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

作者：Bernard C; Keryvin V^*; Doquet V; Hin S; Yokoyama Y

来源：Scripta Materialia, 2017, 141: 58-61.

DOI：10.1016/j.scriptamat.2017.07.027

• Fracture
• Toughness
• Bulk metallic glasses
• Protocol

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.

• 出版日期2017-12