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Micromechanical modeling of deformation behavior of duplex type TNB alloy with a multi-scale modeling approach

Kabir, Mohammad Rizviul and Chernova, Liudmila and Bartsch, Marion (2008) Micromechanical modeling of deformation behavior of duplex type TNB alloy with a multi-scale modeling approach. TMS 2008 Annual Meeting, 2008-03-09 - 2008-03-13, New Orleans, USA.

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Abstract

Room temperature deformation behavior of niobium-containing two-phase TiAl alloy has been investigated numerically using a two-scale micromechanical FE model. A polycrystal with duplex microstructure consisting of globular and lamellar grains is modeled with 3D unit cells that take into account specific volume fractions and orientations of the grains. The constitutive behavior of the α<SUB>2</SUB> and γ-phases is described by continuum mechanics based crystal plasticity model. Quantitative representations of microstructural details are obtained from the SEM analysis of a particular TNB alloy. The material parameters of the α<SUB>2</SUB> and γ-phases are initially taken from literatures and modified to fit the tensile behavior of the TNB alloy. The model provides an insight into the local variation of stresses and strains of the duplex microstructure consisting of globular and lamellar colonies. The role of dislocations and slip systems on the evolution of local plastic deformation is discussed.

Item URL in elib:https://elib.dlr.de/56595/
Document Type:Conference or Workshop Item (Speech)
Title:Micromechanical modeling of deformation behavior of duplex type TNB alloy with a multi-scale modeling approach
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Kabir, Mohammad RizviulUNSPECIFIEDUNSPECIFIED
Chernova, LiudmilaUNSPECIFIEDUNSPECIFIED
Bartsch, MarionUNSPECIFIEDUNSPECIFIED
Date:12 March 2008
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Titanium Aluminide, Duplex microstructure, Modeling, Multi-scale
Event Title:TMS 2008 Annual Meeting
Event Location:New Orleans, USA
Event Type:international Conference
Event Dates:2008-03-09 - 2008-03-13
Organizer:The Minerals, Metals & Materials Society
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:L VU - Air Traffic and Environment (old)
DLR - Research area:Aeronautics
DLR - Program:L VU - Air Traffic and Environment
DLR - Research theme (Project):L - Low-Emission Air Traffic (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research
Deposited By: Kabir, Dr. -Ing Mohammad Rizviul
Deposited On:05 Dec 2008
Last Modified:27 Apr 2009 15:34

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