|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Dynamic Behavior of Materials VIII
||Characterization of Defect Motion at High Strain Rate In Situ inside a TEM
||Thomas Voisin, Michael Grapes, Tian Li, Jonathan P. Ligda, Nicholas J. Lorenzo, Brian E. Schuster, Melissa K. Santala, Yong Zhang, Xiaolong Ma, Geoffrey H. Campbell, Timothy P. Weihs
|On-Site Speaker (Planned)
Dynamic behavior of metals has been widely studied experimentally using many different techniques at various spatial and time scales. However, there is no experiment available to characterize in situ defect nucleation, interactions and propagation through the microstructure with nanometer and nanosecond resolution. We use the Dynamic TEM at the Lawrence Livermore National Laboratory, the only TEM able to record 9 pictures with delays between each picture as short as 50ns. We also designed and built a new TEM holder capable of deforming samples at strain rates ranging from quasi-static up to 4x103/s. We will present the latest results on copper and magnesium alloys specimens. In addition, we conducted in situ TEM tensile test at quasistatic strain rate using identical specimens to identify the impact of strain rate. Work conducted at LLNL was performed under the auspices of the U.S. Department of Energy, by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344.
||Planned: Supplemental Proceedings volume