Authors: Z M Jiao Z H Wang M Y Chu Y S Wang H J Yang J W Qiao
Publish Date: 2016/05/18
Volume: 122, Issue: 6, Pages: 596-
Abstract
Quasistatic and dynamic deformation behaviors of an in situ dendritereinforced metallic glass matrix composite Ti56Zr18V10Cu4Be12 were investigated Upon quasistatic compression the composite exhibits distinguished work hardening accompanied by the ultimate strength of 1290 MPa and the plasticity of 20 The improved plasticity is attributed to the multiplication of shear bands within the glass matrix and pileups of dislocations within the dendrites Upon dynamic compression the stable plastic flow prevails and the yielding stress increases with the strain rate The macroscopic plasticity decreases considerably since the shear bands cannot be effectively hindered by dendrites with deteriorated toughness The dendritedominated mechanism results in the positive strainrate sensitivity and the Cowper–Symonds model is employed to depict the strainrate dependency of yielding strengthJW Q would like to acknowledge the financial support of National Natural Science Foundation of China No 51371122 the Program for the Innovative Talents of Higher Learning Institutions of Shanxi 2013 and the Youth Natural Science Foundation of Shanxi Province China No 2015021005 HJ Y would like to acknowledge the financial support from the National Natural Science Foundation of China No 51401141 and the Youth Science Foundation of Shanxi Province China No 20140210173 ZH W would like to acknowledge the National Natural Science Foundation of China No 11390362
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