Characterization of high damping Fe-Cr-Mo and Fe-Cr-Al alloys for naval ships application
By: David Bruce Ferguson
Contributors: Naval Postgraduate School (U.S.)
Publisher: Naval Postgraduate School
Published: 1988
Place of publication: Monterey, California
Language: eng
Number of pages: 89
Subjects: Mechanical engineering
Description: 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.
Notes: Thesis advisor(s): Perkins, Jeffrey Arthur.

"March 1988."

Thesis (M.S. in M.E.)--Naval Postgraduate School, March 1988.

Includes bibliographical references.

Approved for public release, distribution unlimited.

US Navy (USN) author.