Advanced search
1 file | 129.73 KB
Author
Organization
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.
Keywords
Mixed-mode model, Mobility, EVOLUTION, TRANSFORMATIONS, KWN model, Al-Mg-Si alloys, Diffusion

Downloads

  • (...).pdf
    • full text
    • |
    • UGent only
    • |
    • PDF
    • |
    • 129.73 KB

Citation

Please use this url to cite or link to this publication:

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.
@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},
}

Web of Science
Times cited: