Multiple deformation twinning occurs in deformed metals and alloys under suitable conditions, resulting in the formation of twin/matrix (T/M) lamellar structures which act as precursors for strain-induced structural refinement on the nanometer scale. Four possible mechanisms for nanoscale structural refinement via T/M lamellae in various face-centered cubic metals are identified, including fragmentation of T/M lamellae, formation of secondary twins, twin-twin intersection and shear banding. The effects of processing conditions and material parameters on nanoscale twinning are analyzed. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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[tao, n. r.; lu, k.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;tao, nr (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china;nrtao@imr.ac.cn lu@imr.ac.cn
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