Materials approaches to ship silencing
Perkins, Arthur Jeffery
Hills, Norman A.
Edwards, Glen Robert
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A survey of high-damping materials shows that two basic alloy systems, Ni-Ti and Cu-Mn, currently have been developed to the point of commercial availability and general engineering attractiveness. Alloys from both systems have the potential of wide application for noise/vibration reduction. The damping capacity of these "quiet metals" is so unusually high that new methods of design integration for noise reduction should be developed. The NPS research program in FY 74 has concentrated on the characterization of metallurgical factors (such as stress, deformation, and aging) affecting damping capacity in Cu-Mn-base alloys, and has studied the control of damping properties through thermomechanical processing. The program has also evaluated the effectiveness of various techniques to measure damping properties in highdamping alloys; torsion pendulum, resonant bar, and ultrasonic pulse-echo methods have been examined.
NPS Report NumberNPS-59Ps74061
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