Effect of grain boundary misorientation on discontinuous precipitation in an AZ91 alloy

Misorientation Dependence of the Grain Boundary Energy in Magnesia

Geometric and crystallographic data obtained from a well annealed magnesia polycrystal have been used to specify the five macroscopic degrees of freedom for 4665 grain boundaries. The results indicate, that for this sample, the five parameter grain boundary character space is fully occupied. A finite series of symmetrized spherical harmonics has been used to approximate the misorientation depen...

Effect of Boundary Misorientation on Yielding Behavior of Nanostructured High

3 IMR KINKEN Research Highlights 2011 IMR KINKEN Research Highlights 201

Effect of Grain Boundary Microchemistry on IGSCC of Alloy 132 in a Simulated BWR Environment

Intergranular stress corrosion cracking (IGSCC) of Alloy 132 weld metal in light water reactor (LWR) structural components is a great concern. The microstructure of Alloy 132 is dendritic and the grain boundaries that are parallel to the direction of the dendrites growth are known to be most susceptible to cracking. In order to correlate the grain boundary microstructure to IGSCC, and in genera...

Measuring the Influence of Grain-Boundary Misorientation on Thermal Groove Geometry in Ceramic Polycrystals

We have used electron backscattered diffraction patterns to determine the misorientation of 201 adjacent pairs of grains in a magnesia polycrystal. The width and depth of the thermal grooves formed by these same grain boundaries were also measured by atomic force microscopy (AFM). By simulating the errors associated with the AFM observations and comparing our observations to existing data for m...

EFFECT OF GRAIN-BOUNDARY STRUCTURE ON STRESS CORROSION CRACKING IN Cu-Al ALLOY BICRYSTALS