Twinning and De-twinning via Glide and Climb of Twinning Dislocations along Serrated Coherent Twin Boundaries in Hexagonal-close-packed Metals

Wang, Jian; Liu, L.; Tomé, Carlos N.; Mao, Scott X.; Gong, Shengkai

doi:10.1080/21663831.2013.779601

Cited by 184 publications

(86 citation statements)

References 38 publications

(63 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The primary TB comprises PB and BP steps and deviates from the twin plane. Atomistic simulations confirmed the motion of PB/BP interfaces under a stress normal to the interface [32,58]. Based on these observations, Prism↔Basal transformation mechanism was proposed for twin growth [58,60,93].…”

Section: Twinning In Nano-sized Single Crystalsmentioning

confidence: 60%

“…Atomistic simulations confirmed the motion of PB/BP interfaces under a stress normal to the interface [32,58]. Based on these observations, Prism↔Basal transformation mechanism was proposed for twin growth [58,60,93]. The resultant extension strain 6.5% in one direction (Basal → Prism) and contraction strain −6.5% in the orthogonal direction (Prism → Basal) together are equivalent to a shear strain associated with the twinning shear.…”

Section: Twinning In Nano-sized Single Crystalsmentioning

confidence: 69%

“…The coherent PB facets are no longer glissile in the y-direction. As verified in atomistic simulations [21,32,58,66], they can only move by the nucleation of TD pairs that sweep the facet and cause it to advance by one atomic unit in the y-direction.…”

Section: Twin Shapementioning

confidence: 98%

“…In the hcp system, arrays of TDs often relax into a PB or BP facet, as demonstrated in numerous experimental observation and MD simulations [21,22,30,31,[58][59][60][61][62][63][64][65][66][67]. These facets correspond to disclination dipoles [26,30,59].…”

Section: Disclinationsmentioning

confidence: 99%

“…There is extensive evidence supporting such a view, including molecular dynamic simulations [19,21,31,[39][40][41][48][49][50]58,66,88], shear offsets of defects serving as markers, e.g. Figures 43 and 45 in [8], the lenticular shape observed for such twins, e.g.…”

Section: Twin Shapementioning

confidence: 99%

See 4 more Smart Citations

Interface structures and twinning mechanisms of twins in hexagonal metals

Gong

Hirth

Liu

et al. 2017

Materials Research Letters

View full text Add to dashboard Cite

A controversy concerning the description of {1012} 1011 twinning, whether it is shear-shuffle or pure glide-shuffle or pure shuffle, has developed. There is disagreement about the interpretation of transmission electron microscopic observations, atomistic simulations and theories for twin growth. In this article, we highlight the atomic-level, characteristic, equilibrium and non-equilibrium boundaries and corresponding boundary defects associated with the threedimensional 'normal', 'forward' and 'lateral' propagation of {1012} growth/annealing and deformation twins. Although deformation twin boundaries (TBs) after recovery exhibit some similarity to growth/annealing TBs because of the plastic accommodation of stress fields, there are important distinctions among them. These distinctions distinguish among the mechanisms of twin growth and resolve the controversy. In addition, a new type of disconnection, a glide disclination, is described for twinning. Synchroshear, seldom considered, is shown to be a likely mechanism for {1012} twinning. IMPACT STATEMENTA controversy concerning {1012} 1011 twinning in hcp metals has developed. We present comprehensive understanding of interface structures and twinning mechanisms of {1012} growth/annealing and deformation twins at the atomic level. ARTICLE HISTORY

show abstract