Detail publikace

Fatigue Life of 7475-T7351 Aluminum After Local Severe Plastic Deformation Caused by Machining

OHNIŠŤOVÁ, P. PÍŠKA, M. PETRENEC, M. DLUHOŠ, J. HORNÍKOVÁ, J. ŠANDERA, P.

Originální název

Fatigue Life of 7475-T7351 Aluminum After Local Severe Plastic Deformation Caused by Machining

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

The fatigue properties of thermo-mechanically treated and machined aluminum alloy 7475-T7351 have been studied. The applied advanced machining strategy induced intensive plastic deformation on the machined surface under defined cutting conditions. Therefore, a detailed study of 3D surface topography was performed. Advanced characterization of the material structure and electron back scattered diffraction mapping of selected chemical phases were performed, as well as energy dispersive X-ray analysis of the surface. Advanced mechanical properties of the material were investigated in situ with a scanning electron microscope that was equipped with a unique tensile fixture. The fatigue results confirmed an evident dispersion of the data, but the mechanism of crack nucleation was established. Fracture surface analysis showed that the cracks nucleated at the brittle secondary particles dispersed in the material matrix. The surface topography of samples that had been machined in wide range of cutting/deformation conditions by milling has not proved to be a decisive factor in terms of the fatigue behavior. The incoherent interface and decohesion between the alumina matrix and the brittle secondary phases proved to significantly affect the ultimate strength of the material. Tool engagement also affected the fatigue resistance of the material.

Klíčová slova

crack nucleation; fatigue; plastic deformation; surface topography

Autoři

OHNIŠŤOVÁ, P.; PÍŠKA, M.; PETRENEC, M.; DLUHOŠ, J.; HORNÍKOVÁ, J.; ŠANDERA, P.

Vydáno

3. 11. 2019

Nakladatel

MPDI

Místo

Basel

ISSN

1996-1944

Periodikum

Materials

Ročník

12

Číslo

21

Stát

Švýcarská konfederace

Strany od

1

Strany do

23

Strany počet

23

URL

https://www.mdpi.com/1996-1944/12/21/3605/htm

Plný text v Digitální knihovně

http://hdl.handle.net/11012/181103

BibTex

@article{BUT159700,
  author="Petra {Ohnišťová} and Miroslav {Píška} and Martin {Petrenec} and Jiří {Dluhoš} and Jana {Horníková} and Pavel {Šandera}",
  title="Fatigue Life of 7475-T7351 Aluminum After Local Severe Plastic Deformation Caused by Machining",
  journal="Materials",
  year="2019",
  volume="12",
  number="21",
  pages="1--23",
  doi="10.3390/ma12213605",
  issn="1996-1944",
  url="https://www.mdpi.com/1996-1944/12/21/3605/htm"
}