Fatigue crack growth in SiC particle reinforced Al alloy matrix composites at high and low R-ratios by in situ X-ray synchrotron tomography

Peter Hruby, Sudhanshu S. Singh, Jason J. Williams, Xianghui Xiao, Francesco De Carlo, Nikhilesh Chawla

Research output: Contribution to journalArticle

25 Scopus citations

Abstract

Metal matrix composites (MMCs) offer high strength, high stiffness, low density, and good fatigue resistance, while maintaining cost an acceptable level. Fatigue resistance of MMCs depends on many aspects of composite microstructure. Fatigue crack growth behavior is particularly dependent on the reinforcement characteristics and matrix microstructure. The goal of this work is to obtain a fundamental understanding of fatigue crack growth behavior in SiC particle-reinforced 2080 Al alloy composites. In situ X-ray synchrotron tomography was performed on two samples at low (R = 0.1) and at high (R = 0.6) R-ratios. The resulting reconstructed images were used to obtain three-dimensional (3D) rendering of the particles and fatigue crack. Behaviors of the particles and crack, as well as their interaction, were analyzed and quantified. Four-dimensional (4D) visual representations were constructed to aid in the overall understanding of damage evolution.

Original languageEnglish (US)
Pages (from-to)136-143
Number of pages8
JournalInternational Journal of Fatigue
Volume68
DOIs
StatePublished - Nov 2014

Keywords

  • Fatigue
  • Metal-matrix composites (MMCs)
  • R-ratio
  • SiC particles
  • X-ray tomography

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Fatigue crack growth in SiC particle reinforced Al alloy matrix composites at high and low R-ratios by in situ X-ray synchrotron tomography'. Together they form a unique fingerprint.

  • Cite this