Shear Band Formation in Al-2mass%Cu Single Crystals Containing ϑ Precipitates

  • Morii K.
    College of Engineering, University of Osaka Prefecture
  • Terada H.
    Graduate Student, University of Osaka Prefecture
  • Nakayama Y.
    College of Engineering, University of Osaka Prefecture

書誌事項

タイトル別名
  • Shear Band Formation in Al-2mass%Cu Single Crystals Containing ϑ Precipitates

抄録

The effect of θ precipitates and deformation at elevated temperatures on the shear band formation has been investigated in rolled single crystals of an Al-2%Cu alloy based on observations of slip bands and dislocation structures. Irrespective of heat treatments to give either a nominal solid solution or θ precipitates, shear bands were not formed in (011)[\bar100] crystals but in (211)[\bar111] crystals during rolling at room temperature. Increase in the temperature up to 473 K resulted in rather homogeneous slip and developed no shear bands even in the (211)[\bar111] crystals. A simple correlation between the shear band formation and dislocation structures was found; the shear bands occurred in the crystals in which aligned micro-bands (layered dislocation walls) evolved.

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