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A Temperature Sensitive Crystal Plasticity Model For The Prediction Of High Temperature Mechanical Behaviour Of Multi-Phase TiAl Alloy

Ilyas, Muhammad Umer und Kabir, Mohammad Rizviul (2016) A Temperature Sensitive Crystal Plasticity Model For The Prediction Of High Temperature Mechanical Behaviour Of Multi-Phase TiAl Alloy. ECCOMAS Congress 2016 Proceedings. ISBN 978-618-82844-0-1.

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Kurzfassung

Intermetallic TiAl alloys for aero-engine turbine blade applications show good thermomechanical properties and excellent creep resistance. These alloys consist of multiphase intermetallic constituents, mainly of γ-TiAl and α2-Ti3Al intermetallic phases, which are arranged in the form of lamellar colonies and globular grains. Characterizing these alloys for room and high temperature behaviour is an ongoing issue that needs to be solved by using a synergic approach of experimental and numerical methods. In the recent progress of numerical approaches for the analysis of TiAl alloys, physically motivated crystal plasticity finite element models (CPFEM) have been successfully used to describe room temperature mechanical behaviour and to predict microstructure-property correlations. Unfortunately, not much progress in numerical modelling that is able to characterize this alloy with respect to high temperature mechanical behaviour has been reported. To overcome this lacking, in the present work we propose a temperature sensitive CPFEM model, where the temperature-dependent slip rates of the crystallographic deformation modes are described as a function of history variable and physical material parameters. This model has been verified and validated for multi-phase TiAl lamellar microstructure using the experimental results of fully lamellar PST-TiAl single crystal as published in the literature. Further, for the computational analysis, unit cell based FE models are constructed with representative lamellar microstructure consisting of γ-TiAl and α2-Ti3Al lamellar plates. Constitutive behaviour of the phases is described by the proposed crystal plasticity model. A multiscale localglobal FE approach has been used to obtain macro-scale homogenized mechanical behaviour of the local microstructure. In this presentation, we will show that our model is able to predict high temperature deformation behaviour of TiAl alloy as observed in the PST-TiAl experiments quite satisfactory. The model successfully captures the temperature sensitive yield behaviour, anisotropic response related to morphological and crystallographic orientation, and rate sensitivity of the slip deformation. Further, we will demonstrate that the activity of crystallographic slip systems can explain the local plasticity in both room and high temperature.

elib-URL des Eintrags:https://elib.dlr.de/108642/
Dokumentart:Tagungsband
Zusätzliche Informationen:Indexed in SCOPUS
Titel:A Temperature Sensitive Crystal Plasticity Model For The Prediction Of High Temperature Mechanical Behaviour Of Multi-Phase TiAl Alloy
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Ilyas, Muhammad UmerUmer.Ilyas (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Kabir, Mohammad RizviulMohammad-Rizviul.Kabir (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:September 2016
Referierte Publikation:Ja
Open Access:Nein
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Band:1
Seitenbereich:Seiten 1909-1919
Herausgeber:
HerausgeberInstitution und/oder E-Mail-Adresse der HerausgeberHerausgeber-ORCID-iDORCID Put Code
Papadrakakis, M.National Technical University of Athens, GreeceNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Papadopoulos, V.National Technical University of Athens, GreeceNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Stefanou, G.Aristotle University of Thessaloniki, GreeceNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Plevris, V.Oslo and Akershus University College of Applied Sciences, Oslo, NorwayNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Verlag:ECCOMAS Congress 2016 Proceedings
ISBN:978-618-82844-0-1
Status:veröffentlicht
Stichwörter:TiAl Alloy, Crystal Plasticity Modelling, High Temperature Behaviour, Computational Methods.
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:Antriebssysteme
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L ER - Engine Research
DLR - Teilgebiet (Projekt, Vorhaben):L - Virtuelles Triebwerk und Validierungsmethoden (alt)
Standort: Köln-Porz
Institute & Einrichtungen:Institut für Werkstoff-Forschung > Experimentelle und numerische Methoden
Hinterlegt von: Ilyas, Muhammad Umer
Hinterlegt am:30 Nov 2016 14:21
Letzte Änderung:24 Apr 2024 20:13

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