title: A new insight into high-strength Ti62Nb12.2Fe13.6Co6.4Al5.8 alloys with bimodal microstructure fabricated by semi-solid sintering.
abstract: It is well known that semi-solid forming could only obtain coarse-grained microstructure in a few alloy systems with a low melting point, such as aluminum and magnesium alloys. This work presents that semi-solid forming could also produce novel bimodal microstructure composed of nanostructured matrix and micro-sized (CoFe)Ti2 twins in a titanium alloy, Ti62Nb12.2Fe13.6Co6.4Al5.8. The semi-solid sintering induced by eutectic transformation to form a bimodal microstructure in Ti62Nb12.2Fe13.6Co6.4Al5.8 alloy is a fundamentally different approach from other known methods. The fabricated alloy exhibits high yield strength of 1790 MPa and plastic strain of 15.5%. The novel idea provides a new insight into obtaining nano-grain or bimodal microstructure in alloy systems with high melting point by semi-solid forming and into fabricating high-performance metallic alloys in structural applications.
authors.affiliation: Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China.
authors.forename: L H
authors.initials: LH
authors.lastname: Liu
authors.affiliation: National Engineering Research Center of Near-net-shape Forming for Metallic Materials, South China University of Technology, Guangzhou 510640, China.
authors.forename: C
authors.initials: C
authors.lastname: Yang
authors.affiliation: National Engineering Research Center of Near-net-shape Forming for Metallic Materials, South China University of Technology, Guangzhou 510640, China.
authors.forename: L M
authors.initials: LM
authors.lastname: Kang
authors.affiliation: National Engineering Research Center of Near-net-shape Forming for Metallic Materials, South China University of Technology, Guangzhou 510640, China.
authors.forename: S G
authors.initials: SG
authors.lastname: Qu
authors.affiliation: National Engineering Research Center of Near-net-shape Forming for Metallic Materials, South China University of Technology, Guangzhou 510640, China.
authors.forename: X Q
authors.initials: XQ
authors.lastname: Li
authors.affiliation: National Engineering Research Center of Near-net-shape Forming for Metallic Materials, South China University of Technology, Guangzhou 510640, China.
authors.forename: W W
authors.initials: WW
authors.lastname: Zhang
authors.affiliation: National Engineering Research Center of Near-net-shape Forming for Metallic Materials, South China University of Technology, Guangzhou 510640, China.
authors.forename: W P
authors.initials: WP
authors.lastname: Chen
authors.affiliation: National Engineering Research Center of Near-net-shape Forming for Metallic Materials, South China University of Technology, Guangzhou 510640, China.
authors.forename: Y Y
authors.initials: YY
authors.lastname: Li
authors.affiliation: Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China.
authors.forename: P J
authors.initials: PJ
authors.lastname: Li
authors.affiliation: School of Engineering, Edith Cowan University, 270 Joondalup Drive, Joondalup, Perth, WA 6027, Australia.
authors.forename: L C
authors.initials: LC
authors.lastname: Zhang