It is believed that the failure mode of metal nanowires under tensile loading is the result of the nucleation and propagation of dislocations. Such failure modes can be slip, partial slip or twinning and therefore they are regarded as local deformation. Here we provide numerical and theoretical evidences to show that global deformation is another predominant failure mode of nanowires under tens...

Plastic flow evolution was investigated for various metals and alloys, which differed in chemical bond and crystal lattice type (BCC/FCC/HCP), structural state (single-crystal/polycrystalline) and deformation mechanisms (dislocation glide/twinning). On the base of conclusive evidence it is attempted to explain the phenomenon of plastic flow localization by invoking a fundamental principle of qu...

Highly alloyed austenitic stainless steels are promising candidates to replace more expensive nickel-based alloys within the energy-producing industry. The present study investigates the deformation mechanisms by microstructural characterization, mechanical properties and stress–strain response of three commercial austenitic stainless steels and two commercial nickel-based alloys using uniaxial...

in this study, the effect of tensile test temperature (148 to 673 k) on the microstructural evolutions and the mechanicalproperties of high manganese twinning induced plasticity (twip) steel with the chemical composition of fe-31mn-3al-3si (wt. %) was investigated. xrd, sem and tem were used to study the microstructural evolutions.stacking fault energy (sfe) of the alloy was also calculated by ...

We present atomistic simulations of the tensile and compressive loading of single crystal facecentered cubic (FCC) nanowires with h1 0 0i and h1 1 0i orientations to study the propensity of the nanowires to deform via twinning or slip. By studying the deformation characteristics of three FCC materials with disparate stacking fault energies (gold, copper and nickel), we find that the deformation...

In this study, the texture evolutions of two Mg materials during tension are explored. In-situ X-ray synchrotron and Visco-Plastic Self-Consistent (VPSC) modeling employed to investigate different deformation modes between pure Mg–15Gd (wt.%) alloy. These with a strong extrusion show large slip/twinning activity behaviors tensile deformation. The basal ?a? slip has highest contribution initial ...