2.5 MFL peak-to-peak comparisons: The MFLpp signal was also measured for all samples, however this only reflected the size of the main centre peak (a further study of the shoulder peak height is currently underway). Figure 6 and Figure 7 show bottomside and topside MFLpp results respectively, for the large dent samples. In both figures, (a) represents the low flux density results and (b) the high flux density case. The two sets of data on each graph indicate
1) the pre-annealing state where the MFL signal is comprised of both geometry and stress contributions, and
2) the post annealing state where the signal is predominately geometry induced.