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Microstructural influences on the local and global deformation of TiAl polycrystal investigated by experiments and numerical multi-scale approach incorporating crystal plasticity FE model

Kabir, M. Rizviul and Chernova, Liudmila and Zotov, Nikolay and Bartsch, Marion (2011) Microstructural influences on the local and global deformation of TiAl polycrystal investigated by experiments and numerical multi-scale approach incorporating crystal plasticity FE model. TMS 2011, San Diego, USA.

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Abstract

The influences of the microstructrual heterogeneity on the local and global mechanical behavior of a TiAl polycrystal has been investigated with experiments and numerical modeling. Two types of microstructure, duplex and near-lamellar, which are classified according to the presence of globular grains (consists of g-phases) and lamellar colonies (consists of a2+g-phases), have been studied. The representative microstructures were calculated from SEM and TEM analysis and were incorporated in a two-scale FE model. The micromechanics of deformation of the phases are described in a crystal plasticity FE model. With this polycrystal modeling approach microstructure dependent alloy properties were reliably predicted, with focus on the influence of the microstructural heterogeneity on the elastic properties at grain scale, anisotropic dependency of the material yield and contribution of dislocation-slip of the phases to the plastic deformation at local and global scale.

Item URL in elib:https://elib.dlr.de/71563/
Document Type:Conference or Workshop Item (Speech)
Title:Microstructural influences on the local and global deformation of TiAl polycrystal investigated by experiments and numerical multi-scale approach incorporating crystal plasticity FE model
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Kabir, M. RizviulInstitut für Werkstoff-ForschungUNSPECIFIED
Chernova, LiudmilaInstitut für Werkstoff-ForschungUNSPECIFIED
Zotov, NikolayIEK-1, Forschungszentrum Jülich GmbHUNSPECIFIED
Bartsch, MarionInstitut für Werkstoff-ForschungUNSPECIFIED
Date:28 January 2011
Open Access:Yes
In DOAJ:Yes
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:CPFEM, TiAl Modeling, polycrystal deformation
Event Title:TMS 2011
Event Location:San Diego, USA
Event Type:international Conference
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Propulsion Systems (old)
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Virtual Engine and Validation Methods (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Experimental and Numerical Methods
Deposited By: Kabir, Dr. -Ing Mohammad Rizviul
Deposited On:14 Nov 2011 10:10
Last Modified:14 Nov 2011 10:10

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