| Plastic Deformation, Grain Boundary Bulging, and Static Recovery in OCP. |
Click image to enlarge (~1MB) |
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This set of images illustrates the consequences of rapid dextral shearing of OCP, at a shear strain rate of about 5% per minute, at room temperature. |
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| 33. Strain-free OCP grains containing approximately spherical, vapor-filled cavities. |
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| 34.
After a local shear strain of the order of 0.5, the cavities in the
central, upper part of the picture have become elliptical. They seem to
be acting at least approximately as strain ellipses. However, other
cavities in the picture are not particularly elliptical, for example
the four bright ones in the grey grain around (17,30). You can use the
changing relative positions of these four cavities (between this image
and the previous one) to see whether the local strain here is in fact
lower. See how the grain boundary through (50,58), for example, is beginning to become wavy. |
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| 35. More strain at the top of the field of view, and more elliptical cavities. |
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| 36. Notice the subgrains forming near grain boundaries, for example the white subgrain at (50,12). |
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