Interactions between orientation and strain distributions and self healing of creep damage in Fe-Au-W ternary alloys and computationally des

To understand the interrelation between strain localization & damage formation in relation to local self healing kinetics, we will characterize the distribution of local strains and orientations with a link to the distribution of creep cavities and healing precipitates as a function of creep time in a ternary model alloy and a computationally designed self healing high temperature steel. A multi imaging modality uniquely available on ID11 will be used to investigate samples after interrupted creep testing for different fractions of normal lifetimes: 1) distribution of creep cavities (sign of damage) and connected precipitates (sign of healing) by phase contrast tomography; 2) orientation and strain mapping by diffraction contrast tomography, topo-tomography and scanning 3D x-ray diffraction microscopy at multiple length scales. Results to be obtained are expected to provide more detailed guidelines for better tailoring the self healing capability of future creep-resistant steels.