|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Bulk Metallic Glasses XIV
||A Comprehensive Study of the Deformation Mechanism of Amorphous CuZr/Nanocrystalline Cu Nanolaminates via Integrated Experiments and Computations
||Bin Gan, William Yi Wang, Bin Tang, Jun Wang, Hongchao Kou, Maosen Fu, Jinshan Li
|On-Site Speaker (Planned)
Incorporation of crystalline phases into BMG matrix is an effective method to arrest and deflect the propagation path of shear bands and ensure a safe usage of BMG materials. In the present work, nanolaminates consisting of alternating amorphous CuZr and nanocrystalline Cu are selected to investigate the interaction of shear bands with nanocrystallines. Micro-compression technique is utilized to reveal the propagation speed of shear band in amorphous CuZr, the deformation of nanocrystalline Cu, and the chemical intermixing as well as stress-induced crystallization of amorphous phase. The comprehensive study via transmission electron microscopy, atom probe tomography and ab initio molecular dynamics simulations of the deformed micropillars reveals that the grain rotation in the crystalline portion and non-diffusive crystallization in the amorphous layer are responsible for slowing down the movements of shear bands. The underlying mechanism of serrated flow of the nanolaminates is also elucidated in the present work.
||Planned: Supplemental Proceedings volume