Si. Wright et al., TEXTURAL AND MICROSTRUCTURAL GRADIENT EFFECTS ON THE MECHANICAL-BEHAVIOR OF A TANTALUM PLATE, Metallurgical and materials transactions. A, Physical metallurgy andmaterials science, 25(5), 1994, pp. 1025-1031
The effects of gradients in the texture and microstructure of a tantal
um plate on mechanical behavior are examined. In particular, the effec
ts of variations in grain size and texture from the surface of the pla
te to the centerline on the yield behavior and final shape of compress
ion samples are investigated. Individual lattice orientations were mea
sured on samples both before and after deformation using automatic ana
lysis of electron backscatter diffraction patterns. These data were us
ed as input to a polycrystal plasticity model based on the Taylor assu
mption of uniform strain. Results are compared from experimental and s
imulated compression tests. The effects of the texture and grain size
gradients on these results are discussed. The influence of the texture
gradient was found to be the dominating factor controlling the nonuni
form plastic response of the material. This work also demonstrates the
capability of currently available tools for characterizing inhomogene
ous microstructures and modeling the effects of variations in texture
and microstructure on mechanical behavior.