Microstructural evolution during mechanical milling of rapidly solidified Al-14Ni-14Mm alloy powders

    Authors

    S. J. Hong; T. S. Kim; C. Suryanarayana; D. H. Cho;B. S. Chun

    Comments

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    Abbreviated Journal Title

    J. Mater. Synth. Process

    Keywords

    microstructure; mechanical milling; Al-14Ni-14Mm; hardness; STRAIN-RATE SUPERPLASTICITY; FCC-AL PARTICLES; AMORPHOUS-ALLOYS; NI; MM; BEHAVIOR; STRENGTH; Materials Science, Multidisciplinary

    Abstract

    Microstructural evolution in gas-atomized Al-14 wt%Ni-14wt% Mm alloy powders was studied during mechanical milling. It was noted that the as-solidified particle size of 200 mum increases up to 72 h of milling and, subsequently, there was continuous refinement to 20 mum on milling to 200 h. Two microstructurally different zones-Zone A, which is featureless, and Zone B, which has the structure of the as-solidified powder-were noted. The thickness of the Zone A increased with increasing milling time at the expense of Zone B. Zone A was found to be much harder than Zone B and, consequently, crack formation, eventually leading to microstructural refinement, was observed to start in the relatively weaker Zone B.

    Journal Title

    Journal of Materials Synthesis and Processing

    Volume

    9

    Issue/Number

    1

    Publication Date

    1-1-2001

    Document Type

    Article

    Language

    English

    First Page

    39

    Last Page

    47

    WOS Identifier

    WOS:000170577500006

    ISSN

    1064-7562

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