Impact of Equal Channel Angular Pressing on Mechanical Behavior and Corrosion Resistance of Hot-Rolled Ti-2Fe-0.1B Alloy

In the present study, the unique bimodal grain size distribution microstructure with the ultrafine substrate and embedded macro grains was fabricated by a traditional hot-rolling process in a novel low-cost Ti-2Fe-0.1B titanium alloy, which possesses a good combination of strength (around 663 MPa) a...

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Bibliographic Details
Published in:Materials 2020-11, Vol.13 (22), p.5117
Main Authors: Wang, Yanhuai, Li, Xin, Alexandrov, I V, Ma, Li, Dong, Yuecheng, Valiev, R Z, Chang, Hui, Zhang, Biao, Wang, Yuyang, Zhou, Lian, Hu, Zhiwei
Format: Article
Language:English
Subjects:
Corrosion resistance
Corrosion resistant alloys
Deformation
Ductility
Electrodes
Equal channel angular pressing
Grain boundaries
Grain size
Grain size distribution
Heat treatment
Hot rolling
Industrial applications
Investigations
Low cost
Mechanical properties
Microstructure
Reagents
Rolling resistance
Substrates
Tensile strength
Titanium alloys
Titanium base alloys
Ultrafines
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Summary:In the present study, the unique bimodal grain size distribution microstructure with the ultrafine substrate and embedded macro grains was fabricated by a traditional hot-rolling process in a novel low-cost Ti-2Fe-0.1B titanium alloy, which possesses a good combination of strength (around 663 MPa) and ductility (around 30%) without any post heat treatment. Meanwhile, the mechanical behavior and corrosion resistance of hot-rolled Ti-2Fe-0.1B alloy after equal channel angular pressing (ECAP) deformation were studied. Results indicated that the average grain size decreased to 0.24 μm after 4 passes ECAP deformation, which led to the enhancement of tensile strength to around 854 MPa and good ductility to around 15%. In addition, corrosion resistance was also improved after ECAP due to the rapid self-repairing and thicker passivation film. Our study revealed that the novel low-cost titanium alloy after hot-rolling and ECAP could be used instead of Ti-6Al-4V in some industrial applications due to similar mechanical behavior and better corrosion resistance.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma13225117