|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Advanced Characterization Techniques for Quantifying and Modeling Deformation Mechanisms
||Measuring Residual Stresses in Boron Carbide in TEM
||Luoning Ma, Paul Rottmann, Kelvin Xie, Kevin Hemker
|On-Site Speaker (Planned)
Ceramics are generally brittle and usually exhibit low fracture toughness. One effective way to improve ceramic toughness is by introducing compressive residual stresses. However, to measure residual stresses using conventional techniques such neutron diffraction is time consuming and costly. In this work, we carried out nanoscale strain mapping in TEM by acquiring and comparing nano-beam precession electron diffraction patterns. The effect of grain boundary misorientation, grain boundary morphology, inter-granular second phases and inter-granular second phases on the residual stresses that form upon cooling in a commercial boron carbide was investigated. The new insights we have gained here can be useful for guiding fracture modeling and predicting failure of boron carbide.
||Planned: Supplemental Proceedings volume