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Achieving simultaneously improved tensile strength and ductility of a nano-TiB 2 /AlSi10Mg composite produced by cold spray additive manufacturing

Abstract : The premature failure of components due to poor inter-particle bonding is the most critical issue in cold spray (CS) additive manufacturing. Herein, a hybrid strategy combining gas-atomization (involving in-situ reaction), CS, and post-friction stir processing was proposed to design a nano-TiB2/AlSi10Mg composite. Multiscale characterization in terms of X-ray diffraction and scanning and transmission electron microscopy was conducted to track microstructure evolution for understanding the mechanisms determining mechanical performance of the as-produced composites. The results showed simultaneous improvement in both ultimate tensile strength (365 ± 35 MPa) and ductility (16.0 ± 1.2 %), which represents a breakthrough. The strengthening and toughing mechanisms were attributed to the fine matrix grains with the significantly improved metallurgical inter-particle bonding, and the uniformly distributed TiB2 nanoparticles as reinforcement that was strongly bonded with the matrix (i.e. the formation of semi-coherent TiB2/Al interface). This study provides new guidance for hybrid additive manufacturing of metal matrix composites with high performance.
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https://hal.archives-ouvertes.fr/hal-03048663
Contributeur : Gang Ji <>
Soumis le : mercredi 9 décembre 2020 - 14:44:49
Dernière modification le : vendredi 8 janvier 2021 - 21:14:04
Archivage à long terme le : : mercredi 10 mars 2021 - 19:19:17

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Xinliang Xie, Chaoyue Chen, Zhe Chen, Wen Wang, Gang Ji, et al.. Achieving simultaneously improved tensile strength and ductility of a nano-TiB 2 /AlSi10Mg composite produced by cold spray additive manufacturing. Composites Part B: Engineering, Elsevier, 2020, Composites Part B: Engineering, 202, ⟨10.1016/j.compositesb.2020.108404⟩. ⟨hal-03048663⟩

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