Microstructural characterization of polycrystalline materials by synchrotron Xrays
Microstructural characterization of polycrystalline materials by synchrotron X-rays Leyun WANG 1 ; Meimei LI 1 ; Jonathan ALMER 2 ; Thomas BIELER 3 ; Rozaliya BARABASH 4 ; 1. Nuclear Engineering Division, Argonne National Laboratory, Lemont, IL 60439, USA ; 2. X-ray Science Division, Argonne National Laboratory, Lemont, IL 60439, USA ; 3. Department of Chemical Engineering & Materials Science, Michigan State University, East Lansing, MI 48824, USA ; 4. Materials Science & Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA ; Fig. 9 In situ tensile tests of Grade 92 ferriticmartensitic steel at 20°C and 650°C by simultaneous WAXSSAXS. Top row: macroscopic stress–strain curves showed a significant strength reduction from 20°C to 650°C. Second row: evolution of von Mises stress in Fe black, M 23 C 6 red and Nb. C, N blue with strain. Third row: evolution of diffraction peak broadening in Fe black, M 23 C 6 red and Nb. C, N blue with strain. Bottom row: volume fraction of voids as a function of strain was estimated from SAXS profiles. A strong correlation between void and necking high X-ray transmission was observed. The increase of void volume with strain at the necking center can be simulated by a mathematical model [ 76 ]. Frontiers of Materials Science, 2013, 7(2), 156 -169. Doi: 10. 1007/s 11706 -013 -0201 -0
- Slides: 1