PT Journal AU Ueda, T Helfen, L Morgeneyer, TF TI In situ laminography study of three-dimensional individual void shape evolution at crack initiation and comparison with Gurson-Tvergaard-Needleman- type simulations SO Acta Materialia PY 2014 BP 254 EP 270 VL 78 DI 10.1016/j.actamat.2014.06.029 LA english ER