Mechanical Properties of Nano-phase Metals (Tensile test)

tensile test nanophase Aluminum (sintered)

We model tensile testing of nano-phase Al (Al modelled by an EAM potential described in: Phase Transitions 75, 265 (2002), Atomistic modeling of diffusion in Aluminum by S. Grabowski, K. Kadau, and P. Entel.) by either sintering from spherical nano-particles or setting up by a Voronoi construction.
Different crystallographic oriented grains (red) are separated by grain boundaries or pores (yellow). Under tensile testing different modes of plasticity such as grain rotation and grain-boundary movements are observed. In addition to that and in contrast to other materials like Cu, No, and Pd (see Literature) crack propagation along the grain-boundaries at high strains (around 10 percent depending on grain size) is observed. As in the case of Cu,Pd, and Ni an inverse Hall-Petch effect (i.e. softening at smallest grain size) is observed. the case of the sintered nano phase material the remaining pores significantly reduce the strength of the material (growth of pores).

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Tags:

• Mechanical
• Properties
• of
• Nano-phase
• Metals
• Tensile
• test

[oryxchannel]

youtube related and "nano" woohoo!!

[jsph345]

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[seneca67]

Is the showing molecular diffusion under tension? Are the kinetics anisotropic with respect to the axis of tension?

[ISuperJanI]

nice, where can we find more of these?