Mechanism of large strain accommodation assisted by shear localization in a precipitation-hardened Cu–Be alloy

Ivan Lomakin; Alfiia Nigmatullina; Xavier Sauvage

doi:10.1016/j.msea.2021.141760

Mechanism of large strain accommodation assisted by shear localization in a precipitation-hardened Cu–Be alloy

Ivan Lomakin^*, Alfiia Nigmatullina, Xavier Sauvage

^*Corresponding author for this work

Research output: Contribution to journal › Article › Scientific › peer-review

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Abstract

The influence of the structural state on deformation mechanisms under large strains was investigated in a Cu – 2 wt.% Be alloy. Torque evolutions during straining exhibit serrations typical of structural relaxations in the precipitation-hardened alloy, but not in the solid solution state. Microstructure characterization revealed that homogeneous deformation of the solid solution led to strong grain size reduction (20 nm), while localization occurred in the precipitated state with numerous shear bands. The role of CuBe precipitates on hindering dislocation glide and the resulting shear localization under large strain is discussed.

Original language	English
Article number	141760
Number of pages	6
Journal	Materials Science and Engineering A
Volume	823
DOIs	https://doi.org/10.1016/j.msea.2021.141760
Publication status	Published - 17 Aug 2021
MoE publication type	A1 Journal article-refereed

Keywords

Copper alloy
Precipitation
Shear band
Strain localization
Ultrafine grains

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10.1016/j.msea.2021.141760

Mechanism of large strain accommodation.1-s2.0-S0921509321010261-mainFinal published version, 3.3 MBLicence: CC BY

Cite this

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title = "Mechanism of large strain accommodation assisted by shear localization in a precipitation-hardened Cu–Be alloy",

abstract = "The influence of the structural state on deformation mechanisms under large strains was investigated in a Cu – 2 wt.% Be alloy. Torque evolutions during straining exhibit serrations typical of structural relaxations in the precipitation-hardened alloy, but not in the solid solution state. Microstructure characterization revealed that homogeneous deformation of the solid solution led to strong grain size reduction (20 nm), while localization occurred in the precipitated state with numerous shear bands. The role of CuBe precipitates on hindering dislocation glide and the resulting shear localization under large strain is discussed.",

keywords = "Copper alloy, Precipitation, Shear band, Strain localization, Ultrafine grains",

author = "Ivan Lomakin and Alfiia Nigmatullina and Xavier Sauvage",

note = "Funding Information: Ivan Lomakin and Xavier Sauvage are grateful to the Embassy of France in Russia for supporting their collaboration through Mechnikov{\textquoteright}s Scholarship. This work was partially supported by Saint Petersburg State University, Russia via Lot 2017 applied (id: 26130576 ). This work was partially supported by Academy of Finland through grant 317464 . XRD results were obtained by the “Center for X-ray Diffraction Methods” of the Research park of Saint Petersburg University. Anvils for HPT tool were produced in collaboration with center “Applied aerodynamics” of the Research park of Saint Petersburg University. Authors acknowledge the provision of facilities and technical support by Aalto University at OtaNano - Nanomicroscopy Center (Aalto-NMC). Funding Information: Ivan Lomakin and Xavier Sauvage are grateful to the Embassy of France in Russia for supporting their collaboration through Mechnikov's Scholarship. This work was partially supported by Saint Petersburg State University, Russia via Lot 2017 applied (id: 26130576). This work was partially supported by Academy of Finland through grant 317464. XRD results were obtained by the ?Center for X-ray Diffraction Methods? of the Research park of Saint Petersburg University. Anvils for HPT tool were produced in collaboration with center ?Applied aerodynamics? of the Research park of Saint Petersburg University. Authors acknowledge the provision of facilities and technical support by Aalto University at OtaNano - Nanomicroscopy Center (Aalto-NMC). Publisher Copyright: {\textcopyright} 2021 The Author(s)",

year = "2021",

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doi = "10.1016/j.msea.2021.141760",

language = "English",

volume = "823",

journal = "Materials Science and Engineering A",

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T1 - Mechanism of large strain accommodation assisted by shear localization in a precipitation-hardened Cu–Be alloy

AU - Lomakin, Ivan

AU - Nigmatullina, Alfiia

AU - Sauvage, Xavier

N1 - Funding Information: Ivan Lomakin and Xavier Sauvage are grateful to the Embassy of France in Russia for supporting their collaboration through Mechnikov’s Scholarship. This work was partially supported by Saint Petersburg State University, Russia via Lot 2017 applied (id: 26130576 ). This work was partially supported by Academy of Finland through grant 317464 . XRD results were obtained by the “Center for X-ray Diffraction Methods” of the Research park of Saint Petersburg University. Anvils for HPT tool were produced in collaboration with center “Applied aerodynamics” of the Research park of Saint Petersburg University. Authors acknowledge the provision of facilities and technical support by Aalto University at OtaNano - Nanomicroscopy Center (Aalto-NMC). Funding Information: Ivan Lomakin and Xavier Sauvage are grateful to the Embassy of France in Russia for supporting their collaboration through Mechnikov's Scholarship. This work was partially supported by Saint Petersburg State University, Russia via Lot 2017 applied (id: 26130576). This work was partially supported by Academy of Finland through grant 317464. XRD results were obtained by the ?Center for X-ray Diffraction Methods? of the Research park of Saint Petersburg University. Anvils for HPT tool were produced in collaboration with center ?Applied aerodynamics? of the Research park of Saint Petersburg University. Authors acknowledge the provision of facilities and technical support by Aalto University at OtaNano - Nanomicroscopy Center (Aalto-NMC). Publisher Copyright: © 2021 The Author(s)

PY - 2021/8/17

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N2 - The influence of the structural state on deformation mechanisms under large strains was investigated in a Cu – 2 wt.% Be alloy. Torque evolutions during straining exhibit serrations typical of structural relaxations in the precipitation-hardened alloy, but not in the solid solution state. Microstructure characterization revealed that homogeneous deformation of the solid solution led to strong grain size reduction (20 nm), while localization occurred in the precipitated state with numerous shear bands. The role of CuBe precipitates on hindering dislocation glide and the resulting shear localization under large strain is discussed.

AB - The influence of the structural state on deformation mechanisms under large strains was investigated in a Cu – 2 wt.% Be alloy. Torque evolutions during straining exhibit serrations typical of structural relaxations in the precipitation-hardened alloy, but not in the solid solution state. Microstructure characterization revealed that homogeneous deformation of the solid solution led to strong grain size reduction (20 nm), while localization occurred in the precipitated state with numerous shear bands. The role of CuBe precipitates on hindering dislocation glide and the resulting shear localization under large strain is discussed.

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KW - Precipitation

KW - Shear band

KW - Strain localization

KW - Ultrafine grains

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VL - 823

JO - Materials Science and Engineering A

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M1 - 141760

ER -

Mechanism of large strain accommodation assisted by shear localization in a precipitation-hardened Cu–Be alloy

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Keywords

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Mechanism of large strain accommodation assisted by shear localization in a precipitation-hardened Cu–Be alloy

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