High ductility induced by twin-assisted grain rotation and merging in solid-state cold spray additive manufactured Cu

Wenya Li, Jingwen Yang, Zhengmao Zhang, Yingchun Xie, Chunjie Huang

Research output: Contribution to journalLetterpeer-review

10 Scopus citations

Abstract

In contrast to fusion-based additive manufacturing (AM) methods, cold spray (CS) is a solid-state metal powder deposition process that has evolved from a traditional coating method to a novel AM technique, i.e. CSAM, for fabricating components and repairing damaged parts. In this study, we demonstrate that the long-standing low ductility of CSAM metallic deposits can be addressed through constructing a unique microstructure. A Cu deposit with 29.7% in elongation and 270 MPa in tensile strength has been produced using a proper spray parameter set. The high ductility of the Cu deposit originates from grain rotation and merging during tensile deformation, which is facilitated by twin boundaries acting as a bridge to dislocations slip. The understanding of high-ductility Cu deposits may help develop other high-strength and high-ductility CSAM metallic materials.

Original languageEnglish
Pages (from-to)11-15
Number of pages5
JournalJournal of Materials Science and Technology
Volume214
DOIs
StatePublished - 10 Apr 2025

Keywords

  • Cold spray additive manufacturing
  • Copper
  • Grain growth
  • High ductility
  • Twin

Fingerprint

Dive into the research topics of 'High ductility induced by twin-assisted grain rotation and merging in solid-state cold spray additive manufactured Cu'. Together they form a unique fingerprint.

Cite this