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In present work, transformation hysteresis and shape memory effect of an ultrafine-grained Ti44Ni47Nb9 alloy processed by ECAP were studied. After deformation, the ECAPed sample showed a much wider transformation hysteresis than the initial sample due to the enlarged strength mismatch between matrix and β-Nb phase. The shape memory effect and its cycling stability of the ECAPed sample were obviously...
Microstructure, martensitic transformation and mechanical properties of an ultrafine-grained Ti 44 Ni 47 Nb 9 shape memory alloy processed by equal channel angular pressing were investigated. The as-ECAP processed sample is characterized by an inhomogeneous and refined microstructure. In β-Nb phase-rich region, the grains of matrix are elongated with high density dislocations...
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