Cyclic Stress-Strain Behavior of Titanium in the Presence of Porosity

Abstract

The cyclic stress-strain behavior of powder-processed titanium containing 0.4 to 6.0 volume percent rounded porosity has been examined at room temperature. Total strain-range testing at small amplitudes such as 0.375% indicates that porosity has little influence on the cyclic hardening/softening response. However, at large total strain ranges such as 1.5% the cyclic flow behavior of the porous materials differs from that of fully dense titanium, behaving similarly to the pore-free material cycled at significantly higher strain amplitudes. The differences in cyclic flow behavior are believed to be a result of the locally large strain amplitudes induced adjacent to the pores. Determination of the cyclic strain-hardening exponents indicate no significant effect of porosity with n-values ranging from 0.24 to 0.28 for all of the materials examined. (JG)

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1989
Accession Number
ADA221775

Entities

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  • D. A. Gerard
  • Donald A. Koss

Organizations

  • Pennsylvania State University

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  • Engineering
  • Fatigue Life
  • Materials
  • Materials Engineering
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  • Mechanical Engineering
  • Mechanical Properties
  • Mechanical Working
  • Mechanics
  • Metallurgy
  • Military Research
  • Pennsylvania
  • Plastic Flow
  • Porous Materials
  • Powder Metallurgy
  • Strain Hardening
  • United States

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