A sequential pre-cracking procedure to measure the mode-I fracture toughness of ultra pure bulk metallic glasses

Cédric Bernard (1) , Vincent Keryvin (1) , Véronique Doquet (2) , Sovanara Hin (1) , Yoshihiko Yokoyama (3)

1 IRDL - Institut de Recherche Dupuy de Lôme
2 LMS - Laboratoire de mécanique des solides
3 IMR - Institute for Materials research

A dedicated fatigue pre-cracking method, performed successively under mode II and mode I, has been set up to initiate and propagate a crack close to the notch plane, which is particularly difficult to achieve using pure mode I loading on some ultra pure bulk metallic glasses, free from oxygen contamination. This method, was applied to a pure Zr55Cu30Al10Ni5 (at.%) amorphous alloy, and allowed successful pre-cracking and reliable measurement of the apparent mode I fracture toughness.

Mots clés: Fracture; Toughness; Bulk metallic glasses; Protocol

Domaines: Mécanique des matériaux [physics.class-ph]

Cédric Bernard, Vincent Keryvin, Véronique Doquet, Sovanara Hin, Yoshihiko Yokoyama. A sequential pre-cracking procedure to measure the mode-I fracture toughness of ultra pure bulk metallic glasses. Scripta Materialia, 2017, 141, pp.58-61. ⟨10.1016/j.scriptamat.2017.07.027⟩. ⟨hal-01574266⟩