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Microstructural Evolution during Mechanical Milling of Rapidly Solidified Al–14Ni–14Mm1 Alloy Powders

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Journal of Materials Synthesis and Processing

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 μm increases up to 72 h of milling and, subsequently, there was continuous refinement to 20 μm 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.

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Authors and Affiliations

  1. Rapidly Solidified Materials Research Center (RASOM), Chungnam National University, Taedok Science Town, Taejon, 305-764, South Korea

    Soon Jik Hong, Taek Soo Kim & Byong Sun Chun

  2. Department of Mechanical, Materials and Aerospace Engineering, University of Central Florida, Orlando, Florida

    C. Suryanarayana

  3. Department of Metallurgical Engineering, Hanbat National University, Yuseong, Taejon, 305-719, South Korea

    Duck-Ho Cho

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  1. Soon Jik Hong
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  2. Taek Soo Kim
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  3. C. Suryanarayana
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  4. Duck-Ho Cho
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  5. Byong Sun Chun
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Correspondence to C. Suryanarayana.

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Hong, S.J., Kim, T.S., Suryanarayana, C. et al. Microstructural Evolution during Mechanical Milling of Rapidly Solidified Al–14Ni–14Mm1 Alloy Powders. Journal of Materials Synthesis and Processing 9, 39–47 (2001). https://doi.org/10.1023/A:1011386615305

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