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Title: Solid-state transformation of Fe-rich intermetallic phases in Al–5.0Cu–0.6Mn squeeze cast alloy with variable Fe contents during solution heat treatment

The Al–5.0 wt.% Cu–0.6 wt.% Mn alloys with a variable Fe content were prepared by squeeze casting. Optical microscopy (OM), Deep etching technique, scanning electron microscopy(SEM), X-ray diffraction (XRD) and transmission electron microscopy (TEM) were used to examine the solid-state transformation of Fe-rich intermetallics during the solution heat treatment. The results showed that the Chinese script-like α-Fe, Al{sub 6}(FeMn) and needle-like Al{sub 3}(FeMn) phases transform to a new Cu-rich β-Fe (Al{sub 7}Cu{sub 2}(FeMn)) phase during solution heat treatment. The possible reaction and overall transformation kinetics of the solid-state phase transformation for the Fe-rich intermetallics were investigated. - Graphical abstract: Display Omitted - Highlights: • The α-Fe, Al{sub 6}(FeMn) and Al{sub 3}(FeMn) phases change to the β-Fe phases. • Possible reactions of Fe phases during solution heat treatment are discussed. • The overall fractional transformation rate follows an Avrami curve.
Authors:
 [1] ;  [2] ;  [1] ; ;  [1]
  1. School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640 (China)
  2. (China)
Publication Date:
OSTI Identifier:
22476103
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Characterization; Journal Volume: 104; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINIUM COMPOUNDS; CASTING; COPPER COMPOUNDS; INTERMETALLIC COMPOUNDS; MANGANESE COMPOUNDS; PHASE TRANSFORMATIONS; SCANNING ELECTRON MICROSCOPY; SOLIDS; SOLUTION HEAT; TERNARY ALLOY SYSTEMS; TRANSFORMATIONS; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION