首页|Mechanical property and microstructure of in-situ TiB/Ti composites via vacuum sintering and hot rolling
Mechanical property and microstructure of in-situ TiB/Ti composites via vacuum sintering and hot rolling
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NSTL
Elsevier
? 2022 Elsevier B.V.High-plasticity in-situ TiB/Ti matrix composites (TMCs) are fabricated by in-situ reaction between Ti and ZrB2 powder during vacuum sintering followed by hot rolling. Uniform microstructure is observed in the TMCs with obvious grain refinement. Compared with pure titanium, the mean grain size of Ti-2.0 wt% ZrB2 composite significantly decreases from 50.7 μm to 17.5 μm, decreasing by 65%. Accordingly, Ti-2.0 ZrB2 composite displays outstanding mechanical properties of 734.6 MPa in ultimate tensile strength, 579.0 MPa in yield strength, 21.4% in elongation, while these values of pure Ti are 632.4 MPa, 507.0 MPa, and 14.2%, respectively. The strength improvement of TMCs can be mainly attributed to five parts: grain refinement, solid solution strengthening, load transfer mechanism, CTE mismatch between TiB and Ti matrix and the dislocation substructure hardening. Among them, dislocation substructure hardening (more than 50% of the total improvement) takes the dominant position in strength increment in the as-rolled TiB/Ti matrix composites.
High plasticityMechanical propertyPowder metallurgyTitanium borideTitanium matrix composite
Zhou Y.、Yang F.、Chen C.、Shao Y.、Lu B.、Guo Z.、Sui Y.
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Institute for Advanced Materials and Technology University of Science and Technology Beijing Beijing 100083 China & Shunde Graduate School of University of Science and Technology Beijing
Innovation Group of Marine Engineering Materials and Corrosion Control Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai)
NSTL
Elsevier
