High Damping Structural Materials.

Abstract

Damping capacity measurements on aluminum foam filled with epoxy confirmed previous finite element analysis which showed that a smaller phase size leads to lower damping. Studies of high temperature alloys in the Ti-Sn system based on the intermetallic compound Ti3Sn have identified high damping alloys. The low frequency damping behavior shows loss factors as high as 0.04 at room temperature. The damping is a function of temperature and frequency but does not vary much with strain. Zirconium and erbium modified Cu-Mn-Al was spray formed in an effort to increase homogeneity and damping capacity and decrease impurity levels. Although the microstructure revealed that the optimum spray forming parameters have not yet been achieved, the modified alloys showed both high damping and resistance to losing that damping capacity over time. The elemental additions also accelerated the formation of alpha manganese at the grain boundaries during aging.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1997
Accession Number
ADA323829

Entities

People

  • Catherine R. Wong

Organizations

  • Naval Surface Warfare Center Carderock Division

Tags

DTIC Thesaurus Topics

  • Alloys
  • Elements
  • Finite Element Analysis
  • Frequency
  • Grain Boundaries
  • Heat Resistant Alloys
  • High Temperature
  • Intermetallic Compounds
  • Materials
  • Resistance
  • Spray Forming

Fields of Study

  • Materials science

Readers

  • Control Systems Engineering.
  • Powder metallurgy of Titanium alloys.
  • Reinforced Composite Materials