7.8 - on the other side of the twin plane Recall – this...

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Alternative deformation process to slip – twinning If slip is restricted, another type of deformation mechanism may take place called twinning. It is not as common as slip. It can occur in bcc and hcp materials at low temperatures or high load rates. In twinning, shear forces produce atomic displacements such that after the displacements, atoms are located in mirror image positions
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Unformatted text preview: on the other side of the twin plane. Recall – this was the twin (grain) boundary. The displacements of the atoms are proportional to the distance from the twin plane. Like slip, twinning occurs in specific crystallographic planes and in specific crystallographic directions. (e.g. in bcc the twinning system is {112}<111> )...
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This note was uploaded on 08/10/2009 for the course ENGN 45 taught by Professor Wendy during the Spring '09 term at City College of San Francisco.

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