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RSS FeedsMaterials, Vol. 8, Pages 914-931: Characterization of Low-Symmetry Structures from Phase Equilibrium of Fe-Al System--Microstructures and Mechanical Properties (Materials)

 
 

4 march 2015 13:17:02

 
Materials, Vol. 8, Pages 914-931: Characterization of Low-Symmetry Structures from Phase Equilibrium of Fe-Al System--Microstructures and Mechanical Properties (Materials)
 


Fe-Al intermetallic alloys with aluminum content over 60 at% are in the area of the phase equilibrium diagram that is considerably less investigated in comparison to the high-symmetry Fe3Al and FeAl phases. Ambiguous crystallographic information and incoherent data referring to the phase equilibrium diagrams placed in a high-aluminum range have caused confusions and misinformation. Nowadays unequivocal material properties description of FeAl2, Fe2Al5 and FeAl3 intermetallic alloys is still incomplete. In this paper, the influence of aluminum content and processing parameters on phase composition is presented. The occurrence of low-symmetry FeAl2, Fe2Al5 and FeAl3 structures determined by chemical composition and phase transformations was defined by scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) examinations. These results served to verify diffraction investigations (XRD) and to explain the mechanical properties of cast materials such as: hardness, Young`s modulus and fracture toughness evaluated using the nano-indentation technique.


 
106 viewsCategory: Chemistry, Physics
 
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