Indentation strain burst phenomenon induced by grain boundaries in niobium

Indentation strain burst phenomenon induced by grain boundaries in niobium

Using depth-sensing indentation, a pop-in phenomenon induced by grain boundaries, namely, a sudden indenter displacement jump when indented near a grain boundary segment, was observed in polycrystalline niobium. This grain-boundary type of pop-in occurs at a larger force than the initial elasto-plas...

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Veröffentlicht in:Journal of materials research 2004-08, Vol.19 (8), p.2478-2486
Hauptverfasser: Wang, M.G., Ngan, A.H.W.
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Sprache:eng
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Grain boundaries
Hardness
Nanoindentation
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description Using depth-sensing indentation, a pop-in phenomenon induced by grain boundaries, namely, a sudden indenter displacement jump when indented near a grain boundary segment, was observed in polycrystalline niobium. This grain-boundary type of pop-in occurs at a larger force than the initial elasto-plastic pop-in, which is observed with and without a grain boundary nearby. The experimental results show that this pop-in effect has a close relationship with the misorientation across the grain boundary. The occurrence of this pop-in phenomenon is rationalized in terms of slip transmission across the grain boundary.
doi_str_mv 10.1557/JMR.2004.0316
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subjects Grain boundaries
Hardness
Nanoindentation
title Indentation strain burst phenomenon induced by grain boundaries in niobium
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