A tomographic TEM study of tension-compression asymmetry response of pyramidal dislocations in a deformed Zr-2.5Nb alloy

作者：Long Fei^*; Kacher Josh; Yao Zhongwen; Daymond Mark R

来源：Scripta Materialia, 2018, 153: 94-98.

DOI：10.1016/j.scriptamat.2018.04.043

• Dislocation structure
• Three-dimensional tomography
• Zirconium alloys
• TEM

Plastic deformation induced pyramidal < c + a > dislocations in a Zr-2.5Nb alloy have been investigated by electron tomography in the transmission electron microscope. The {10-(1) over bar1} 1st order pyramidal planes were determined to be the primary slip plane, with the {11 (2) over bar2} 2nd order pyramidal planes acting as a secondary slip system. The slip behavior showed asymmetrical response with loading direction, characterized by restricted planar slip in < c > axis compressive loaded grains and frequent cross slip in < c > axis tensile loaded grains.

• 出版日期2018-8