The effect of heat treatment and cyclic strain amplitude on the damping properties of iron-chromium alloys
Childs, James L.
Perkins, Jeffrey Arthur
MetadataShow full item record
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; Theses. (jes)
Approved for public release; distribution is unlimited
Showing items related by title, author, creator and subject.
Cronauer, Joseph T. (1987);The strain dependence and temperature dependence of damping in the thermoelastic martensitic (shape memory) alloys titanium-nickel and copper-zinc-aluminum was compared to predetermined optimum damping behavior in the ...
Ferguson, David Bruce (Monterey, California. Naval Postgraduate School, 1988-03);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 ...
Effects of precipitate size and surface normal orientation on micro-identification and compressive fatigue of NiTi shape memory alloys Juntunen, Kevin K. (2001);This work seeks to determine the evolution of the indentation and fatigue response of heat-treated Nickel-Titanium shape memory alloys over a range of precipitate sizes and surface normal orientations. Various tests were ...