|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Bulk Metallic Glasses XV
||Improvement of Plasticity of Bulk Metallic Glasses
by Addition of a Crystalline Phase
||Sandrine Cardinal, Jean-Marc Pelletier, Guo Qiang Xie, Jichao Qiao
|On-Site Speaker (Planned)
At room temperature the majority of bulk metallic glasses present no plasticity. This constitutes a major handicap for applications in the mechanical field. To overcome this disadvantage, various methods can be investigated: (i) by modifying the chemical composition (Ii) By formation of in-situ composites by quenching (Iii) By making ex-situ composites by adding a second ductile phase, followed by a powder sintering operation. This last solution has been chosen in the present work.
The following main parameters are investigated (i) the chemical composition, (ii) the volume fraction and (iii) the size of the crystalline phase. Addition of a second phase induces a decrease in hardness, an increase or a decrease in Young modulus (depending on the reinforcing particles), a decrease in the stress to fracture but a very significant increase in plasticity. Observation of fracture surfaces evidences the positive effect of the second phase.
||Planned: Supplemental Proceedings volume