Ultrasonic characterization of cellular metal structures
作者： Douglas T Queheillalt , David J Sypeck , Haydn N.G Wadley
DOI: 10.1016/S0921-5093(01)01357-0
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摘要: Abstract A new class of cellular materials synthesized by partially consolidating hollow metal powders has been gaining interest for multi-functional applications (where load support combined with other functionalities such as acoustic damping, thermal insulation or energy storage is required). These depend upon the volume fraction porosity, type (open/closed) and pore size. The independent controllable fraction, size open closed porosity these structures offers possibility tailoring a properties to specific applications. Here, elastic stiffness attenuation highly porous made from gas atomized superalloy spheres have measured. Young's shear moduli were deduced ultrasonic wave velocities while was evaluated temporal decay laser induced standing waves. varied scaled unique attributes powder offer potential tailor their individual thereby exploiting nature structures.
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