Imperial College London
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ProfessorDavidDye

Faculty of Engineering, Department of Materials

Professor of Metallurgy
 
 
 
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Contact

 

+44 (0)20 7594 6811david.dye

 
 
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Location

 

1.09GoldsmithSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Gao:2018:10.1038/s41598-018-25899-3,
author = {Gao, J and Nutter, J and Liu, X and Guan, D and Huang, Y and Dye, D and Rainforth, WM},
doi = {10.1038/s41598-018-25899-3},
journal = {Scientific Reports},
title = {Segregation mediated heterogeneous structure in a metastable β titanium alloy with a superior combination of strength and ductility},
url = {http://dx.doi.org/10.1038/s41598-018-25899-3},
volume = {8},
year = {2018}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - In β titanium alloys, the β stabilizers segregate easily and considerable effort has been devoted to alleviate/eliminate the segregation. In this work, instead of addressing the segregation problems, the segregation was utilized to develop a novel microstructure consisting of a nanometre-grained duplex (α+β) structure and micrometre scale β phase with superior mechanical properties. An as-cast Ti-9Mo-6W alloy exhibited segregation of Mo and W at the tens of micrometre scale. This was subjected to cold rolling and flash annealing at 820 oC for 2 and 5 mins. The solidification segregation of Mo and W leads to a locally different microstructure after cold rolling (i.e., nanostructured β phase in the regions rich in Mo and W and plate-like martensite and β phase in regions relatively poor in Mo and W), which play a decisive role in the formation of the heterogeneous microstructure. Tensile tests showed that this alloy exhibited a superior combination of high yield strength (692 MPa), high tensile strength (1115 MPa), high work hardening rate and large uniform elongation (33.5%). More importantly, the new technique proposed in this work could be potentially applicable to other alloy systems with segregation problems.
AU  - Gao,J
AU  - Nutter,J
AU  - Liu,X
AU  - Guan,D
AU  - Huang,Y
AU  - Dye,D
AU  - Rainforth,WM
DO  - 10.1038/s41598-018-25899-3
PY  - 2018///
SN  - 2045-2322
TI  - Segregation mediated heterogeneous structure in a metastable β titanium alloy with a superior combination of strength and ductility
T2  - Scientific Reports
UR  - http://dx.doi.org/10.1038/s41598-018-25899-3
UR  - http://hdl.handle.net/10044/1/59305
VL  - 8
ER  -
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