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

Materials

Zhiwei Hu¹  Lian Zhou²  Yanhuai Wang²  Hui Chang²  Yuecheng Dong²  Biao Zhang²  Yuyang Wang²  I.V. Alexandrov³  Xin Li⁴  R.Z. Valiev⁵  Li Ma⁶ 

[1] College of 2011, Nanjing Tech University, Nanjing 211816, China;College of Materials Science and Engineering/Tech Institute for Advanced Materials, Nanjing Tech University, Nanjing 211816, China;Department of Physics, Ufa State Aviation Technical University, 450008 Ufa, Russia;Huaneng Fuzhou Power Plant, Fuzhou 350200, China;Institute of Physics and Advanced Materials, Ufa State Aviation Technical University, 450008 Ufa, Russia;State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute (LSMRI), Qingdao 266237, China;

关键词: equal channel angular pressing;    ultrafine-grained;    Ti-2Fe-0.1B alloy;    mechanical behavior;    corrosion resistance;   

DOI  :  10.3390/ma13225117

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown