Detail publikace

Effects of annealing temperature on microstructure and mechanical properties of cold sprayed AA7075

JUDAS, J. ZAPLETAL, J. ŘEHOŘEK, L. JAN, V.

Originální název

Effects of annealing temperature on microstructure and mechanical properties of cold sprayed AA7075

Typ

článek ve sborníku ve WoS nebo Scopus

Jazyk

angličtina

Originální abstrakt

This paper examines the softening behaviour of cold sprayed 7075 aluminum alloy after isothermal annealing. The as-received powder was deposited by a high-pressure cold spray device using heated nitrogen as propellant gas. To investigate the effects of post-deposition heat treatment, the excised samples were isochronally annealed in the temperature range of 200 to 400 °C. The feedstock powder and the free-standing coatings were initially characterized through various electron microscopy techniques (SEM, EDS, EBSD) and relevant microstructural features were determined. Mechanical properties of the as-sprayed and heat-treated samples were evaluated by quasi-static tensile and microhardness testing. It has been shown that extensive plastic deformation during cold spraying resulted in a dense coating with relatively low internal porosity. Specimens in an as-deposited state possessed a high level of strain hardening and exhibited a brittle rupture associated with intersplat cracking. When subjected to heat treatment, the cold spray deposits showed a general trend of microhardness reduction and progressive sintering of the microstructure with increasing annealing temperature. Furthermore, post-mortem observation revealed a gradual transition in fracture mechanism, manifested by improving material ductility and the occurrence of typical dimple morphology. The aspects responsible for the softening of the cold sprayed 7075 alloys are discussed further.

Klíčová slova

Cold Spray; 7075 aluminum alloy; isothermal annealing; tensile testing; electron microscopy

Autoři

JUDAS, J.; ZAPLETAL, J.; ŘEHOŘEK, L.; JAN, V.

Vydáno

1. 1. 2023

Nakladatel

Elsevier

ISSN

2452-3216

Periodikum

Procedia Structural Integrity

Ročník

43

Číslo

1

Stát

Italská republika

Strany od

160

Strany do

165

Strany počet

6

URL

https://www.sciencedirect.com/science/article/pii/S2452321622008150

Plný text v Digitální knihovně

http://hdl.handle.net/11012/244299

BibTex

@inproceedings{BUT183216,
  author="Jakub {Judas} and Josef {Zapletal} and Lukáš {Řehořek} and Vít {Jan}",
  title="Effects of annealing temperature on microstructure and mechanical properties of cold sprayed AA7075",
  booktitle="10th International Conference on Materials Structure and Micromechanics of Fracture",
  year="2023",
  journal="Procedia Structural Integrity",
  volume="43",
  number="1",
  pages="160--165",
  publisher="Elsevier",
  doi="10.1016/j.prostr.2022.12.252",
  issn="2452-3216",
  url="https://www.sciencedirect.com/science/article/pii/S2452321622008150"
}