On the Enhanced Deformability of Brittle Intermetallics Through the Design of Heterogeneous Multi-layered Structure


Industrial manufacturing, forming, and application of brittle materials such as Ti3Al intermetallic compounds are influenced by their poor plastic deformability. For evading such a dilemma, we propose a heterogeneous design strategy and fabricated macroscopically multi-layered composites with microscopically compositional gradients. In situ tension and in situ tracking of local strain evolution demonstrate that extremely brittle Ti3Al after being embedded into heterogeneous laminated composites can plastically deform at room temperature, even approaching 27.5 pct at 600 °C.

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This work was financially supported by the National Natural Science Foundation of China (Grant Nos. 51701081, 51872118), the Young-aged Talents Lifting Project from Shandong Association for Science & Technology (Grant No. 301-1505001, recoded by University of Jinan), the Shandong Provincial Natural Science Foundation, China (Grant Nos. ZR2017BEM001, ZR2018PEM008), and the Key Research and Development Program of Shandong Province (Grant No. 2019GGX104077).

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Correspondence to Hao Wu or Zhi Wang.

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Manuscript submitted May 18, 2019.

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Wu, H., Liu, Z., Hu, H. et al. On the Enhanced Deformability of Brittle Intermetallics Through the Design of Heterogeneous Multi-layered Structure. Metall Mater Trans A 50, 5561–5566 (2019). https://doi.org/10.1007/s11661-019-05477-6

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