The effect of dislocation density on the interactions between dislocations and twin boundaries in nanocrystalline materials

Ni, Song; Wang, Y.B.; Liao, Xiaozhou; Figueiredo, Roberto B.; Li, H.Q.; Ringer, Simon P.; Langdon, Terence G.; Zhu, Yuntian

doi:10.1016/j.actamat.2012.02.026

Cited by 140 publications

(45 citation statements)

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“…Therefore, the observed dislocations with Burgers vectors not lying on {1 1 1} TB2 are formed through the interactions of partials on {1 1 1} TB2 with previous TB1s [32,33]. Accordingly, it is reasonable to propose that, during the de-twinning process, extensive dislocation reactions with primary TBs occurred as shown in Figure 2 and as supported by the literature [16,28,30,34,35]. The dislocation reactions became more pronounced at the TBs of the thin primary twins while the matrix area was increased [16,36].…”

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confidence: 52%

Grain boundary formation by remnant dislocations from the de-twinning of thin nano-twins

Cao

Wang

et al. 2015

Scripta Materialia

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confidence: 52%

Grain boundary formation by remnant dislocations from the de-twinning of thin nano-twins

Cao

Wang

et al. 2015

Scripta Materialia

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“…Σ3 boundaries have been found to either block slip transmission [7,30,31] or permit transmission only after some accumulation of dislocations at the boundary [12,16,17,31,38]. Emission of perfect [4,39] and partial [29,40] dislocations from Σ3 boundaries has also been reported.…”

Section: Methodsmentioning

confidence: 96%

Crystallographic orientation and boundary effects on misorientation development in austenitic stainless steel

Chakrabarty

Mishra

Pant

2014

Materials Science and Engineering: A

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“…TBs can act as barriers to impede dislocation motion. Some experimental work on the atomic level observations reveals the effect of grain size, 173,174 dislocation density, 175 twin thickness 176 on the interactions between dislocations and TBs, and the dislocation-TB reaction induced detwinning behaviors. 177,178 The development of in situ atomic scale experimental techniques promotes the investigation of dynamic dislocation-TB interaction modes.…”

Section: -151mentioning

confidence: 99%

Nanotwinned and hierarchical nanotwinned metals: a review of experimental, computational and theoretical efforts

Sun

2018

npj Comput Mater

122

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The recent studies on nanotwinned (NT) and hierarchical nanotwinned (HNT) face-centered cubic (FCC) metals are presented in this review. The HNT structures have been supposed as a kind of novel structure to bring about higher strength/ductility than NT counterparts in crystalline materials. We primarily focus on the recent developments of the experimental, atomistic and theoretical studies on the NT and HNT structures in the metallic materials. Some advanced bottom-up and top-down techniques for the fabrication of NT and HNT structures are introduced. The deformation induced HNT structures are available by virtue of severe plastic deformation (SPD) based techniques while the synthesis of growth HNT structures is so far almost unavailable. In addition, some representative molecular dynamics (MD) studies on the NT and HNT FCC metals unveil that the nanoscale effects such as twin spacing, grain size and plastic anisotropy greatly alter the performance of NT and HNT metals. The HNT structures may initiate unique phenomena in comparison with the NT ones. Furthermore, based on the phenomena and mechanisms revealed by experimental and MD simulation observations, a series of theoretical models have been proposed. They are effective to describe the mechanical behaviors of NT and HNT metals within the applicable scope. So far the development of manufacturing technologies of HNT structures, as well as the studies on the effects of HNT structures on the properties of metals are still in its infancy. Further exploration is required to promote the design of advanced materials.

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The effect of dislocation density on the interactions between dislocations and twin boundaries in nanocrystalline materials

Cited by 140 publications

References 49 publications

Grain boundary formation by remnant dislocations from the de-twinning of thin nano-twins

Grain boundary formation by remnant dislocations from the de-twinning of thin nano-twins

Crystallographic orientation and boundary effects on misorientation development in austenitic stainless steel

Nanotwinned and hierarchical nanotwinned metals: a review of experimental, computational and theoretical efforts

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