Line profile analyses of a martensitic steel during continuous and stepwise tensile deformations
Abstract
Dislocation characteristics in an as-quenched 22SiMn2TiB martensitic steel during tensile deformation were monitored by in-situ time-of-flight neutron diffraction combined with the Convolutional Multiple Whole Profile fitting analysis. Two loading conditions, continuous and stepwise followed by unloading, were adopted in the experiments. The diffraction patterns both in the loading (axial) and the transversal directions were measured simultaneously. The dislocation densities obtained from the experiments behaved differently in two loading conditions and in two measured directions, respectively. The different behaviour was mainly due to the increase of intergranular strains with the increase of deformation, and the profiles measured in the axial direction in the loading condition of stepwise followed by unloading gave most reliable dislocation characteristics among the profiles measured in other conditions.
- Publication:
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Journal of Physics Conference Series
- Pub Date:
- September 2016
- DOI:
- 10.1088/1742-6596/746/1/012044
- Bibcode:
- 2016JPhCS.746a2044K