Publication detail

Cold Sprayed Deposits Characterized by Positron Annihilation Spectroscopy

ČÍŽEK, J. MEDŘICKÝ, J. ŠTEFÁNIK, F. LUKÁČ, F. ČUPERA, J. KONDAS, J. SINGH, R. MELIKHOVÁ, O. HRUŠKA, P. ČÍŽEK, J.

English title

Cold Sprayed Deposits Characterized by Positron Annihilation Spectroscopy

Type

journal article in Web of Science

Language

en

Original abstract

Cold spray (CS) is a rapid additive manufacturing method for deposition of metallic materials at rates significantly exceeding the laser-based methods, while retaining high deposit quality and low process cost. The mechanisms of the high-rate, extensive deformation of the materials in the CS process were recently intensively studied on macro- and meso-levels. In this paper, we introduce positron annihilation spectroscopy as a viable and reliable analytical method to study lattice defects created in the cold sprayed materials on the atomic-scale level. For the first demonstration, four different base metals were selected (Al, Cu, Ni, and Ti). A high density of dislocations was observed in all four deposits. In addition, deposits of fcc metals (Al, Cu, and Ni) also contain a considerable concentration of vacancy clusters. The results show that the extremely fast deformation in cold spray deposition process prevents recovery of vacancies which tend to agglomerate into clusters.

English abstract

Cold spray (CS) is a rapid additive manufacturing method for deposition of metallic materials at rates significantly exceeding the laser-based methods, while retaining high deposit quality and low process cost. The mechanisms of the high-rate, extensive deformation of the materials in the CS process were recently intensively studied on macro- and meso-levels. In this paper, we introduce positron annihilation spectroscopy as a viable and reliable analytical method to study lattice defects created in the cold sprayed materials on the atomic-scale level. For the first demonstration, four different base metals were selected (Al, Cu, Ni, and Ti). A high density of dislocations was observed in all four deposits. In addition, deposits of fcc metals (Al, Cu, and Ni) also contain a considerable concentration of vacancy clusters. The results show that the extremely fast deformation in cold spray deposition process prevents recovery of vacancies which tend to agglomerate into clusters.

Keywords in English

additive manufacturing; CSAM; dislocations; high strain rate deformation; kinetic deposition; positron annihilation; vacancies

Released

29.03.2024

Publisher

SPRINGER

Location

NEW YORK

ISSN

1059-9630

Volume

33

Number

2-3

Pages from–to

666–675

Pages count

10

BIBTEX


@article{BUT197246,
  author="Jan {Čížek} and Jan {Medřický} and Filip {Štefánik} and František {Lukáč} and Jan {Čupera} and Jan {Kondas} and Reeti {Singh} and Oksana {Melikhová} and Petr {Hruška} and Jakub {Čížek},
  title="Cold Sprayed Deposits Characterized by Positron Annihilation Spectroscopy",
  year="2024",
  volume="33",
  number="2-3",
  month="March",
  pages="666--675",
  publisher="SPRINGER",
  address="NEW YORK",
  issn="1059-9630"
}