Synthesis and characterization of nanocrystalline and amorphous (Al4Cu9)94.5Cr5.5 γ-brass alloy by rapid solidification and mechanical milling

N. K. Mukhopadhyay, D. Mukherjee, S. Dutta, R. Manna, D. H. Kim, I. Manna

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

An as-cast ingot was used for rapid solidification and high energy ball milling in order to synthesize amorphous and/or nanocrystalline (Al4Cu9)94.5Cr5.5 γ-brass alloy. Microstructure of the milled product has been characterized by X-ray diffraction, differential scanning calorimetry, high-resolution transmission electron microscopy and energy dispersive X-ray spectroscopy. Rapid solidification by melt spinning produces nanocrystalline aggregate of size ∼40 nm and mechanical milling of the alloy up to 50 h yields a composite microstructure comprising of amorphous and nanocrystalline phases, with crystallite size in the range of 15-25 nm. No other metastable phases have been identified. Attempts have been made to understand the possibility of formation of amorphous phase through mechanical milling using semi-empirical model of Miedema.

Original languageEnglish
Pages (from-to)177-184
Number of pages8
JournalJournal of Alloys and Compounds
Volume457
Issue number1-2
DOIs
Publication statusPublished - 2008 Jun 12

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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