7.5 - A combination of families of crystallographic planes...

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Slip is more difficult as the individual atomic step distances are increased. Hence, slip is more difficult on a low- atomic-density plane than on a high- atomic-density plane. In general, the micromechanical mechanism of slip – dislocation motion – will occur in high-atomic-density planes and in high-atomic-density directions.
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Unformatted text preview: A combination of families of crystallographic planes and directions corresponding to dislocation motion is referred to as a slip system . For example the fcc slip system is {111} <110>. This is 12 systems. The hcp slip system has only has 3 systems. Hence, fcc materials are more ductile than hcp materials...
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