کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1577883 | 1514811 | 2012 | 7 صفحه PDF | دانلود رایگان |
Nanoindentation experiments were conducted on a Ni+ ion-irradiated Zr-based bulk metallic glass (BMG). The irradiation was carried out using 2.5, 5, 10 and 15 MeV ions and a flux of ∼1016 ions/cm2. Post mortem imaging of the indents reveals a transition in the deformation mechanism of the irradiated regions from heterogeneous shear banding to homogeneous flow. Additionally, the load–displacement curves exhibit a transition from serrated to continuous flow with increasing severity of irradiation damage. The stress–strain response obtained from micro-pillar compression experiments complements the indentation response exhibiting a decrease in the flow stress and an ‘apparent’ strain hardening at the lowest irradiation damage investigated, which is not observed in the as-cast alloy.
► Nanoindentation of Zr-based bulk metallic glass ion irradiated to various damage levels.
► Transition from heterogeneous to homogeneous plastic deformation mechanism.
► Multiple shear band intersection during compression of micro-pillars.
► Irradiation is a novel technique to induce plasticity in amorphous alloys.
Journal: Materials Science and Engineering: A - Volume 532, 15 January 2012, Pages 407–413