An improved moire interferometry was used to record simultaneously both the vertical and horizontal displacements associated with stable crack growth in an uniaxially loaded 5052-H32 aluminum, single edge notched specimens. For stable crack growth up to 2 mm, the vertical displacement field showed the dominance of the HRR field. HRR field was detected in the horizontal displacement only at the initial stage of loading. The far and near field J- integrals were path independent during this incremental crack extension. These results and previous results involving 2024-0 and 2024-T3 aluminum specimens indicate that J-characterization of a crack, is not valid for such ductile materials in this specimen configuration.