Elastic and Plastic Deformation Behaviors of Lotus-Type Porous Copper

Masakazu Tane; Hideo Nakajima

doi:10.4028/www.scientific.net/MSF.658.332

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HomeMaterials Science ForumMaterials Science Forum Vol. 658Elastic and Plastic Deformation Behaviors of...

Elastic and Plastic Deformation Behaviors of Lotus-Type Porous Copper

Abstract:

The elastic and plastic deformation behaviors of lotus-type porous copper (lotus copper) with cylindrical pores oriented in one direction were investigated using two acoustic methods (resonant ultrasound spectroscopy and acoustic emission method). All the independent components of elastic stiffness were determined by resonant ultrasound spectroscopy combined with electromagnetic acoustic resonance method, which revealed that the Young’s modulus exhibits the anisotropy originating from the anisotropic porous structure and anisotropic matrix texture. The porosity dependence of the anisotropic Young’s modulus can be calculated by the micromechanics modeling based on effective-mean-field theory. The tensile deformation behavior of lotus copper was analyzed by acoustic emission method, which revealed that many burst acoustic emission signals are detected during the tensile deformation. This implies that many cracks are formed during the tensile deformation.

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Periodical:

Materials Science Forum (Volume 658)

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332-335

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.658.332

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July 2010

Authors:

Masakazu Tane, Hideo Nakajima

Keywords:

Acoustic Emission Method, Porous Metal, Resonant Ultrasound Spectroscopy

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