Fatigue and Fracture Behavior of a Ca-Based Bulk-Metallic Glass (Postprint)

Abstract

The compression and fatigue behavior of a Ca65Mg15Zn20 bulk-metallic glass (BMG) was studied in air at room temperature. During the preparation of cubical samples of the Ca65Mg15Zn20 for compression and fatigue investigations, small spherical cavities were found. Under both monotonic and cyclic compression loadings of the samples, fractures initiated at these cavities and propagated in a direction generally parallel to the loading axis. Finiteelement analysis (FEA) was used to model the fracture behavior. The FEA of a centrally located spherical void showed that under compression loading, large tensile stresses evolved in the cavities. The orientation of the maximum principal stress (P1) was found to be normal to the direction of crack propagation, which is consistent with the experimental finding. Stresses in deeply embedded adjacent voids and those in superficial voids were also studied. The influence of the void location in the cubical sample on the fracture behavior was quantitatively discussed.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 2010
Accession Number
ADA617801

Entities

People

  • Daniel Miracle
  • G. Y. Wang
  • J. Raphael
  • Oleg N. Senkov
  • P. K. Liaw

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Biomedical

DTIC Thesaurus Topics

  • Air Force
  • Air Force Research Laboratories
  • Compression
  • Crack Propagation
  • Cracks
  • Elastic Properties
  • Engineering
  • Failure Mode And Effect Analysis
  • Finite Element Analysis
  • Governments
  • Materials
  • Mechanical Properties
  • Mechanics
  • Metallic Glass
  • Modulus Of Elasticity
  • Stresses
  • Tensile Stress

Fields of Study

  • Materials science

Readers

  • Explosive Engineering.
  • Powder metallurgy of Titanium alloys.
  • Structural Dynamics.