Journal
SCRIPTA MATERIALIA
Volume 193, Issue -, Pages 43-48Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2020.10.035
Keywords
Key Titanium alloys; Spark plasma sintering; Forging; Microstructure; Mechanical properties
Categories
Funding
- Special Project in Key-Area of the Colleges in Guangdong Province [2020ZDZX2072]
- National Natural Science Foundation of China [U19A2085, 51574128]
- Key Basic and Applied Research Program of Guangdong Province [2019B030302010]
- Key-Area Research and Development Program of Guangdong Province [2020B090923001]
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The study introduces a new methodology for preparing high-performance metallic alloys, and successfully demonstrates the exceptional mechanical properties of the Ti-6Al-4V alloy.
We report on a methodology of powder sintering and in-situ press forging, which can be used to ma-nipulate a new bimorphic microstructure in Ti-6Al-4V alloy. The microstructure contains typical triangle colonies with ultrafine lamellar alpha and 9, and their border areas with ultrafine equiaxed alpha, dispersed nano/ultrafine 9, as well as alpha/9 interface L layers. Surprisingly, the bimorphic alloy exhibits excellent mechanical properties under both tensile and compressive conditions, far superior to other Ti-6Al-4V alloys and their composites reported so far. Therefore, this innovative methodology provides a simple and economical method for preparing high-performance metallic alloys in structural applications. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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