Accession Number : ADA194662


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


Descriptive Note : Master's thesis,


Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA


Personal Author(s) : Ferguson, David B


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a194662.pdf


Report Date : Mar 1988


Pagination or Media Count : 100


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.


Descriptors :   *FERRITES , *NOISE REDUCTION , *STAINLESS STEEL , *STEEL , ANNEALING , ARGON , BEAMS(STRUCTURAL) , CANTILEVER BEAMS , COOLING , DAMPING , DILATOMETERS , DWELL TIME , HYSTERESIS , MILITARY APPLICATIONS , NAVAL VESSELS , RESONANCE , SHIP NOISE , TENSILE TESTERS , CHROMIUM , MOLYBDENUM , ALUMINUM , SHIP NOISE , FERROMAGNETIC MATERIALS , HEAT TREATMENT , THESES


Subject Categories : Properties of Metals and Alloys
      Acoustics


Distribution Statement : APPROVED FOR PUBLIC RELEASE