On the thermodynamic stability of intermetallic phases in the AA6111 aluminum alloy

Mohamed K. Abou Khatwa; Dmitri V. Malakhov

doi:10.1016/j.calphad.2005.09.001

On the thermodynamic stability of intermetallic phases in the AA6111 aluminum alloy

Mohamed K. Abou Khatwa, Dmitri V. Malakhov

Research output: Contribution to journal › Article › peer-review

Abstract

An experimental investigation of both as-cast and heat-treated AA6111 alloys pointed to the quaternary phase Al₁₆(Fe,Mn)₄Si₃ as the dominant intermetallic phase. Weight fractions of this phase were determined by extracting it from the alloys via a selective dissolution of the FCC matrix in boiling phenol. The fractions found were significantly greater than those predicted by thermodynamic modeling. In an attempt to resolve the contradiction, it was assumed that the thermodynamic stability of the quaternary phase reported in literature had been underestimated. In order to refine its thermodynamic characteristics, conditions of phase equilibria in which Al₁₆(Fe,Mn)₄Si₃ participated were handled within the framework of the CALPHAD method.

Original language	English (US)
Pages (from-to)	159-170
Number of pages	12
Journal	Calphad: Computer Coupling of Phase Diagrams and Thermochemistry
Volume	30
Issue number	2
DOIs	https://doi.org/10.1016/j.calphad.2005.09.001
State	Published - Jun 2006
Externally published	Yes

Keywords

AA6111
Aluminum alloys
CALPHAD method
Intermetallics
Thermo-Calc

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
Computer Science Applications

Online availability

10.1016/j.calphad.2005.09.001

Library availability

Discover UIUC Full Text

Cite this

@article{e9988e392a3e49ffb0731943ded5c21f,

title = "On the thermodynamic stability of intermetallic phases in the AA6111 aluminum alloy",

abstract = "An experimental investigation of both as-cast and heat-treated AA6111 alloys pointed to the quaternary phase Al16(Fe,Mn)4Si3 as the dominant intermetallic phase. Weight fractions of this phase were determined by extracting it from the alloys via a selective dissolution of the FCC matrix in boiling phenol. The fractions found were significantly greater than those predicted by thermodynamic modeling. In an attempt to resolve the contradiction, it was assumed that the thermodynamic stability of the quaternary phase reported in literature had been underestimated. In order to refine its thermodynamic characteristics, conditions of phase equilibria in which Al16(Fe,Mn)4Si3 participated were handled within the framework of the CALPHAD method.",

keywords = "AA6111, Aluminum alloys, CALPHAD method, Intermetallics, Thermo-Calc",

author = "{Abou Khatwa}, {Mohamed K.} and Malakhov, {Dmitri V.}",

note = "Financial support from the Centre for Automotive Materials and Manufacturing (CAMM) is gratefully appreciated.",

year = "2006",

month = jun,

doi = "10.1016/j.calphad.2005.09.001",

language = "English (US)",

volume = "30",

pages = "159--170",

journal = "Calphad: Computer Coupling of Phase Diagrams and Thermochemistry",

issn = "0364-5916",

publisher = "Elsevier Ltd",

number = "2",

}

TY - JOUR

T1 - On the thermodynamic stability of intermetallic phases in the AA6111 aluminum alloy

AU - Abou Khatwa, Mohamed K.

AU - Malakhov, Dmitri V.

N1 - Financial support from the Centre for Automotive Materials and Manufacturing (CAMM) is gratefully appreciated.

PY - 2006/6

Y1 - 2006/6

N2 - An experimental investigation of both as-cast and heat-treated AA6111 alloys pointed to the quaternary phase Al16(Fe,Mn)4Si3 as the dominant intermetallic phase. Weight fractions of this phase were determined by extracting it from the alloys via a selective dissolution of the FCC matrix in boiling phenol. The fractions found were significantly greater than those predicted by thermodynamic modeling. In an attempt to resolve the contradiction, it was assumed that the thermodynamic stability of the quaternary phase reported in literature had been underestimated. In order to refine its thermodynamic characteristics, conditions of phase equilibria in which Al16(Fe,Mn)4Si3 participated were handled within the framework of the CALPHAD method.

AB - An experimental investigation of both as-cast and heat-treated AA6111 alloys pointed to the quaternary phase Al16(Fe,Mn)4Si3 as the dominant intermetallic phase. Weight fractions of this phase were determined by extracting it from the alloys via a selective dissolution of the FCC matrix in boiling phenol. The fractions found were significantly greater than those predicted by thermodynamic modeling. In an attempt to resolve the contradiction, it was assumed that the thermodynamic stability of the quaternary phase reported in literature had been underestimated. In order to refine its thermodynamic characteristics, conditions of phase equilibria in which Al16(Fe,Mn)4Si3 participated were handled within the framework of the CALPHAD method.

KW - AA6111

KW - Aluminum alloys

KW - CALPHAD method

KW - Intermetallics

KW - Thermo-Calc

UR - http://www.scopus.com/inward/record.url?scp=33645851942&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33645851942&partnerID=8YFLogxK

U2 - 10.1016/j.calphad.2005.09.001

DO - 10.1016/j.calphad.2005.09.001

M3 - Article

AN - SCOPUS:33645851942

SN - 0364-5916

VL - 30

SP - 159

EP - 170

JO - Calphad: Computer Coupling of Phase Diagrams and Thermochemistry

JF - Calphad: Computer Coupling of Phase Diagrams and Thermochemistry

IS - 2

ER -

On the thermodynamic stability of intermetallic phases in the AA6111 aluminum alloy

Abstract

Keywords

ASJC Scopus subject areas

Online availability

Library availability

Related links

Fingerprint

Cite this