|About this Abstract
||2011 TMS Annual Meeting & Exhibition
||Bulk Metallic Glasses VIII
||Shear Band Patterns in Metallic Glasses under Vickers Indentation
||Zhinan An, Yanfei Gao, Fengxiao Liu, Peter K Liaw
|On-Site Speaker (Planned)
Vickers indentation was conducted on Zr-based bulk metallic glasses and metallic glass thin films. Both semi-sphere shear bands and radial shear bands were discovered in free-bond metallic glasses, yet only radial shear bands could be seen in non-free-bond metallic glasses. The radial shear bands were generated due to in-plane shear stresses and were in agreement with the maximum shear stress direction according to our finite element analysis. While the semi-sphere shear bands were caused by out-of-plane shear stresses. Shear bands were blocked by the film/substrate. Instead of penetrating into the substrate, the radial shear bands were reflected back into the metallic glass thin film. This phenomenon was both discovered experimentally and predicted in our modeling.