Plastic deformation of CuAlMn shape-memory alloys
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CuAlMn alloys transforming below room temperature were cold rolled after quenching up to 93% reduction. Alloys deformed only 10% were already completely martensitic and did not show reverse transformation to β1 upon heating. With increasing deformation, refinement of martensitic plates occurred due to repeated internal twinning and injection of new orientation variants. This was accompanied by decreasing size of ordered domains down to that of shortrange ordered microdomains at 93% reduction. Deformation bands appearing at 60% reduction consisted of extremely small grains, giving an electron diffraction pattern resembling that of an amorphous structure.
KeywordsPolymer Diffraction Pattern Plastic Deformation Electron Diffraction Material Processing
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