Structure Change and Improvement of the Mechanical Properties of Lotus-Type Porous Copper by ECAE Process

Juan Lobos; Shinsuke Suzuki; Hiroshi Utsunomiya; Hideo Nakajima

doi:10.4028/www.scientific.net/MSF.620-622.757

Paper Titles

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Research on Physical and Mechanic Properties of Green-Growing Porous Concrete for Ecological Slope Protection
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Porous Silicon Nitride Ceramics Prepared by Reduction – Nitridation of Diatomite
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Structure Change and Improvement of the Mechanical Properties of Lotus-Type Porous Copper by ECAE Process
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Fabrication and Properties of Pressureless Sintered Si₃N₄/BN Composite Ceramics with La₂O₃-Al₂O₃-Y₂O₃ as Sintering Additives
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A Novel Method for the Preparation of Porous SiC
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HomeMaterials Science ForumMaterials Science Forum Vols. 620-622Structure Change and Improvement of the Mechanical...

Structure Change and Improvement of the Mechanical Properties of Lotus-Type Porous Copper by ECAE Process

Abstract:

Deformation behavior of lotus-type porous copper with long cylindrical pores aligned in one direction through equal-channel angular extrusion (ECAE) process was investigated using a die with channel angle of 150º. Although the density slightly increased after every pass, the porous structure remains in the process. The Vickers hardness and the compressive yield strength of lotus copper increased through the ECAE process. The compressive yield strength after 3 passes increased up to 10 times larger than that before processing. The deformation of lotus copper takes place by buckling and the shearing of the cell walls. The increase in hardness is considered to be caused by work hardening.