This dataset is linked to the following paper which is published at Materials Science and Engineering: A Characterisation of strain localisation processes during fatigue crack initiation and early crack propagation by SEM-DIC in an advanced disc alloy R. Jiang*, F. Pierron, S. Octaviani, P.A.S. Reed Materials Research Group, Faculty of Engineering and the Environment, University of Southampton, Highfield, Southampton, SO17 1BJ, UK *Corresponding author. Tel: +44 (0)23 80594438; Fax: +44 (0)23 80593016; Email: Rong.Jiang@soton.ac.uk "SEM-DIC noise assessment.rar" in this dataset contains the raw data of the noise assessment presented in Fig. 3 in the aforementioned paper. "LSHR_without FIB notch_raw images.rar" and "LSHR_without FIB notch_stitched images.rar" in this dataset contain the raw data of the SEM-DIC results presetned in Figs. 4-6 in the aforementioned paper. LSHR_with FIB notch_stitched images.rar" in this dataset contians the raw data of the SEM-DIC results presented in Figs. 7-10 in the aforementioned paper.