Grain refinement and superplastic flow in a fully lamellar Ti-6Al-4V alloy processed by high-pressure torsion
Authors: Zhang, W., Ding, H., Pereira, P.H.R., Huang, Y. and Langdon, T.G.
Journal: Materials Science and Engineering: A
Volume: 732
Pages: 398-405
ISSN: 0921-5093
DOI: 10.1016/j.msea.2018.07.010
Abstract:A cold-rolled Ti-6Al-4V alloy was subjected to consecutive heat treatments at 1283 K for 1 h and at 823 K for 3 h in order to produce a fully lamellar microstructure. Thereafter, the material was processed by high-pressure torsion (HPT) through various numbers of turns up to a maximum of 30. It is shown that the HPT processing leads to exceptional grain refinement with average grain sizes of ~ 70 and ~ 50 nm after 20 and 30 turns, respectively. Tensile testing was conducted at 873 and 923 K with different initial strain rates using the material processed through 20 turns of HPT and this gave a maximum superplastic elongation of 820% at the relatively low temperature of 923 K when testing with an initial strain rate of 5.0 × 10−4 s−1. The associated strain rate sensitivity for this low temperature superplasticity was estimated as m ≈ 0.5 which is consistent with flow by grain boundary sliding.
https://eprints.bournemouth.ac.uk/31195/
Source: Scopus
Grain refinement and superplastic flow in a fully lamellar Ti-6Al-4V alloy processed by high-pressure torsion
Authors: Zhang, W., Ding, H., Pereira, P.H.R., Huang, Y. and Langdon, T.G.
Journal: MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume: 732
Pages: 398-405
eISSN: 1873-4936
ISSN: 0921-5093
DOI: 10.1016/j.msea.2018.07.010
https://eprints.bournemouth.ac.uk/31195/
Source: Web of Science (Lite)
Grain refinement and superplastic flow in a fully lamellar Ti-6Al-4V alloy processed by high-pressure torsion
Authors: Zhang, W., Ding, H., Pereira, P.H.R., Huang, Y. and Langdon, T.G.
Journal: MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume: 732
Pages: 398-405
eISSN: 1873-4936
ISSN: 0921-5093
DOI: 10.1016/j.msea.2018.07.010
https://eprints.bournemouth.ac.uk/31195/
Source: Manual
Preferred by: Yi Huang
Grain refinement and superplastic flow in a fully lamellar Ti-6Al-4V alloy processed by high-pressure torsion
Authors: Zhang, W., Ding, H., Pereira, P.H.R., Huang, Y. and Langdon, T.G.
Journal: Materials Science and Engineering: A
Volume: 732
Issue: August
Pages: 398-405
ISSN: 0921-5093
Abstract:A cold-rolled Ti-6Al-4V alloy was subjected to consecutive heat treatments at 1283 K for 1 h and at 823 K for 3 h in order to produce a fully lamellar microstructure. Thereafter, the material was processed by high-pressure torsion (HPT) through various numbers of turns up to a maximum of 30. It is shown that the HPT processing leads to exceptional grain refinement with average grain sizes of ~ 70 and ~ 50 nm after 20 and 30 turns, respectively. Tensile testing was conducted at 873 and 923 K with different initial strain rates using the material processed through 20 turns of HPT and this gave a maximum superplastic elongation of 820% at the relatively low temperature of 923 K when testing with an initial strain rate of 5.0 × 10−4s−1. The associated strain rate sensitivity for this low temperature superplasticity was estimated as m ≈ 0.5 which is consistent with flow by grain boundary sliding.
https://eprints.bournemouth.ac.uk/31195/
Source: BURO EPrints