Cyclic plasticity at pores and inclusions in cast Al-Si alloys

Journal Article (Journal Article)

Finite element analyses of micronotches including pores and silicon particles of an A356 aluminum alloy were performed to elucidate microstructure-property relations for fatigue crack incubation. Several important findings resulted. By varying the particle and pore size, spacing, aspect ratio, and clustering, the relative microstructural differences were quantified related to micronotch root cyclic plasticity. Results from realistic two-dimensional microstructures showed that minimal microstructure-scale cyclic plasticity corresponds well to the measured fatigue strength at 107 cycles for low porosity A356 aluminum alloy specimens. "Realistic" and idealized particles/pores simulations were used to formulate a local Coffin-Manson type law for crack incubation. © 2002 Elsevier Science Ltd. All rights reserved.

Full Text

Duke Authors

Cited Authors

  • Fan, J; McDowell, DL; Horstemeyer, MF; Gall, K

Published Date

  • January 1, 2003

Published In

Volume / Issue

  • 70 / 10

Start / End Page

  • 1281 - 1302

International Standard Serial Number (ISSN)

  • 0013-7944

Digital Object Identifier (DOI)

  • 10.1016/S0013-7944(02)00097-8

Citation Source

  • Scopus