Comparison between crystal slip and twinning can be made in aspects like defect type, change in crystal axis, stress requirement, visibility and occurrence threshold value of stress.
|1||Crystal slip is a line defect.||Twinning is a surface defect grain boundary defect.|
|2||During slip, all atoms in a block move the same distance.||During twinning, the atoms in each successive plane in a block move through different distances proportional to their distance from the twinning plane.|
|3||Slip is commonly observed in Body-centered Cubic (BCC) and Face Centered Cubic (FCC) metals.||Twinning is commonly observed in Hexagonal Close Packing (HCP) metals.|
|4||After the slip, the crystal axis remains the same.||After twinning, the crystal axis is deformed.|
|5||The slipped crystal lattice has the same orientation.||The twinned crystal lattice is the minor image of the original lattice.|
|6||The stress required for slip is comparatively low.||The stress required for twinning is comparatively more.|
|7||The stress necessary to propagate slip is usually higher than the stress required to start slip.||The stress necessary to propagate twinning is lesser than that required starting it.|
|8||Slip can be seen as thin lines when viewed under a microscope.||Twinning can be seen as broad lines when viewed under a microscope.|
|9||A threshold value of stress called critical resolved shear stress is required for slipping to occur.||For twinning to occur, no such threshold value of stress is required.|
For twinning to occur, no such threshold valve of stress is required.
I guess you meant “value”
Thanks for the comparison. It was really helpful.
Thanks for point out.