where is a Poisson’s ratio. The definition of is slightly modified from the original one by replacing a ferritegrain diameter with a length of the dislocation line .is a locking parameter in the Hall-Petch law and is assumed
to equal 20.7 MPa mm1/2 based on our preliminary test. is effective surface energy and is given as 10 J/m
is critical cementite particle thickness defined as 2