The effect of triple junction type on grain-boundary sliding and accomodation in aluminium tricrystals

Sisanbaev, A. V.; Valiev, Ruslan Z.

doi:10.1016/0956-7151(92)90048-j

Cited by 24 publications

(12 citation statements)

References 3 publications

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“…Fold is locally and severely deformed area in the matrix near TJ caused by impediment of GBS. It is known that fold is easily formed when directions of GBS and primary slip are close to each other, 2) and then, GBM and TJ migration take place toward the direction of the fold. 17) If the above explanation is applied to the present study, it can be expected that fold would be formed in the G. III (see Fig.…”

Section: Gbs and Tjmentioning

confidence: 99%

“…This stress concentration is more emphasized at around the tip of the TJ. 7) Sisanbaev and Valiev 2) have reported the importance of the TJ during creep in relation with grain-boundary sliding (GBS) and its accommodation at the TJ. Impediment of the GBS by the TJ sometimes causes a preferential cracking.…”

Section: Introductionmentioning

confidence: 99%

“…Numerous researches have been carried out about the roles of the grain boundary in mechanical behaviors at high temperatures, e.g. creep, 1,2) fracture strength, 3,4) fatigue 5) and so on. Sometimes, researches were carried out with usage of orientation controlled bicrystals to reveal clearly the effects of grain boundaries on the high-temperature mechanical behaviors.…”

Section: Introductionmentioning

confidence: 99%

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Preferential Dynamic Nucleation at Triple Junction in Copper Tricrystal During High-Temperature Deformation

et al. 2002

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Preferential nucleation of dynamic grains at triple junction (TJ) was investigated in copper tricrystal during high-temperature deformation. The nucleation of the dynamic grains at the TJ was observed at much lower strain than the peak strain where dynamic recrystallization (DRX) extensively took place. Further straining caused the incremental nucleation of dynamic grains on sliding grain boundaries accompanied by grain-boundary migration and serration. This occurred also at relatively lower strain than the peak strain. The DRX grains evolved to the most area of the tricrystal when deformed to about the peak strain. The observed preferential nucleation of DRX grains at the TJ was considered with relation of stress and deformation concentration there induced by folding and grain-boundary sliding.

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Section: Gbs and Tjmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Preferential Dynamic Nucleation at Triple Junction in Copper Tricrystal During High-Temperature Deformation

et al. 2002

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“…Several authors have reported that the junction lines, where three or more interfaces meet, have an important influence on a number of material properties. These include mechanical behaviour [2][3][4][5], wetting phenomena [6,7], diffusion effects [8][9][10], intergranular corrosion [11] and material amorphisation [12]. In the present work, we discuss the nature of junction lines in terms of defect character since this can provide a helpful framework for understanding their role in physical processes.…”

Section: Introductionmentioning

confidence: 99%

The defect character of interface junction lines

1997

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Abstract. Junction lines, where three or more interlaces meet in polycrystalline materials, are analysed from a topological point of view. Using circuit mapping methods, it is shown that, in contiguous polycrystals, the dislocations constituting the interfaces always react at junctions according to topological conservation principles. This conclusion is at variance with recent suggestions in the literature. In addition, it is shown that, in certain circumstances, junction lines can themselves exhibit defect character, i.e., dislocation and/or disclination character. Such defects arise in order to accommodate the coexistence of the abutting crystals. Simple examples are illustrated.

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“…These include material mechanical behaviour (Hashimoto, Fujii & Miura, 1987;Sisanbaev & Valiev, 1992), wetting phenomena (indekeu & Nikas, 1991), diffusion effects (Mikhailovskii, Rabukhin & Velikodnaya, 1991;Randle, 1993) and intergranular corrosion (Palumbo & Aust, 1988).…”

Section: Introductionmentioning

confidence: 99%

Symmetry Analysis of Interface Triple Junctions

Dimitrakopulos¹,

Karakostas²

1996

Acta Cryst Sect A

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The symmetry properties of triple junctions formed by crystal interfaces are presented using colour crystallography. Triple junctions are treated as composites of three crystals and are studied using the principle of superposition of symmetries. The conclusions are used for the understanding of the equivalences and invariances within one tricrystal composite and for studying such composites from the point of view of interfacial connectivity. A dissymmetrization procedure is established through which tricrystals equivalent by symmetry and their ways of coexistence can be found. Also, the relations between the symmetry properties of the tricrystal and those of the three bicrystals participating in the junction are given. Emphasis is placed on a particular class of composities that are termed variant constituted tricystals. In these, two out of three bicrystals belong to orientation variants of the same dichromatic pattern. Such composites are usual in polycrystals and can exhibit interesting symmetry properties. The ordinary symmetry and antisymmetry in the third bicrystal can be predicted using a given algorithm. Appropriate examples are given to illustrate the application of the analysis.

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The effect of triple junction type on grain-boundary sliding and accomodation in aluminium tricrystals

Cited by 24 publications

References 3 publications

Preferential Dynamic Nucleation at Triple Junction in Copper Tricrystal During High-Temperature Deformation

Preferential Dynamic Nucleation at Triple Junction in Copper Tricrystal During High-Temperature Deformation

The defect character of interface junction lines

Symmetry Analysis of Interface Triple Junctions

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