Revealing the mechanism of extraordinary ductility in the 75W-25Cu composite at elevated temperatures
Description
The density of the 75W-25Cu composite is measured using Archimedes' immersion method in anhydrous ethanol. In Fig.1, The SEM images show the content and phase distribution of the initial 75W-25Cu composite. The Fig.2 shows the tensile properties of 75W-25Cu composite at ambient and elevated temperatures. Fig.3 is the fracture morphology of 75W-25Cu composite at 25 ℃, 200 ℃ and 1000 ℃. In Figs.4-6, EBSD, TEM and ECCI are conducted to investigate the mechanism of the atypical increase of the fracture strain at 200 ℃. Fig.7 shows the stress and strain partitioning between the W and Cu phases. The high-temperature mechanical properties of W-Cu composites are summarized in Fig.8.
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Funding
National Natural Science Foundation
No.52103358
National Natural Science Foundation
No.52301126
Natural Science Foundation of Jiangsu Province
No. BK20210726
Science Center for Gas Turbine Project
No. P2021-A-Ⅳ-001-003
Career Development Fund
No. C222812017
Young Individual Research Grant
No. M22K3c0096