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Mechanical Properties of Lotus Metals and Alloys

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Porous Metals with Directional Pores

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Abstract

Many conventional porous materials possess almost nearly spherical pores and exhibit that those mechanical properties are usually isotropic. Moreover, the shape of pores is not always round and distorted so that the stress concentration takes place easily, which causes to weaken the strength of those materials. In addition, the overall uniformity of the pore size and the porosity is very crucial which may affect the stress concentration; some local strain under the stress is accumulated into the nonuniform region to degrade the materials strength. Thus, the foamed materials, cellular-structured materials, or sintered materials exhibit inferior mechanical properties.

Different from such conventional porous materials, lotus materials have elongated cylindrical pores aligned unidirectionally, and various mechanical properties are remarkably different from those of isotropic porous materials and show significant anisotropic behavior. Although the data on the mechanical properties of such anisotropic porous materials are not so much accumulated compared with the isotropic porous materials, it is at present good enough to review some systematic view of the mechanical properties of the lotus metals.

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Authors and Affiliations

  1. The Wakasa Wan Energy Research Center, Tsuruga, Japan

    Hideo Nakajima (Director)

  2. Osaka University, Suita, Japan

    Hideo Nakajima (Emeritus Professor)

Authors
  1. Hideo Nakajima
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  2. Hideo Nakajima
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Nakajima, H., Nakajima, H. (2013). Mechanical Properties of Lotus Metals and Alloys. In: Porous Metals with Directional Pores. Springer, Tokyo. https://doi.org/10.1007/978-4-431-54017-5_7

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