On the Formation of Nanoscale Intergranular Intermetallic Compound Films in a Cu-5 at. pct Zr Alloy


Grain boundary structure and chemical composition have been shown to play important roles in plasticity, strength, creep, diffusivity, and conductivity of fine-grained metallic materials. Wetting of grain boundaries in metallic materials with nanoscale intergranular intermetallic compound films (NIICFs) is suggested to offer enhanced strength and ductility of alloys. In the current study, the NIICF wetting Cu-Zr micrograins of the matrix is observed in a Cu-5 at. pct Zr alloy produced by powder metallurgy. The underlying mechanism responsible for the formation of these NIICFs is discussed, and the effect of these films on the strength and strain-hardening capacity of the alloy is evaluated.

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D.S. Zhou acknowledges the financial support from the Natural Science Foundation of China (Grant No. 51701036) to this study. D.S. Zhou also wishes to extend his thanks to Mr. Yonghui Sun and Mr. Yu Dong for their help with STEM-HAADF characterization.

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Correspondence to Dengshan Zhou or Chao Yang.

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Manuscript submitted March 1, 2019.

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Zhou, D., Wang, H., Muránsky, O. et al. On the Formation of Nanoscale Intergranular Intermetallic Compound Films in a Cu-5 at. pct Zr Alloy. Metall Mater Trans A 50, 4569–4581 (2019). https://doi.org/10.1007/s11661-019-05360-4

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