Direct measurement of shear stress for dislocation transferring across {111} Σ3 grain boundary in aluminum bicrystal via in situ straining TEM

Ii, Seiichiro; Enami, Takero; Ohmura, Takahito; Tsurekawa, Sadahiro

doi:10.1016/j.scriptamat.2022.114953

Cited by 5 publications

(11 citation statements)

References 40 publications

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“…In polycrystalline materials, under a given external force, the grain oriented in the direction with the maximum Schmid factor attains critical shear stress at an earlier stage, initiating slip. , However, due to the varying orientations of neighboring grains, namely, different slip system orientations, moving dislocations create dislocation pile-ups at grain boundaries. This accumulation of dislocations leads to stress concentration, resulting in an increased tensile strength and reduced ductility in ECFs .…”

Section: Resultsmentioning

confidence: 99%

Relationship between the Orientation of the (100) Crystal Plane and Elongation in Ultrathin Electrolytic Copper Foils

Fan,

Hu,

et al. 2024

J. Phys. Chem. C

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Electrolytic copper foils (ECFs), owing to their excellent mechanical properties and conductivity, have become an indispensable component as an anodic current collector in lithiumion batteries. ECFs often show texture properties, but the intrinsic relationship between the texture and mechanical properties is rarely reported. The authors find a conspicuous preference for the (100) crystal plane in 6 and 8 μm ultrathin ECFs with high elongation. And certain ECFs even exhibit a positive correlation trend between elongation and the (100) relative texture coefficient. It can be inferred that enhancing the (100) texture contributes to the improvement of the elongation in ECFs. Moreover, the Schmid factor values for the ( 111), (100), and ( 110) planes are calculated. The results revealed that the number of slip systems that can be activated under different tensile directions of the (100) plane is the largest, while the number of (110) plane is the least. It implies that under equivalent conditions, ECFs with (100) plane orientation are more prone to undergo plastic deformation, thereby facilitating high elongation. In contrast, the (110) plane orientation contributes to a high tensile strength.

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Section: Resultsmentioning

confidence: 99%

Relationship between the Orientation of the (100) Crystal Plane and Elongation in Ultrathin Electrolytic Copper Foils

Fan,

Hu,

et al. 2024

J. Phys. Chem. C

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“…7, respectively. Dislocations are activated from the contact between indent and sample in the grain A 17) .…”

Section: はじめにmentioning

confidence: 99%

“…The dashed black lines evaluating of the pseudo yield stress in the bicrystal are also drawn in the stress-strain curve. The initial stage of the S-S curve is also shown17) .…”

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confidence: 99%

“…A-D inserted into the lower right on each image correspond to points A to D indicated in the S-S curve in Fig.7, respectively. Dislocations are activated from the contact between indent and sample in the grain A17) .…”

mentioning

confidence: 99%

“…(b) Cross-sectional scheme of dislocation reaction. In this process, dislocations nucleated in grain A move to the grain boundary and transmit to grain B with the remaining dislocation on the grain boundary17) .…”

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confidence: 99%

See 2 more Smart Citations

Nano Mechanical Characterization and Physical Modeling of Plastic Deformation Chapter 1: Dislocation-Grain Boundary Interaction as a Strengthening Factor

Ohmura

Wakeda

2023

J. Japan Inst. Metals and Materials

Self Cite

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Mechanical behaviors of metallic materials in a small scale are characterized and physically modeled based on experimental measurements and computational simulation. Local plasticity in the vicinity of a grain boundary is considered in terms of an interaction between dislocation and grain boundary. It is shown experimentally that nanoindentation technique can detect a resistance to dislocation slip transfer by a grain boundary with a geometrical or a chemical factor. Molecular dynamic simulation revealed that the geometrical effect depends on not only a misorientation but also a combination with a dislocation character. TEM in-situ straining has a great potential to measure directly a critical stress upon slip transfer as well as a dislocation reaction at a grain boundary. Another potential reaction of a dislocation absorption at a grain boundary was discussed based on both the experimental results by TEM in-situ observation and the atomistic simulation in bcc metals.

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Dislocation penetration in basal-to-prismatic slip transfer in Mg: A fracture mechanics criterion

Matsumoto

2024

Engineering Fracture Mechanics

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Direct measurement of shear stress for dislocation transferring across {111} Σ3 grain boundary in aluminum bicrystal via in situ straining TEM

Cited by 5 publications

References 40 publications

Relationship between the Orientation of the (100) Crystal Plane and Elongation in Ultrathin Electrolytic Copper Foils

Relationship between the Orientation of the (100) Crystal Plane and Elongation in Ultrathin Electrolytic Copper Foils

Nano Mechanical Characterization and Physical Modeling of Plastic Deformation Chapter 1: Dislocation-Grain Boundary Interaction as a Strengthening Factor

Dislocation penetration in basal-to-prismatic slip transfer in Mg: A fracture mechanics criterion

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