Noise Abatement and Internal Vibrational Absorption in Potential Structural Materials
Abstract
Efforts were directed toward identifying potential structural materials which combine high strength with damping characteristics in the audible range. The range of yield strengths and loss factors which are attainable exceed currently available commercial materials. Measurements of the enthalpy of transformation in a thermoelastic Cu-Al-Ni alloy has been conducted over a range of grain size and sample size to assess the stored elastic strain energy. Studies of the magnetic domain wall configuration in a cobalt-iron alloy have been carried out to evaluate the contribution of domains to damping in this alloy. The hull of a one-sixth scale dynamic model of an armoured personnel carrier was fabricated from a high-damping iron-chromium-aluminum alloy and was evaluated over a range of vibrational frequencies simulating operation. A torpedo propeller was cast from a high damping cobalt-iron alloy and evaluated in underwater vibration tests.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1977
- Accession Number
- ADA040029
Entities
People
- L. Kaufman
- P. P. Neshe
- S. A. Kulin