Title

High-strength ultrafine-grained titanium-based alloys with large plasticity

Document Type

Book Chapter

Publisher

Nova Science Publishers

Faculty

Faculty of Health, Engineering and Science

School

School of Engineering

RAS ID

15872

Comments

This chapter was originally published as: Zhang, L. (2013). High-strength ultrafine-grained titanium-based alloys with large plasticity. In L. Zhang, and C. Yang (Eds.). Titanium alloys: Formation, characteristics and industrial applications (pp. 275-302). Hauppauge, NY: Nova Science Publishers. Original book available here

Abstract

In order to simultaneously enhance the strength and plasticity in nanostructured / ultrafine-grained alloys, a strategyof formation of multiple length-scale microstructure (or called bimodal composite microstructure) has been developed recently. This chapter gives a brief overview of the alloy development, microsctructure properties relationship, and deformation behavior innanostructured / ultrafine-grained Ti-Fe-based alloys obtained through a simple single-step solidification process. In geneal, different lengthscale phases, i.e. micrometer-sized primary phases (dendrites or eutectic) embedded in an nanostructured / ultrafine-grained eutectic matrix, are formed in the as-cast Ti-Fe-based alloy systems. These as-prepared nanostructured / ultrafine-grained Ti-Fe-based materials exhibit an excellent combination of strength and plasiticity, i.e. high strength of exceeding 2000 MPa, large plasticity up to 20% and high specific strength. The relationship between microstructural charactersitcsand the mechanical behavior and plastic deformation behavior in the nanostructured / ultrafine-grained Ti-Fe-based alloys have been detailed discussed.

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