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A mixed-mode model for precipitation in Al-Mg-Si alloys

A Bahrami, A Miroux, Jilt Sietsma UGent and Leo Kestens UGent (2010) TMS 2010 139th Annual meeting and exhibition supplemental proceedings, vol. 2 : materials characterization, computation and modeling and energy. p.309-316
abstract
A modified Kampmann-Wagner numerical (KWN) model has been developed considering the mixed-mode character of precipitate growth. The eta-parameter, which is proportional to the diffusivity of the diffusing alloying element and inversely proportional to the mobility of interface and to the radius of precipitates, is used to implement the character of precipitate growth into the kinetic model. The effects of interfacial energy, diffusivity, and interface mobility on the character of precipitation in Al-Mg-Si system have been systematically studied. The results show that the interfacial energy has almost no effect on the precipitation character. However, diffusivity and interface mobility have significant influences on the character of precipitation. The results also show that especially when the alloying element is interstitial, the alloy is heavily-deformed before ageing, or precipitates are very small with coherent interface, the assumption of mixed-mode growth is more accurate than the assumption of diffusion-controlled growth.
Please use this url to cite or link to this publication:
author
organization
year
type
conference (proceedingsPaper)
publication status
published
subject
keyword
Mixed-mode model, Mobility, EVOLUTION, TRANSFORMATIONS, KWN model, Al-Mg-Si alloys, Diffusion
in
TMS 2010 139th Annual meeting and exhibition supplemental proceedings, vol. 2 : materials characterization, computation and modeling and energy
pages
309 - 316
publisher
Minerals, Metals and Materials Society
place of publication
Warrendale, PA, USA
conference name
TMS 2010 139th Annual meeting on Materials Processing and Properties
conference location
Seattle, WA, USA
conference start
2010-02-14
conference end
2010-02-18
Web of Science type
Article
Web of Science id
000288718300041
ISBN
9780873397520
language
English
UGent publication?
no
classification
P1
copyright statement
I have transferred the copyright for this publication to the publisher
id
1904351
handle
http://hdl.handle.net/1854/LU-1904351
date created
2011-09-20 11:23:38
date last changed
2017-03-09 12:39:29
@inproceedings{1904351,
  abstract     = {A modified Kampmann-Wagner numerical (KWN) model has been developed considering the mixed-mode character of precipitate growth. The eta-parameter, which is proportional to the diffusivity of the diffusing alloying element and inversely proportional to the mobility of interface and to the radius of precipitates, is used to implement the character of precipitate growth into the kinetic model. The effects of interfacial energy, diffusivity, and interface mobility on the character of precipitation in Al-Mg-Si system have been systematically studied. The results show that the interfacial energy has almost no effect on the precipitation character. However, diffusivity and interface mobility have significant influences on the character of precipitation. The results also show that especially when the alloying element is interstitial, the alloy is heavily-deformed before ageing, or precipitates are very small with coherent interface, the assumption of mixed-mode growth is more accurate than the assumption of diffusion-controlled growth.},
  author       = {Bahrami, A and Miroux, A and Sietsma, Jilt and Kestens, Leo},
  booktitle    = {TMS 2010 139th Annual meeting and exhibition supplemental proceedings, vol. 2 : materials characterization, computation and modeling and energy},
  isbn         = {9780873397520},
  keyword      = {Mixed-mode model,Mobility,EVOLUTION,TRANSFORMATIONS,KWN model,Al-Mg-Si alloys,Diffusion},
  language     = {eng},
  location     = {Seattle, WA, USA},
  pages        = {309--316},
  publisher    = {Minerals, Metals and Materials Society},
  title        = {A mixed-mode model for precipitation in Al-Mg-Si alloys},
  year         = {2010},
}

Chicago
Bahrami, A, A Miroux, Jilt Sietsma, and Leo Kestens. 2010. “A Mixed-mode Model for Precipitation in Al-Mg-Si Alloys.” In TMS 2010 139th Annual Meeting and Exhibition Supplemental Proceedings, Vol. 2 : Materials Characterization, Computation and Modeling and Energy, 309–316. Warrendale, PA, USA: Minerals, Metals and Materials Society.
APA
Bahrami, A, Miroux, A., Sietsma, J., & Kestens, L. (2010). A mixed-mode model for precipitation in Al-Mg-Si alloys. TMS 2010 139th Annual meeting and exhibition supplemental proceedings, vol. 2 : materials characterization, computation and modeling and energy (pp. 309–316). Presented at the TMS 2010 139th Annual meeting on Materials Processing and Properties, Warrendale, PA, USA: Minerals, Metals and Materials Society.
Vancouver
1.
Bahrami A, Miroux A, Sietsma J, Kestens L. A mixed-mode model for precipitation in Al-Mg-Si alloys. TMS 2010 139th Annual meeting and exhibition supplemental proceedings, vol. 2 : materials characterization, computation and modeling and energy. Warrendale, PA, USA: Minerals, Metals and Materials Society; 2010. p. 309–16.
MLA
Bahrami, A, A Miroux, Jilt Sietsma, et al. “A Mixed-mode Model for Precipitation in Al-Mg-Si Alloys.” TMS 2010 139th Annual Meeting and Exhibition Supplemental Proceedings, Vol. 2 : Materials Characterization, Computation and Modeling and Energy. Warrendale, PA, USA: Minerals, Metals and Materials Society, 2010. 309–316. Print.