Strengthening of lotus-type porous copper by ECAE process

J. Lobos, Shinsuke Suzuki, H. Utsunomiya, H. Nakajima, M. A. Rodrigez-Perez

    Research output: Contribution to journalArticle

    11 Citations (Scopus)

    Abstract

    Lotus-type porous copper with directional cylindrical pores was fabricated by unidirectional solidification in a pressurized hydrogen atmosphere. Improvements in microstructure and mechanical properties of the lotus-type porous copper by equal-channel angular extrusion (ECAE) were investigated using a die with a channel angle of 150°. The porosity decreases with increasing pass number, and decreases from 46% to 30% by four passes. It means that pore closure in the ECAE process is not significant. Both the specific compressive yield strength σ0.2% and the Vickers hardness HV of the lotus copper increase with increasing pass number of ECAE. The ECAE processed porous copper shows improved σ0.2% and HV comparable to those of the extruded nonporous copper. It is suggested that ECAE is a promising method to strengthen porous metals without significant pore closure.

    Original languageEnglish
    Pages (from-to)2007-2011
    Number of pages5
    JournalJournal of Materials Processing Technology
    Volume212
    Issue number10
    DOIs
    Publication statusPublished - 2012 Oct

    Fingerprint

    Extrusion
    Strengthening (metal)
    Strengthening
    Copper
    Closure
    Decrease
    Vickers hardness
    Solidification
    Porosity
    Hardness
    Hydrogen
    Mechanical Properties
    Atmosphere
    Yield stress
    Microstructure
    Die
    Metals
    Angle
    Mechanical properties

    Keywords

    • Equal-channel angular extrusion
    • Lotus-type porous copper
    • Porous metals
    • Vickers hardness
    • Yield strength

    ASJC Scopus subject areas

    • Computer Science Applications
    • Modelling and Simulation
    • Ceramics and Composites
    • Metals and Alloys
    • Industrial and Manufacturing Engineering

    Cite this

    Strengthening of lotus-type porous copper by ECAE process. / Lobos, J.; Suzuki, Shinsuke; Utsunomiya, H.; Nakajima, H.; Rodrigez-Perez, M. A.

    In: Journal of Materials Processing Technology, Vol. 212, No. 10, 10.2012, p. 2007-2011.

    Research output: Contribution to journalArticle

    Lobos, J. ; Suzuki, Shinsuke ; Utsunomiya, H. ; Nakajima, H. ; Rodrigez-Perez, M. A. / Strengthening of lotus-type porous copper by ECAE process. In: Journal of Materials Processing Technology. 2012 ; Vol. 212, No. 10. pp. 2007-2011.
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