Sliding behavior of coincidence grain boundaries deviating from ideal symmetric tilt relationship

Fukutomi, Hiroshi; Iseki, Tomohiro; Endo, Takao; Kamijo, Taichi

doi:10.1016/0956-7151(91)90229-t

Cited by 58 publications

(21 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Fukutomi et al performed high-temperature, constant-load tensile creep test on Al bi-crystals containing a < 110 > Σ 11 {113} symmetric tilt boundary [ 3 ] as well as boundaries that deviated slightly from the ideal orientation. [ 33 ] They observed that the deformation was dominated by the migration of the grain boundary with some sliding attributed to the movement of DSC (the lattice defi ned by the set of displacements that conserve the CSL lattice structure) dislocations. This intrinsic dislocation mechanism, glide coupled with migration, was also observed in hot-stage TEM along a near-Σ 5 boundary.…”

Section: Discussionmentioning

confidence: 99%

Grain Boundary Sliding in Aluminum Nano‐Bi‐Crystals Deformed at Room Temperature

Aitken¹,

Jang²,

Weinberger³

et al. 2013

Small

View full text Add to dashboard Cite

Room-temperature uniaxial compressions of 900-nm-diameter aluminum bi-crystals, each containing a high-angle grain boundary with a plane normal inclined at 24° to the loading direction, revealed frictional sliding along the boundary plane to be the dominant deformation mechanism. The top crystallite sheared off as a single unit in the course of compression instead of crystallographic slip and extensive dislocation activity, as would be expected. Compressive stress strain data of deforming nano bicrystals was continuous, in contrast to single crystalline nano structures that show a stochastic stress strain signature, and displayed a peak in stress at the elastic limit of ~ 176 MPa followed by gradual softening and a plateau centered around ~ 125 MPa. An energetics-based physical model, which may explain observed room-temperature grain boundary sliding, in presented, and observations are discussed within the framework of crystalline nano-plasticity and defect microstructure evolution.

show abstract

Section: Discussionmentioning

confidence: 99%

Grain Boundary Sliding in Aluminum Nano‐Bi‐Crystals Deformed at Room Temperature

Aitken¹,

Jang²,

Weinberger³

et al. 2013

Small

View full text Add to dashboard Cite

show abstract

“…GB motion coupled to shear has been experimentally studied first for LAGBs [16,17] and also for HAGB bicrystals [18][19][20][21][22][23][24][25][26]9]. Recently, GB shear-coupled migration has been investigated in small-grained polycrystals containing HAGBs [4,5,9].…”

Section: Introductionmentioning

confidence: 99%

The role of disconnections in deformation-coupled grain boundary migration

et al. 2014

View full text Add to dashboard Cite

“…Stress-induced GB motion was observed in first-principles calculations [371][372][373] and atomistic simulations [229,[374][375][376][377], as well as in experiments on low-angle [378,379] and more recently high-angle [380][381][382][383][384][385][386][387][388][389] GBs. That the coupling effect might be a generic property of most GBs was proposed in the Cahn-Taylor "unified approach" paper [390] based on theoretical considerations.…”

Section: Grain Boundary Motion Coupled To Shear Deformationmentioning

confidence: 99%

Atomistic modeling of interfaces and their impact on microstructure and properties

2010

View full text Add to dashboard Cite

Atomic-level modeling of materials provides fundamental insights into phase stability, structure and properties of crystalline defects, and to physical mechanisms of many processes ranging from atomic diffusion to interface migration. This knowledge often serves as a guide for the development of mesoscopic and macroscopic continuum models, with input parameters provided by atomistic models. This paper gives an overview of the most recent developments in the area of atomistic modeling with emphasis on interfaces and their impact on microstructure and properties of materials. Modern computer simulation methodologies are discussed and illustrated by several applications related to thermodynamic, kinetic and mechanical properties of materials. Existing challenges and future research directions in this field are outlined.

show abstract

Sliding behavior of coincidence grain boundaries deviating from ideal symmetric tilt relationship

Cited by 58 publications

References 8 publications

Grain Boundary Sliding in Aluminum Nano‐Bi‐Crystals Deformed at Room Temperature

Grain Boundary Sliding in Aluminum Nano‐Bi‐Crystals Deformed at Room Temperature

The role of disconnections in deformation-coupled grain boundary migration

Atomistic modeling of interfaces and their impact on microstructure and properties

Contact Info

Product

Resources

About