On the influence of microstructural gradients in the fatigue lifetime estimation of a railway axlePierre Baudoin, Vincent Magnier, Ahmed El Bartali, Jean-François Witz, Philippe Dufrenoy, Eric Charkaluk and François DemillyMATEC Web of Conferences, 7 (2013) 01007DOI: https://doi.org/10.1051/matecconf/20130701007