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On the heterogeneity of local shear strain induced by high-pressure torsion

On the heterogeneity of local shear strain induced by high-pressure torsion
On the heterogeneity of local shear strain induced by high-pressure torsion

A ductile duplex stainless steel consisting of a ferrite phase and an austenitic phase is chosen as a model material to investigate the development of shear strain patterns under high-pressure torsion. Systematic analysis on the macroscopic and microscopic heterogeneities of local shear strain reveals that complex shear patterns can be developed only above a high strain level where the grain sizes are already refined to a steady state. It is concluded that grain boundary-mediated deformation mechanisms provide sufficient freedom for reshaping the austenite phase domains, and thus the intrinsic factor required for the formation of these complicated shear patterns is well-developed ultrafine grains and/or nanograins.

deformation twinning, high-pressure torsion, microstructures, shear strains, steels
1438-1656
1-8
Jiang, Wei
7590ab5f-9727-484f-a13f-100ad68cae12
Zhou, Hao
e7267007-7985-4ad5-9218-9c4447ed8fab
Cao, Yang
e1e35409-0fbb-4ce3-93e1-cd4a122c9d83
Nie, Jinfeng
d62988b6-0c6c-4efd-bb97-e66d7c45a19e
Li, Yusheng
7f45e2ed-7380-44eb-9bae-34ce3d93eb6b
Zhao, Yonghao
a1946ade-15b3-409a-9f81-93919b91065d
Kawasaki, Megumi
944ba471-eb78-46db-bfb7-3f0296d9ef6d
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Zhu, Yuntian
d8c45f77-fa92-4cfc-8e7e-6e284217aa94
Jiang, Wei
7590ab5f-9727-484f-a13f-100ad68cae12
Zhou, Hao
e7267007-7985-4ad5-9218-9c4447ed8fab
Cao, Yang
e1e35409-0fbb-4ce3-93e1-cd4a122c9d83
Nie, Jinfeng
d62988b6-0c6c-4efd-bb97-e66d7c45a19e
Li, Yusheng
7f45e2ed-7380-44eb-9bae-34ce3d93eb6b
Zhao, Yonghao
a1946ade-15b3-409a-9f81-93919b91065d
Kawasaki, Megumi
944ba471-eb78-46db-bfb7-3f0296d9ef6d
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Zhu, Yuntian
d8c45f77-fa92-4cfc-8e7e-6e284217aa94

Jiang, Wei, Zhou, Hao, Cao, Yang, Nie, Jinfeng, Li, Yusheng, Zhao, Yonghao, Kawasaki, Megumi, Langdon, Terence G. and Zhu, Yuntian (2020) On the heterogeneity of local shear strain induced by high-pressure torsion. Advanced Engineering Materials, 22 (1), 1-8, [1900477]. (doi:10.1002/adem.201900477).

Record type: Article

Abstract

A ductile duplex stainless steel consisting of a ferrite phase and an austenitic phase is chosen as a model material to investigate the development of shear strain patterns under high-pressure torsion. Systematic analysis on the macroscopic and microscopic heterogeneities of local shear strain reveals that complex shear patterns can be developed only above a high strain level where the grain sizes are already refined to a steady state. It is concluded that grain boundary-mediated deformation mechanisms provide sufficient freedom for reshaping the austenite phase domains, and thus the intrinsic factor required for the formation of these complicated shear patterns is well-developed ultrafine grains and/or nanograins.

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Cao-AEM-2019 - Accepted Manuscript
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More information

Accepted/In Press date: 30 August 2019
e-pub ahead of print date: 30 August 2019
Published date: 1 January 2020
Keywords: deformation twinning, high-pressure torsion, microstructures, shear strains, steels

Identifiers

Local EPrints ID: 435925
URI: http://eprints.soton.ac.uk/id/eprint/435925
ISSN: 1438-1656
PURE UUID: b18eb249-c624-4809-9b58-c5cdcd4341e8
ORCID for Terence G. Langdon: ORCID iD orcid.org/0000-0003-3541-9250

Catalogue record

Date deposited: 22 Nov 2019 17:30
Last modified: 26 Nov 2021 06:18

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Contributors

Author: Wei Jiang
Author: Hao Zhou
Author: Yang Cao
Author: Jinfeng Nie
Author: Yusheng Li
Author: Yonghao Zhao
Author: Megumi Kawasaki
Author: Yuntian Zhu

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