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Microstructure and microhardness evolution in pure molybdenum processed by high-pressure torsion

Microstructure and microhardness evolution in pure molybdenum processed by high-pressure torsion
Microstructure and microhardness evolution in pure molybdenum processed by high-pressure torsion
Molybdenum, a refractory metal with a body-centred cubic lattice, was processed by high-pressure torsion (HPT) at room temperature under an applied pressure of 6.0 GPa and torsional straining from 1/2 to 10 turns. The microstructures were characterized by electron back-scatter diffraction (EBSD) and transmission electron microscopy (TEM) and measurements were taken of the Vickers microhardness. The results show a gradual evolution of homogeneity in grain size and microhardness with increasing numbers of HPT turns with an average grain size of ~690 nm at the sample edge after 5 turns and a saturation microhardness of ~660 Hv. The grain size after 10 turns showed a slight decrease at the centre and the microhardness was slightly lower than after 5 turns due to the occurrence of limited dynamic recovery
high-pressure torsion, microhardness, microstructural evolution, molybdenum, ultrafine grains
1438-1656
Wang, Xue
976221d1-3004-409c-8640-715bedfc5d15
Li, Ping
84293437-7ab4-4c22-b68b-937bfc57ee15
Huang, Yi
9f4df815-51c1-4ee8-ad63-a92bf997103e
Gao, Nong
9c1370f7-f4a9-4109-8a3a-4089b3baec21
Langdon, Terence G
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Wang, Xue
976221d1-3004-409c-8640-715bedfc5d15
Li, Ping
84293437-7ab4-4c22-b68b-937bfc57ee15
Huang, Yi
9f4df815-51c1-4ee8-ad63-a92bf997103e
Gao, Nong
9c1370f7-f4a9-4109-8a3a-4089b3baec21
Langdon, Terence G
86e69b4f-e16d-4830-bf8a-5a9c11f0de86

Wang, Xue, Li, Ping, Huang, Yi, Gao, Nong and Langdon, Terence G (2019) Microstructure and microhardness evolution in pure molybdenum processed by high-pressure torsion. Advanced Engineering Materials. (doi:10.1002/adem.201901022).

Record type: Article

Abstract

Molybdenum, a refractory metal with a body-centred cubic lattice, was processed by high-pressure torsion (HPT) at room temperature under an applied pressure of 6.0 GPa and torsional straining from 1/2 to 10 turns. The microstructures were characterized by electron back-scatter diffraction (EBSD) and transmission electron microscopy (TEM) and measurements were taken of the Vickers microhardness. The results show a gradual evolution of homogeneity in grain size and microhardness with increasing numbers of HPT turns with an average grain size of ~690 nm at the sample edge after 5 turns and a saturation microhardness of ~660 Hv. The grain size after 10 turns showed a slight decrease at the centre and the microhardness was slightly lower than after 5 turns due to the occurrence of limited dynamic recovery

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XueWang-single file-revision2-TGL - Accepted Manuscript
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e-pub ahead of print date: 27 November 2019
Keywords: high-pressure torsion, microhardness, microstructural evolution, molybdenum, ultrafine grains

Identifiers

Local EPrints ID: 436744
URI: http://eprints.soton.ac.uk/id/eprint/436744
ISSN: 1438-1656
PURE UUID: deb032eb-2acc-4be0-928d-c92ebd542fc6
ORCID for Yi Huang: ORCID iD orcid.org/0000-0001-9259-8123
ORCID for Nong Gao: ORCID iD orcid.org/0000-0002-7430-0319
ORCID for Terence G Langdon: ORCID iD orcid.org/0000-0003-3541-9250

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Date deposited: 03 Jan 2020 17:30
Last modified: 17 Mar 2024 05:11

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Contributors

Author: Xue Wang
Author: Ping Li
Author: Yi Huang ORCID iD
Author: Nong Gao ORCID iD

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