Nanotwins in nanocrystalline Mg–Alalloys: an insight from high- resolutionTEM and molecular dynamics simulation
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چکیده
Nanotwins in nanocrystalline Mg–Alalloys: an insight from high-resolutionTEM and molecular dynamics simulation Report Title Twinning in hexagonal close-packed Mg alloys has been reported to be unfavorable when the grain size is reduced below a couple of microns and suppressed at the nanoscale. Using high-resolution transmission electron microscopy, we present evidence of nanotwins (<1 nm) in nanocrystalline Mg – Al alloys processed by cryomilling. The commonly observed twinning modes for coarse-grained Mg are identi ? ed and supported with atomistic molecular dynamics simulations. The speci ? c thermomechanical conditions offered by cryomilling facilitate the generation of deformation twins that are not observed with conventional deformation processing methods. Nanotwins in nanocrystalline Mg–Alalloys: an insight from high-resolutionTEM and molecular dynamics simulation Approved for public release; distribution is unlimited. 57244.6-EG REPORT DOCUMENTATION PAGE (SF298) (Continuation Sheet) Continuation for Block 13
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