The Effect of Heat Treatment and Cyclic Strain Amplitude on the Damping Properties of Iron-Chromium Based Alloys

Abstract

Fe-Cr-Al and Fe-Cr-Mo alloys are being studied for their high damping characteristics and possible utility to the Navy in the noise reduction and vibration control of shipboard machinery systems. This research studied the dependence of damping in these alloys on heat treatment and cyclic strain amplitude. Tensile specimens annealed at 900C and 1100C were subjected to cyclic axial loading at low strain levels on an MTS mechanical testing system, generating load-displacement hysteresis loops at various frequencies. These hysteresis loops were analyzed to determine the damping response at various levels of loading. Damping capacity is found to be dependent on both strain amplitude and frequency. A comparison is made between these results and previous work which evaluated the strain dependence of damping in these alloys using more conventional experimental methods. Keywords: Cyclic strain amplitude; Damping properties; Iron-Chromium based alloys; Heat treatment; Molybdenum; Aluminum.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1988
Accession Number
ADA197505

Entities

People

  • James L. Childs Jr.

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Energy and Power Technologies
  • Engineered Resilient Systems

DTIC Thesaurus Topics

  • Acquisition
  • Chromium
  • Crystal Structure
  • Data Acquisition
  • Engineering
  • Ferromagnetic Materials
  • Frequency
  • Heat Treatment
  • Magnetic Domains
  • Magnetic Fields
  • Materials
  • Measurement
  • Mechanical Engineering
  • Mechanical Working
  • Modulus Of Elasticity
  • Tensile Strength
  • United States

Fields of Study

  • Engineering
  • Materials science

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Structural Dynamics.
  • Thin Film Deposition Science.