Abstract
Cu-13Al-4Mn (wt%) shape memory alloys were fabricated by additive manufacturing and exhibits good shape memory effect. Corresponding microstructural evolution was revealed under the compressive condition. Results indicate that stress-induced twin-related transformation played an important role in deformation process. At the initial deformation stage, the reorientation of (−1–1) twin was activated. With the pre strain increased, detwinning and crossed deformation twin occurred, which accompanied by massive stacking faults, Lomer-Cottrell (L-C) locks, resulted in the formation of irrecoverable strain.
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