Simulation and control of dispersoids and dispersoid-free zones during homogenizing an AlMgSi alloy

M. Cai; J. D. Robson; G. W. Lorimer

doi:10.1016/j.scriptamat.2007.06.008

Simulation and control of dispersoids and dispersoid-free zones during homogenizing an AlMgSi alloy

M. Cai, J. D. Robson, G. W. Lorimer

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

Abstract

Dispersoids and dispersoid-free zones (DFZs) near grain boundaries are produced when homogenizing as-cast alloys. The distribution and size of dispersoid precipitates and the width of DFZs affect subsequent alloy extrudability performance. A multicomponent Scheil model, coupled to a thermodynamic databank package (MTDATA) was used to calculate the concentration profiles of solutes and predict the width of the DFZs. In an attempt to eliminate the DFZs and refine the microstructure, equal channel angular extrusion was performed prior to homogenization. This had the effect of both reducing the size and improving the distribution of dispersoids, minimizing the extent of the DFZs and refining the grain size owing to recrystallization of the deformed structure during homogenization. © 2007 Acta Materialia Inc.

Original language	English
Pages (from-to)	603-606
Number of pages	3
Journal	Scripta Materialia
Volume	57
Issue number	7
DOIs	https://doi.org/10.1016/j.scriptamat.2007.06.008
Publication status	Published - Oct 2007

Keywords

Aluminium
Equal channel angular extrusion (ECAE)
Homogenization
MTDATA
Transmission electron microscopy (TEM)

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10.1016/j.scriptamat.2007.06.008

http://www.sciencedirect.com/science/article/B6TY2-4P5YK9H-2/2/37d1a41503b27488f842532e703d979a

Cite this

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title = "Simulation and control of dispersoids and dispersoid-free zones during homogenizing an AlMgSi alloy",

abstract = "Dispersoids and dispersoid-free zones (DFZs) near grain boundaries are produced when homogenizing as-cast alloys. The distribution and size of dispersoid precipitates and the width of DFZs affect subsequent alloy extrudability performance. A multicomponent Scheil model, coupled to a thermodynamic databank package (MTDATA) was used to calculate the concentration profiles of solutes and predict the width of the DFZs. In an attempt to eliminate the DFZs and refine the microstructure, equal channel angular extrusion was performed prior to homogenization. This had the effect of both reducing the size and improving the distribution of dispersoids, minimizing the extent of the DFZs and refining the grain size owing to recrystallization of the deformed structure during homogenization. {\textcopyright} 2007 Acta Materialia Inc.",

keywords = "Aluminium, Equal channel angular extrusion (ECAE), Homogenization, MTDATA, Transmission electron microscopy (TEM)",

author = "M. Cai and Robson, {J. D.} and Lorimer, {G. W.}",

note = "1359-6462 doi: DOI: 10.1016/j.scriptamat.2007.06.008",

year = "2007",

month = oct,

doi = "10.1016/j.scriptamat.2007.06.008",

language = "English",

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pages = "603--606",

journal = "Scripta Materialia",

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TY - JOUR

T1 - Simulation and control of dispersoids and dispersoid-free zones during homogenizing an AlMgSi alloy

AU - Cai, M.

AU - Robson, J. D.

AU - Lorimer, G. W.

N1 - 1359-6462 doi: DOI: 10.1016/j.scriptamat.2007.06.008

PY - 2007/10

Y1 - 2007/10

N2 - Dispersoids and dispersoid-free zones (DFZs) near grain boundaries are produced when homogenizing as-cast alloys. The distribution and size of dispersoid precipitates and the width of DFZs affect subsequent alloy extrudability performance. A multicomponent Scheil model, coupled to a thermodynamic databank package (MTDATA) was used to calculate the concentration profiles of solutes and predict the width of the DFZs. In an attempt to eliminate the DFZs and refine the microstructure, equal channel angular extrusion was performed prior to homogenization. This had the effect of both reducing the size and improving the distribution of dispersoids, minimizing the extent of the DFZs and refining the grain size owing to recrystallization of the deformed structure during homogenization. © 2007 Acta Materialia Inc.

AB - Dispersoids and dispersoid-free zones (DFZs) near grain boundaries are produced when homogenizing as-cast alloys. The distribution and size of dispersoid precipitates and the width of DFZs affect subsequent alloy extrudability performance. A multicomponent Scheil model, coupled to a thermodynamic databank package (MTDATA) was used to calculate the concentration profiles of solutes and predict the width of the DFZs. In an attempt to eliminate the DFZs and refine the microstructure, equal channel angular extrusion was performed prior to homogenization. This had the effect of both reducing the size and improving the distribution of dispersoids, minimizing the extent of the DFZs and refining the grain size owing to recrystallization of the deformed structure during homogenization. © 2007 Acta Materialia Inc.

KW - Aluminium

KW - Equal channel angular extrusion (ECAE)

KW - Homogenization

KW - MTDATA

KW - Transmission electron microscopy (TEM)

U2 - 10.1016/j.scriptamat.2007.06.008

DO - 10.1016/j.scriptamat.2007.06.008

M3 - Article

VL - 57

SP - 603

EP - 606

JO - Scripta Materialia

JF - Scripta Materialia

IS - 7

ER -

Simulation and control of dispersoids and dispersoid-free zones during homogenizing an AlMgSi alloy

Abstract

Keywords

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