Relaxation of Phase Specific Elastic Strains/stresses during Deformation of Al/Si–MMCs at Elevated Temperatures

Abstract

Thermal and mechanical loading induces phase specific strains/stresses in metal matrix composites (MMCs). At elevated temperature part of the phase specific stresses relax. The relaxation of the phase specific residual stresses is determined by in situ experiments using white high-energy synchrotron radiation (HESR). They reveal that time- resolved strain measurements are possible and that short-time phenomena can be accessed using white HESR. The elastic strain relaxation behavior is similar for all lattice planes accessed. The influence of the temperature on the characteristic relaxation time is determined.