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
复制
发表时间:
2014-03-18
期刊:
影响因子:
4.6
通讯作者:
Mao SX
Mao SX
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Liu L;Wang J;Gong SK;Mao SX

文献摘要

参考文献

被引文献

相似文献

纳米孪晶材料中的共格孪晶界(CTB)可以提高材料的抗裂性。然而,CTB在裂纹穿透过程中的作用从未在原子尺度上进行过探索。我们在高分辨率透射电子显微镜(HRTEM)下对纳米孪晶Ag的原位观察揭示了裂纹贯穿CTBs的动态过程,包括交替的裂纹尖端钝化、裂纹偏转、孪晶/解孪晶和跨CTBs的滑移传输。交替钝化过程与裂纹尖端不同类型位错的发射有关,并随裂纹尖端距CTB的距离而变化。
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.
DOI: 10.1038/srep01061
发表时间: 2013
期刊: SCIENTIFIC REPORTS
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: Wang, Haiyan
DOI: 10.1021/nn900668p
发表时间: 2009-10-01
期刊: ACS NANO
影响因子: 17.1
作者:
Deng, Chuang;Sansoz, Frederic
通讯作者: Sansoz, Frederic
面心立方金属中非螺旋晶格位错与相格孪晶边界之间的相互作用
DOI: 10.1016/j.actamat.2007.11.020
发表时间: 2008-03-01
期刊: ACTA MATERIALIA
影响因子: 9.4
作者:
Jin, Z. -H.;Gumbsch, P.;Hahn, H.
通讯作者: Hahn, H.
DOI: 10.1016/j.actamat.2011.05.027
发表时间: 2011-08-01
期刊: ACTA MATERIALIA
影响因子: 9.4
作者:
Zhu, Linli;Ruan, Haihui;Lu, Jian
通讯作者: Lu, Jian
嵌入纳米级孪晶的块状纳米晶铜的断裂韧性增强
DOI: 10.1016/j.scriptamat.2008.12.012
发表时间: 2009-04-01
期刊: SCRIPTA MATERIALIA
影响因子: 6
作者:
Qin, E. W.;Lu, L.;Lu, K.
通讯作者: Lu, K.