Effects of orientation and pre-deformation on velocity profiles of dislocation avalanches in gold microcrystals

Effects of orientation and pre-deformation on velocity profiles of dislocation avalanches in gold microcrystals
复制标题

取向和预变形对金微晶位错雪崩速度分布的影响

DOI:
10.1140/epjb/e2018-90586-5
复制
发表时间:
2019
期刊:
The European Physical Journal B
影响因子:
--
通讯作者:
Maaß, Robert
Maaß, Robert
中科院分区:
--
文献类型:
--
作者:
Sparks, Gregory;Maaß, Robert

文献摘要

参考文献

被引文献

相似文献

摘要本文报道了不同取向和不同初始位错密度的金微晶体中位错雪崩(晶体滑移)的时空动力学。研究发现,尺度积分平均速度剖面具有与取向相关和与初始微观结构相关的峰值速度和速度衰减。随着对称性和表观应变硬化率的增加,峰值速度降低,平均形状轮廓速度随时间衰减更慢。这些实验结果表明,在所研究的微晶体中,滑移事件的净量级为几到几百个汉堡矢量,而滑移事件的基础是集体位错重排的材料特异性。此外,我们指出敏感性过滤细节,可能会显著影响结论时,比较实验与理论。图形抽象
AbstractWe report on the spatiotemporal dynamics of dislocation avalanches (crystallographic slip) in gold microcrystals with different orientations and also different initial dislocation densities. It is found that the size-integrated averaged velocity profiles have both orientation-dependent and initial-microstructure-dependent peak velocities and velocity decays. With increasing symmetry and apparent strain-hardening rate, the peak velocities decrease and the velocity of the average shape profile decays more slowly with time. These experimental results indicate the material-specific nature of collective dislocation rearrangements that underlie slip events with a net magnitude of a few to several hundred Burgers vectors in the studied microcrystals. Furthermore, we point toward sensitivity to filtering details that may significantly affect conclusions when comparing experiment with theory.Graphical abstract
DOI: 10.1071/ph600316a
发表时间: 1960
期刊: Australian Journal of Physics
影响因子: --
作者:
L. Clarebrough;M. Hargreaves
通讯作者: M. Hargreaves
DOI: 10.1103/physrevlett.89.165501
发表时间: 2002-10-14
影响因子: 8.6
作者:
Miguel, MC;Vespignani, A;Zapperi, S
通讯作者: Zapperi, S
DOI: 10.1179/174328412x13409726212768
发表时间: 2012-11-01
影响因子: 1.8
作者:
Brown, L. M.
通讯作者: Brown, L. M.
DOI: 10.1016/j.msea.2006.01.169
发表时间: 2007-07-25
影响因子: 6.4
作者:
Chmelik, Frantisek;Klose, Frank B.;Lukac, Pavel
通讯作者: Lukac, Pavel
DOI: 10.1016/j.actamat.2017.06.023
发表时间: 2018-01-15
期刊: ACTA MATERIALIA
影响因子: 9.4
作者:
Maass, R.;Derlet, P. M.
通讯作者: Derlet, P. M.