Irradiation-enhanced twin boundary migration in BCC Fe

Song, Dingkun; Li, Xiaoguai; Xue, Jianming; Duan, Huiling; Jin, Zhaohui

doi:10.1080/09500839.2014.913105

Cited by 17 publications

(6 citation statements)

References 42 publications

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“…Electron beam irradiation is suspected to affect the twin boundary structures and migration of the twin boundaries 14,15 . To exclude this effect, beam-blanked experiments were carried out (see Supplementary Fig.…”

Section: Resultsmentioning

confidence: 99%

Unstable twin in body-centered cubic tungsten nanocrystals

Wang

et al. 2020

Nat Commun

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Twinning is commonly activated in plastic deformation of low stacking-fault face-centered cubic (Fcc) metals but rarely found in body-centered cubic (Bcc) metals under room temperature and slow strain rates. Here, by conducting in situ transmission electron microscopy (TEM) at atomic scale, we discover that, in stark contrast to those in most Fcc metals, a majority of deformation twins in Bcc metals are unstable and undergo spontaneously detwinning upon unloading. Such unexpected instability of Bcc twins is found to be closely related to the prevalence of the inclined twin boundaries—a peculiar structure where twin boundaries are not parallel to the twinning plane, and the degree of instability is in direct proportion to the fraction of the inclined twin boundary. This work provides significant insights into the structure and stability of deformation twins in Bcc metals.

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Section: Resultsmentioning

confidence: 99%

Unstable twin in body-centered cubic tungsten nanocrystals

Wang

et al. 2020

Nat Commun

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“…ITBs in pure metals can migrate under shear stress through the collective glide of partials [78,79], known as the phase-boundary-migration (PBM) mechanism [80,81]. Impingement of defect clusters during radiation can enhance TB migration by lowering the activation energy barrier for dislocation glide [82]. Consequently, heavy ion irradiation induces ITB migration and detwinning in NTCu, as shown schematically in Fig.…”

Section: Thickness and Temperature Dependent Detwinning In Nt-cumentioning

confidence: 99%

9R phase enabled superior radiation stability of nanotwinned Cu alloys via in situ radiation at elevated temperature

et al. 2019

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“…To reveal the fundamental mechanisms underlying the localization phenomena in irradiated materials, computational simulations such as molecular dynamics (MD) and dislocation dynamics (DD) simulations have been performed (de la Rubia et al, 2000;Martinez et al, 2008;Marian et al, 2009;Bai et al, 2010;Arsenlis et al, 2012;Song et al, 2014). For example, to get insight into the progress of hardening and embrittlement in irradiated BCC Fe, Arsenlis et al (2012) used DD simulations with different concentrations of dislocations and found the highly localized inhomogenous interaction between defect loops and slip dislocations.…”

Section: Introductionmentioning

confidence: 99%