Thermodynamic Assessment of the Aluminum Corner of the Al-Fe-Mn-Si System

Abstract

A new assessment of the aluminum corner of the quaternary Al-Fe-Mn-Si system has been made that extends beyond the COST-507 database. This assessment makes use of a recent, improved description of the ternary Al-Fe-Si system. In the present work, modeling of the Al-rich corner of the quaternary Al-Fe-Mn-Si system has been carried out by introducing Fe solubility into the so-called alpha-AlMnSi and beta-AlMnSi phases of the Al-Mn-Si system. A critical review of the data available on the quaternary system is presented and used for the extension of the description of these ternary phases into the quaternary Al-Fe-Mn-Si.

Differential Thermal Analysis Assessment of Beta Phase Precipitation in Al-6.5Si-1Fe Alloy

“…This difference is certainly due to the DTA cell, and all temperature should be increased by 5°C. The liquidus of the alloy is thus experimentally found at 616°C which is close to the value of 617.6°C that can be calculated according to a previous assessment [9].…”

“…Its skeleton appearance is similar to that reported for alpha phase (Al 8 Fe 2 Si). Figure 5 shows the calculated liquidus projection of the Al-Fe-Si phase diagram [9]. The calculated solidification path of the investigated alloy has been superimposed (bold line), it is the same for lever rule and Scheil's model.…”

Understanding the Thermodynamics and Crystal Structure of Complex Fe Containing Intermetallic Phases Formed on Solidification of Aluminium Alloys

“…All of the published critical assessments of data for the system are largely based on the results of the COST507 European research programme. [8][9][10][11] However, most of this work was carried out before reliable software and computer power made it possible to carry out detailed calculations on complex crystal structures in multicomponent systems using ab initio DFT.…”

Formation of Al–Fe–Si glass that grows from the melt through a first-order transition

“…Microdiffraction patterns taken from isolated grains in area C show that the grains belong to the b.c.c. ␣-phase (Im3, a = 1.256 nm [7]), which is metastable in Al-Fe-Si [8][9][10], and stable with a slightly different structural modification (Pm3, a = 1.264 nm) in Al-Mn-Si [11]. This phase can be seen as a 1/1 cubic approximant of an icosahedral quasicrystal with nearicosahedral Mackey clusters assembled in bcc lattice nodes [11].…”