Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 767, Issue -, Pages 617-621Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2018.07.141
Keywords
Titanium alloy; Ti-6Al-4V; Mechanical properties; Microstructure
Categories
Funding
- SKPBRC [2013CB733000]
- NSFC [51434008/51531005/51571174/51705345]
- Natural Science Foundation for Distinguished Young Scholars of Hebei Province of China [E2016203376]
- Natural Science Foundation of Hebei Province of China [E2017210050/E2017210054]
- Natural Science Foundation of Hebei Provincial Department of Education [QN2017133]
- Open Foundation of State Key Laboratory of Metastable Materials Science and Technology [201607]
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Combined with the decomposition of martensitic phase and the globularization of close-packed hexagonal alpha phase, TC4 alloy with ultrafine duplex microstructure and excellent mechanical properties is prepared by using a novel thermo-mechanical technique of plastic deformation and aging treatment. The dual phase of alpha and martensitic is obtained by quenching from alpha+beta phase region. Then, the ultrafine equiaxial microstructure is come from the globularization of deformed alpha phase, and the ultrafine acicular microstructure forms by the decomposition of deformed martensitic phase during aging treatment. Compared with lath microstructure, equiaxial microstructure and coarse duplex microstructure, the ultrafine duplex microstructure of TC4 alloy possesses ultrahigh strength of 1350 MPa and good elongation of 11%. (C) 2018 Elsevier B.V. All rights reserved.
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