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Microstructural heterogeneity in hexagonal close-packed pure Ti processed by high-pressure torsion

Microstructural heterogeneity in hexagonal close-packed pure Ti processed by high-pressure torsion
Microstructural heterogeneity in hexagonal close-packed pure Ti processed by high-pressure torsion
Microstructural evolution was studied quantitatively by electron backscatterring diffraction in commercial purity Ti processed by high-pressure torsion (HPT) at room temperature. The results show that a heterogeneous microstructure develops during HPT processing with regions of both nanocrystalline grains (<100 nm) and coarse grains (~1-30 m). Tensile {10 2} twins were observed in the center of the disk after the first turn of HPT. The microhardness near the disk center increases with increasing HPT turns and the hardness after 5 turns is reasonably homogeneous at radial positions >1 mm. The mechanism of grain refinement is characterized by dynamic recrystallization and the continuous formation of a necklace-like array of fine grains gradually consumes the larger grains in subsequent passes
0022-2461
4838-4844
Chen, Y.J
83a578cf-86c9-4e67-b582-1c9b1b006fc6
Li, Y.J
4b288122-5d5d-487b-8040-02456e2b193c
Walmsley, J.C
4cb9bc12-6262-4e1a-bcd7-1df774aa37b4
Gao, N.
9c1370f7-f4a9-4109-8a3a-4089b3baec21
Roven, H.J
d33a753b-01c1-48e4-a88b-f9deea5bc328
Starink, M.J.
fe61a323-4e0c-49c7-91f0-4450e1ec1e51
Langdon, T.G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Chen, Y.J
83a578cf-86c9-4e67-b582-1c9b1b006fc6
Li, Y.J
4b288122-5d5d-487b-8040-02456e2b193c
Walmsley, J.C
4cb9bc12-6262-4e1a-bcd7-1df774aa37b4
Gao, N.
9c1370f7-f4a9-4109-8a3a-4089b3baec21
Roven, H.J
d33a753b-01c1-48e4-a88b-f9deea5bc328
Starink, M.J.
fe61a323-4e0c-49c7-91f0-4450e1ec1e51
Langdon, T.G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86

Chen, Y.J, Li, Y.J, Walmsley, J.C, Gao, N., Roven, H.J, Starink, M.J. and Langdon, T.G. (2012) Microstructural heterogeneity in hexagonal close-packed pure Ti processed by high-pressure torsion. Journal of Materials Science, 47 (12), 4838-4844. (doi:10.1007/s10853-012-6343-0).

Record type: Article

Abstract

Microstructural evolution was studied quantitatively by electron backscatterring diffraction in commercial purity Ti processed by high-pressure torsion (HPT) at room temperature. The results show that a heterogeneous microstructure develops during HPT processing with regions of both nanocrystalline grains (<100 nm) and coarse grains (~1-30 m). Tensile {10 2} twins were observed in the center of the disk after the first turn of HPT. The microhardness near the disk center increases with increasing HPT turns and the hardness after 5 turns is reasonably homogeneous at radial positions >1 mm. The mechanism of grain refinement is characterized by dynamic recrystallization and the continuous formation of a necklace-like array of fine grains gradually consumes the larger grains in subsequent passes

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More information

e-pub ahead of print date: 14 March 2012
Published date: June 2012
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 300702
URI: https://eprints.soton.ac.uk/id/eprint/300702
ISSN: 0022-2461
PURE UUID: 496ac04c-ef18-49a3-9d52-d71e6ef8fa9a
ORCID for T.G. Langdon: ORCID iD orcid.org/0000-0003-3541-9250

Catalogue record

Date deposited: 29 Feb 2012 10:03
Last modified: 10 Sep 2019 00:47

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