Mechanical stress evaluation by neutrons and synchrotron radiation VIII : Selected, peer reviewed papers from the 8th International Conference on Mechanical Stress Evaluation by Neutrons and Synchrotron Radiation (MECA SENS VIII 2015), September 28 - October 02, 2015, Grenoble, France / edited by Thomas Holden, Tamas Ungar, Thomas Buslaps and Thilo Pirling.