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Microstructural behavior of rapidly solidified and extruded Al-14wt%Ni-14wt%Mm (Mm, misch metal) alloy powders by Soon Jik Hong; Taek-Soo Kim; Hyoung Seop Kim; Won Tae Kim; Byong Sun Chun is a Engineering article available to read on EtoBox.

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The effect of powder size on the microstructure and mechanical properties was studied in gas-atomized Al-14wt%Ni-14wt%Mm (Mm: misch metal) alloy powder and their extrudates. The alloy powders showed different microstructures depending on the powder size. With decreasing powder size, formation of intermetallic compounds such as Al 3 Ni, Al 11 Ce 3 and Al 11 La 3 was suppressed. The powders less than 26 mm in diameter consisted of nanocrystalline fcc-Al particles embedded in an amorphous matrix. Microstructural scale of the extruded bar decreased as the initial powder size was decreased. The ultimate tensile strength of the alloy bar has increased from about 512 to 728 MPa with decreasing initial powder size from 75 to 90 mm to -26 mm. The strength increase mainly results from structural refinement.

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Author

Soon Jik Hong; Taek-Soo Kim; Hyoung Seop Kim; Won Tae Kim; Byong Sun Chun

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0921-5093)

Published

1999

Language

EN

Field

Engineering (Physical Sciences)