε 0.40. Profuse twinning is observed in deformed specimens by means of FIB-ISE.
Nicolás de la Rosa Fox
F. de las Cuevas et al., "Hall-Petch Relationship of a TWIP Steel", Key Engineering Materials, Vol. 423, pp. 147-152, 2010