Microparticle impact-bonding modes for mismatched metals: From co-deformation to splatting and penetration

Mostafa Hassani*, David Veysset, Yuchen Sun, Keith A. Nelson, Christopher A. Schuh

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

31 Scopus citations


We present a comprehensive experimental campaign of high-velocity microparticle impacts with different combinations of particle and substrate materials to identify possible deformation regimes. Based on experimental observations of the impact sites, we identify three typical modes of behavior, namely, splatting, co-deformation, and penetration. We develop a theoretical framework to predict the operative regime for a given particle/substrate combination, ranging from splatting and penetration at two extremes of a spectrum, and co-deformation in the center. We propose an impact ratio based on the materials’ properties, which can successfully quantify the spectrum. Co-deformation is expected when the ratio is around unity, while much larger or smaller ratios give rise to penetration and splatting, respectively.

Original languageEnglish (US)
Pages (from-to)480-494
Number of pages15
JournalActa Materialia
StatePublished - Oct 15 2020


  • Cold spray
  • Flattening
  • High-velocity impact
  • Impact bonding
  • Impact morphology
  • Penetration

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys


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