Primary glide direction

It may be apparent from studying the perovskite structure that it is likely to exhibit quite anisotropic plastic (hardness) behavior, and it does. The primary glide plane is (110) and the glide direction is (1-10). 

Movement of dislocations is a primary mechanism for plastic deformation. A dislocation s motion is impeded when they encounter obstacles, causing the stress required to continue the deformation process to increase. Grain boundaries are one of the obstacles that can impede dislocation glide, so the number of grain boundaries along a slip direction can be expected to influence the strength of a material. In the early 1950s, two researchers, Hall (1951) and Petch (1953),... 

Of the 12 slip systems possessed by the CCP stmcture, five are independent, which satisfies the von Mises criterion. For this reason, and because of the multitude of active slip systems in polycrystalline CCP metals, they are the most ductile. Hexagonal close-packed metals contain just one close-packed layer, the (0 0 0 1) basal plane, and three distinct close-packed directions in this plane [I I 2 0], [2 I I 0], [I 2 I 0] as shown in Figure lO.Vh. Thus, there are only three easy glide primary slip systems in HCP metals, and only two of these are independent. Hence, HCP metals tend to have low... 

It is interesting to note that the plane and direction of the glide mechanism correspond to the primary slip system for NaCl [302], Indeed,... 

As with many of the arthritic conditions, the primary dysfunction of the wrist and hand occur with the secondary motions more than the primary motions. Some dysfunctions of the carpal joints occur involving multiple joints. One of the most typical of the carpal dysfunctions involves restriction of glide of the lunate bone. It tends to have a preferential glide into the ventral direction and can contribute to the narrowing of the space of the carpal tunnel. The dysfunctions of... 

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