Metallurgical and Materials Transactions B

, Volume 1, Issue 5, pp 1333–1335 | Cite as

Deformation twinning as a mode of energy accommodation

  • R. J. Wasilewski
Mechanical Behaviour


The conditions necessary for mechanical twin nucleation are considered. It is concluded that a high elastic strain energy accumulation must precede twin nucleation, and that twin formation provides an efficient means of excess energy accommodation. It is suggested that the significance of the resolved shear stresses present is limited to the slip deformation, which must precede, accompany, and follow twin formation in real crystals. The resultant shear deformation is not inherent in twinning itself, but originates in the associated slip. In the absence of slip, in a perfect crystal, twins can form by atom shuffles requiring no overall shear.


Perfect Crystal Elastic Strain Energy Slip Dislocation Slip Flow Real Crystal 
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Copyright information

© The Minerals, Metals & Materials Society - ASM International - The Materials Information Society 1970

Authors and Affiliations

  • R. J. Wasilewski
    • 1
  1. 1.Department of Process and Physical MetallurgyColumbus Laboratories, Battelle Memorial InstituteColumbus

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