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

被引：7

作者：

Abou Khatwa, MK ^{[1
]}

Malakhov, DV ^{[1
]}

机构：

[1] McMaster Univ, Dept Mat Sci & Engn, Hamilton, ON L8S 4L7, Canada

来源：

CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY | 2006年 / 30卷 / 02期

关键词：

aluminum alloys; AA6111; intermetallics; CALPHAD method; thermo-calc;

D O I：

10.1016/j.calphad.2005.09.001

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

An experimental investigation of both as-cast and heat-treated AA6111 alloys pointed to the quaternary phase Al-16(Fe, Mn)(4)Si-3 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 Al-16(Fe, Mn)(4)Si-3 participated were handled within the framework of the CALPHAD method. (C) 2005 Elsevier Ltd. All rights reserved.

引用

页码：159 / 170

页数：12

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