Atomistic observation of a crack tip approaching coherent twin boundaries.
Atomistic observation of a crack tip approaching coherent twin boundaries.
复制标题
裂纹尖端的原子观察到接近相干双重边界的原子观察。
DOI:
10.1038/srep04397
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发表时间:
2014-03-18
影响因子:
4.6
通讯作者:
Mao SX
中科院分区:
文献类型:
--
作者:
Liu L;Wang J;Gong SK;Mao SX
Coherent twin boundaries (CTBs) in nano-twinned materials could improve crack resistance. However, the role of the CTBs during crack penetration has never been explored at atomic scale. Our in situ observation on nano-twinned Ag under a high resolution transmission electron microscope (HRTEM) reveals the dynamic processes of a crack penetration across the CTBs, which involve alternated crack tip blunting, crack deflection, twinning/detwinning and slip transmission across the CTBs. The alternated blunting processes are related to the emission of different types of dislocations at the crack tip and vary with the distance of the crack tip from the CTBs.
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影响因子:
4.6
作者:
Lee, Joon Hwan;Holland, Troy B.;Mukherjee, Amiya K.;Zhang, Xinghang;Wang, Haiyan
通讯作者:
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影响因子:
17.1
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Sansoz, Frederic
影响因子:
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