Areal fatigue strength assessment of cast aluminium surface layers

Sebastian Pomberger, Michael Stoschka, Roman Aigner, Martin Leitner, Robert Ehart

Publikation: Beitrag in einer FachzeitschriftArtikel

Abstract

The fatigue strength of cast aluminium surface layers is significantly affected by casting imperfections. Experimental work reveals crack initiation due to three failure modes; microporosity, cast surface texture as well as a combination of both. A novel local sub-area evaluation of notch factors for surface texture characterisation utilises areal surface texture by pit depth values Svlocal, ranging within several hundred microns, and related notch root radii ρ‾ distributions. Additionally, the cast bulk strength is calculated by Murakami's approach. For all three failure cases, the presented holistic fatigue layer strength assessment methodology is well applicable for sand cast aluminium.
Originalspracheenglisch
Aufsatznummer105423
Seitenumfang11
FachzeitschriftInternational Journal of Fatigue
Jahrgang133
AusgabenummerApril
DOIs
PublikationsstatusVeröffentlicht - 2020
Extern publiziertJa

Schlagwörter

  • Areal roughness parameter
  • Cast aluminium surface layer
  • Fatigue strength
  • Porosity
  • Sub-area analysis

ASJC Scopus subject areas

  • !!Mechanics of Materials
  • !!Mechanical Engineering
  • !!Materials Science(all)
  • !!Industrial and Manufacturing Engineering
  • !!Modelling and Simulation

Dieses zitieren