Characterization of High Damping Fe-Cr-Mo and Fe-Cr-Al Alloys for Naval Ships Application.

Abstract

The metallurgical basis for high damping in Fe-Cr-based alloys was investigated. Two alloys similar to VACROSIL-010 were studied, with compositions of 84.7 Fe-11.44 Cr-2.91 A1 and 84.8 Fe-11.65 Cr-2.92 Mo. The strain dependence of specific damping capacity (SDC) was evaluated using a modified version of the resonant dwell technique. Heat treatment variations were introduced by annealing in argon gas at temperatures between 950 C and 1100 C and then furnace cooling. Cantilever beam specimens were evaluated for SDC at their first three resonant modes (0-1,000 Hz) at room temperature. Changes in damping capacity were correlated with the results of tensile hysteresis testing and dilatometry. Keywords: Damping; Ship silencing; Ferritic stainless steels.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1988
Accession Number
ADA194662

Entities

People

  • David B. Ferguson

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Engineered Resilient Systems
  • Ground and Sea Platforms
  • Sensors

DTIC Thesaurus Topics

  • Cantilever Beams
  • Chromium
  • Crystal Structure
  • Elements
  • Heat Treatment
  • Materials
  • Mechanical Engineering
  • Mechanical Properties
  • Mechanical Working
  • Metallurgy
  • Metals
  • Modulus Of Elasticity
  • Resonant Frequency
  • Stress Strain Relations
  • Stresses
  • Tensile Strength
  • Tensile Testing

Fields of Study

  • Materials science

Readers

  • Materials Science (Mechanical Engineering).
  • Metallurgy
  • Structural Dynamics.