High-tensile-strength and ductile novel Ti-Fe-N-B alloys reinforced with TiS nanowires

Huang, Liqing and Qian, Ma and Wang, Lihua and Chen, Zhi-Gang and Shi, Zhiming and Nguyen, Van and Zou, Jin (2017) High-tensile-strength and ductile novel Ti-Fe-N-B alloys reinforced with TiS nanowires. Materials Science and Engineering A, 708 . pp. 285-290. ISSN 0921-5093


In this study, we designed and fabricated high-performance Ti-Fe-N-B alloys by sintering a blend of Ti powder, Fe powder and BN nanopowder using spark plasma sintering. During sintering, TiB nanowires nucleated from the surfaces of Ti powder particles on which the BN nanoparticles were dispersed, and then grew into the nearby Ti matrix forming a three-dimensional (3D) network-woven architecture throughout the Ti matrix. The TiB nanowires were about 10-30 mu m in length and 50-200 nm in diameter after sintering. Their existence suppressed the formation of the continuous alpha-Ti phase along the beta-Ti grain boundaries and refined the microstructure of the Ti matrix. A large quantity of alpha-Ti nanoplates precipitated along the planes (110)(beta.Ti) in the Ti-Fe-N-B alloys. The as-sintered Ti-4.5Fe-0.14N-0.11B alloy achieved a high tensile strength of 1176 MPa with a significant tensile elongation of 10.4%, which satisfied the requirements for the tensile properties of mill-annealed Ti6Al4V in the solution-treated and aged (STA) condition. The TiB nanowires, alpha-Ti nanoplates, Fe solute atoms, and N solute atoms in the matrix all contributed to the high tensile strength.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to Published version, in accordance with the copyright policy of the publisher.
Faculty / Department / School: No Faculty
Date Deposited: 26 Feb 2018 04:14
Last Modified: 08 May 2018 04:45
Uncontrolled Keywords: titanium alloys; alloy design; TiB nanowires; spark plasma sintering; tensile properties
Fields of Research : 09 Engineering > 0912 Materials Engineering > 091207 Metals and Alloy Materials
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
Funding Details:
Identification Number or DOI: 10.1016/j.msea.2017.09.136
URI: http://eprints.usq.edu.au/id/eprint/33774

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