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The A/D type twin boundary in a Cu-Zn-Al shape memory alloy appears curved under TEM and shows impularly sermted steps under HREM Crystallogmphic analysis shows that the macroscopic curve results hem non-selfaccommodation of the boundary, the deviation from exact twin orientation and a pwtrential orientation for lower boundary enerpy.
The A / D type twin boundary in a Cu-Zn-Al shape memory alloy appears curved under TEM and shows imparentlyly sermted steps under HREM Crystallogmphic analysis shows that the macroscopic curve results hem non-selfaccommodation of the boundary, the deviation from an exact twin orientation and a pwtrential orientation for lower boundary enerpy.