Dislocation evolution in twins of cyclically deformed copper

Guo, Xiaoguang; Lü, Lei; Li, S. X.

doi:10.1080/09500830500437450

Cited by 13 publications

(3 citation statements)

References 20 publications

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“…7a, which is in agreement with experimental observations (Boettner et al, 1964;Guo et al, 2005;Hashimoto et al, 1999;Llanes and Laird, 1992;Miao et al, 2009;Qu et al, 2008;Thompson, 1972) and Fig. 1a,b as twins are evident within the facets.…”

Section: Resultssupporting

confidence: 92%

“…From Fig. 1a,b, twinning is observed near the facet features, thus indicating that cracks initiate near the twin boundaries, as reported in literature (Boettner et al, 1964;Guo et al, 2005;Hashimoto et al, 1999;Llanes and Laird, 1992;Miao et al, 2009;Qu et al, 2008;Thompson, 1972). Material characterization in the form of TEM analysis was performed, which provided key insights that can be used to model the microstructure and resulting dislocation arrangements.…”

Section: Materials and Experimental Methodsmentioning

confidence: 64%

See 1 more Smart Citation

An energy-based microstructure model to account for fatigue scatter in polycrystals

Sangid

Maier

Şehitoğlu

2011

Journal of the Mechanics and Physics of Solids

101

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Section: Resultssupporting

confidence: 92%

Section: Materials and Experimental Methodsmentioning

confidence: 64%

An energy-based microstructure model to account for fatigue scatter in polycrystals

Sangid

Maier

Şehitoğlu

2011

Journal of the Mechanics and Physics of Solids

101

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“…of metallic materials were affected by the evolution of dislocation structures. Whereas, cyclic hardening or cyclic softening were caused due to the movement of dislocations and the interaction between them, [49][50][51] and not just due to the difference of the applied total strain amplitude. However, the evolution of dislocation structures involves many factors, including alloy composition, initial dislocation configuration, and material preparation history.…”

Section: Microstructure Evolution Of Cu-cr-zr Alloys During Fatigue D...mentioning

confidence: 99%

Low cycle fatigue behavior of Cu‐Cr‐Zr alloy with different cold deformation

Chen

Xiao

Xiong

et al. 2022

Fatigue Fract Eng Mat Struct

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The present study addressed the cyclic deformation behavior and fatigue properties of Cu‐0.69Cr‐0.07Zr alloy with different cold deformation (ε = 64%, 75%, and 84%) using low cycle fatigue test. Low cycle fatigue tests were conducted under fully‐reversed conditions at different total strain amplitudes. The microstructure changes and fatigue fracture characteristics were analyzed by scanning electron microscope (SEM) and transmission electron microscope (TEM). The main findings suggest that the Bauschinger effect was significantly stronger with larger deformation at low total strain amplitude. And it was proved that the relationship between the total strain amplitude and the low cycle fatigue life of Cu‐Cr‐Zr alloy with different deformation can be expressed by the Manson–Coffin–Basquin formula. Further, the reason for the fatigue life was shorter and the cyclic softening rate decreased faster at high applied total strain amplitude was that the dislocation density decreased due to the rearrangement of the dislocations.

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Dislocation Evolution in Cyclic‐Loaded Cu Nanopillars with Different Configurations

Li,

Zhao,

Zhang

et al. 2024

Small

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Small‐sized metals generally exhibit unusual deformation responses subjected to cyclic loading, since their limited volume cannot effectively accommodate micro‐sized dislocation patterns typically found in their bulk counterparts. Here, the cyclic behaviors in Cu nanopillars with different configurations are investigated using in situ transmission electron microscopy fatigue test. Dislocation tangles formed in single‐ and twinned‐crystal nanopillars as a result of cycling‐induced operations of multiple slip systems and further unpinning and absorption of pinned dislocations. While, nanopillars configured with low‐angle grain boundary (LAGB) underwent the degradation and eventual decomposition of the LAGB due to the cycling‐induced emission of grain boundary dislocations, which resulted in high‐density mobile dislocations to withstand the cyclic loading. These findings contribute to a systematic and comprehensive understanding of the micro‐mechanics of dislocation‐related phenomena in the cyclic response of nanoscale metals.

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Dislocation evolution in twins of cyclically deformed copper

Cited by 13 publications

References 20 publications

An energy-based microstructure model to account for fatigue scatter in polycrystals

An energy-based microstructure model to account for fatigue scatter in polycrystals

Low cycle fatigue behavior of Cu‐Cr‐Zr alloy with different cold deformation

Dislocation Evolution in Cyclic‐Loaded Cu Nanopillars with Different Configurations

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