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|a New twinning route in face-centered cubic nanocrystalline metals
|h [electronic resource]
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|a Washington, D.C. :
|b United States. Department of Energy. Office of Science ;
|a Oak Ridge, Tenn. :
|b distributed by the Office of Scientific and Technical Information, U.S. Department of Energy,
|c 2017.
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|a Article No. 2142 (2017) :
|b digital, PDF file.
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|a text
|b txt
|2 rdacontent.
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|2 rdamedia.
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|a online resource
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|a Published through SciTech Connect.
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|a 12/15/2017.
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|a Nature Communications 8 1 ISSN 2041-1723 AM.
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|a Lihua Wang; Pengfei Guan; Jiao Teng; Pan Liu; Dengke Chen; Weiyu Xie; Deli Kong; Shengbai Zhang; Ting Zhu; Ze Zhang; Evan Ma; Mingwei Chen; Xiaodong Han.
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|a Twin nucleation in a face-centered cubic crystal is believed to be accomplished through the formation of twinning partial dislocations on consecutive atomic planes. Twinning should thus be highly unfavorable in face-centered cubic metals with high twin-fault energy barriers, such as Al, Ni, and Pt, but instead is often observed. Here, we report an in situ atomic-scale observation of twin nucleation in nanocrystalline Pt. Unlike the classical twinning route, deformation twinning initiated through the formation of two stacking faults separated by a single atomic layer, and proceeded with the emission of a partial dislocation in between these two stacking faults. Through this route, a three-layer twin was nucleated without a mandatory layer-by-layer twinning process. Furthermore, this route is facilitated by grain boundaries, abundant in nanocrystalline metals, that promote the nucleation of separated but closely spaced partial dislocations, thus enabling an effective bypassing of the high twin-fault energy barrier.
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|b SC0002623.
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|a Rensselaer Polytechnic Institute.
|4 res.
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|a United States.
|b Department of Energy.
|b Office of Science.
|4 spn.
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|a United States.
|b Department of Energy.
|b Office of Scientific and Technical Information.
|4 dst.
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|u http://www.osti.gov/scitech/biblio/1526300
|z Full Text (via OSTI)
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|a .b107870216
|b 10-03-19
|c 10-03-19
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|a web
|b 10-03-19
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|s 08da63ca-24e7-50d7-8081-14ca53cf6843
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|p Can circulate
|a University of Colorado Boulder
|b Online
|c Online
|d Online
|e E 1.99:1526300
|h Superintendent of Documents classification
|i web
|n 1
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