Phase transformation during mechano-synthesis of nanocrystalline/amorphous Fe–32Mn–6Si alloys

Date
2013
Advisor
Instructor
Source Title
Materials Characterization
Print ISSN
1044-5803
Electronic ISSN
Publisher
Elsevier
Volume
84
Issue
Pages
169 - 174
Language
English
Type
Article
Journal Title
Journal ISSN
Volume Title
Abstract

Mechano-synthesis of Fe-32Mn-6Si alloy by mechanical alloying of the elemental powder mixtures was evaluated by running the ball milling process under an inert argon gas atmosphere. In order to characterize the as-milled powders, powder sampling was performed at predetermined intervals from 0.5 to 192 h. X-ray florescence analyzer, X-ray diffraction, scanning electron microscope, and high resolution transmission electron microscope were utilized to investigate the chemical composition, structural evolution, morphological changes, and microstructure of the as-milled powders, respectively. According to the results, the nanocrystalline Fe-Mn-Si alloys were completely synthesized after 48 h of milling. Moreover, the formation of a considerable amount of amorphous phase during the milling process was indicated by quantitative X-ray diffraction analysis as well as high resolution transmission electron microscopy image and its selected area diffraction pattern. It was found that the α-to-γ and subsequently the amorphous-to-crystalline (especially martensite) phase transformation occurred by milling development.

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Other identifiers
Book Title
Keywords
Fe-Mn-Si shape memory alloys, Mechanical alloying, Microstructure, Nanostructural/amorphous phase, Phase transformation, Argon gas atmospheres, Chemical compositions, Elemental powder mixture, Fe-mn-si shape memory alloys, Morphological changes, Nanostructural, Quantitative x ray diffraction, Selected area diffraction patterns, Argon, Ball milling, Cerium alloys, High resolution transmission electron microscopy, Manganese, Mechanical alloying, Microstructure, Milling (machining), Nanocrystalline alloys, Phase transitions, Powders, Scanning electron microscopy, Silicon, Silicon alloys, X ray powder diffraction, Iron alloys
Citation
Published Version (Please cite this version)