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Consolidation of Nanostructured Metal Powders Produced by Modulation-Assisted Machining

[+] Author Affiliations
James B. Mann

University of West Florida, Pensacola, FL

Christopher Saldana

Georgia Institute of Technology, Atlanta, GA

Srinivasan Chandrasekar

Purdue University, West Lafayette, IN

Paper No. MSEC2018-6621, pp. V002T04A029; 6 pages
doi:10.1115/MSEC2018-6621
From:
  • ASME 2018 13th International Manufacturing Science and Engineering Conference
  • Volume 2: Materials; Joint MSEC-NAMRC-Manufacturing USA
  • College Station, Texas, USA, June 18–22, 2018
  • Conference Sponsors: Manufacturing Engineering Division
  • ISBN: 978-0-7918-5136-4
  • Copyright © 2018 by ASME

abstract

In the present study, nanocrystalline aluminum alloy (Al3003-H14) particulate produced by modulation-assisted machining (MAM) is consolidated by indirect extrusion. The extrusion die was simultaneously heated below the critical time-temperature conditions for recrystallization. Experimental consolidation of platelet shaped particles showed a distinct elongation of grain size in the primary extrusion direction. Metallographic and transmission electron microscopy observations revealed ultrafine grained microstructure with grains having similar orientations across grain boundaries. The shear from indirect extrusion combined with the uniform distribution of alloy particulates by MAM provides a potential route for bulk consolidation of metals and alloys with ultra-fine grained microstructure.

Copyright © 2018 by ASME

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