Under the effect of repeated loading cycles, metals eventually break down due to fatigue. This failure originates in the so-called “microcracks”, which are responsible for their fragilization. Steel is a particularly important metal, ubiquitous in our daily lives, and therefore it becomes necessary to understand the mechanisms of fragilization due to microcracks.
 Using advanced experimental techniques, such as electron diffraction and transmission electron microscopy (TEM), in this work we have studied the nucleation of microcracks during fatigue cycles. Our conclusions will help in the fabrication of stronger and more resistant steel.

M.N. Batista, , M.C. Marinelli, S. Hereñú, I. Alvarez-Armas
International Journal of Fatigue, Volume 72, March 2015, Pages 75–79