Intragranular three-dimensional stress tensor fields in plastically deformed polycrystals.

摘要: The failure of polycrystalline materials used in infrastructure and transportation can be catastrophic. Multiscale modeling, which requires multiscale measurements internal stress fields, is the key to predicting deformation alloys. We determined three-dimensional intragranular tensor fields plastically deformed bulk steel using a high-energy x-ray microbeam. observed local stresses that deviated greatly from grain-averaged exceeded macroscopic tensile strength. Even under smaller than uniform elongation, were highly triaxial states, cannot stresses. ability determine facilitate understanding prediction through modeling.