Ductile vs Brittle Fracture Behaviors in Metallic Glasses
Huajian Gao (Brown University)
Prager Medal Symposium in honor of George Weng: Micromechanics, Composites and Multifunctional Materials
Wed 9:00 - 10:30
MacMillan 117
The rapid development of synthesis and characterization of materials as well as unprecedented computational power have brought forth a new era of materials research in which experiments, modeling and simulations are performed side by side to probe the unique mechanical properties of nanostructured materials. Here we report a series of recent studies on ductile vs brittle fracture behaviors and related deformation mechanisms in metallic glasses [1-3]. The discussions will be organized around the current understandings based on existing experimental and theoretical efforts, as well as the outstanding questions that require further studies in the future. REFERENCES 1. P. Murali, T.F. Guo, Y.W. Zhang, R. Narasimhan, Y. Li and H.J. Gao, “Atomic Scale Fluctuations Govern Brittle Fracture and Cavitation Behavior in Metallic Glasses,” 2011, Physical Review Letters, Vol. 107(21), Art. No. 215501. 2. P. Murali, Y.W. Zhang and H.J. Gao, “On the Characteristic Length Scales Associated with Plastic Deformation in Metallic Glasses,” 2012, Applied Physics Letters, Vol. 100(20), Art. No. 201901. 3. I. Singh, T.F. Guo, P. Murali, R. Narasimhan, Y.W. Zhang and H.J. Gao, “Cavitation in materials with distributed weak zones: Implications on the origin of brittle fracture in metallic glasses,” 2013, JMPS, to appear.