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Microtwins are frequently observed in face-centered-cubic (fcc) metal nanowires with low stacking fault energy. The authors have previously reported that the tensile yield strength of copper nanowires can be increased by the presence of twin boundaries. In this work simulations are carried out under both uniaxial tension and compression loading, to demonstrate that the strengthening effects are inherent...
In-situ tensile straining in a transmission electron microscope was used to investigate the role of twin plane spacing on the deformation and fracture mechanism of pure copper containing a high density of nanoscale growth twins. Real-time and post-mortem observations clearly reveal that twin plane spacing plays a key role in determining the operative deformation mechanism and therefore the subsequent...
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