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Investigation of microstructural influences on the micro-macro deformation of a two-phase g-TiAl alloy using a multiscale approach combined with crystal plasticity

Kabir, M. Rizviul und Chernova, Liudmila und Bartsch, Marion (2010) Investigation of microstructural influences on the micro-macro deformation of a two-phase g-TiAl alloy using a multiscale approach combined with crystal plasticity. 4th GAMM Seminar, Multiscale Material Modeling, 9-10 July 2010, Bochum, Deutschland.

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Kurzfassung

-TiAl alloys are very promising for high temperature structural applications due to their excellent thermo-mechanical properties. The main drawbacks of these alloys are low ductility and high brittleness, which lead to catastrophic failure during operation. These shortcomings can be improved by optimizing alloy design, production route and microstructure. Therefore, a clear understanding of the microstructural influences on the deformation behavior is highly required. Following this aim a duplex TiAl alloy has been investigated experimentally and numerically. This microstructure consists of lamellar colonies with ()TiAl-phases and globular grains with TiAl-phase. The microstructure has been characterized by SEM and TEM analysis and the most important structural features (e.g., vol. % of grains and colonies, their orientation, size, and presence of phases) are idealized for the micro-meso FE modeling. The micro-meso descriptions are linked with the two-scale FE2 approach. The constitutive behavior of the individual phases was described in a crystal plasticity model. Simulations have been performed to understand the deformation mechanisms of the TiAl alloy at local and global scale and the important crystallographic deformation modes that are important for the global alloy responses have been predicted. This understanding of the microstructure-property correlation delivers important information for further alloy optimization.

elib-URL des Eintrags:https://elib.dlr.de/66331/
Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Investigation of microstructural influences on the micro-macro deformation of a two-phase g-TiAl alloy using a multiscale approach combined with crystal plasticity
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Kabir, M. RizviulInstitut für Werkstoff-ForschungNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Chernova, LiudmilaInstitut für Werkstoff-ForschungNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Bartsch, MarionInstitut für Werkstoff-ForschungNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:2010
Open Access:Nein
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Status:veröffentlicht
Stichwörter:Modeling, Crystal Plasticity, Multi scale, TiAl alloy
Veranstaltungstitel:4th GAMM Seminar, Multiscale Material Modeling
Veranstaltungsort:Bochum, Deutschland
Veranstaltungsart:Workshop
Veranstaltungsdatum:9-10 July 2010
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Luftfahrt
HGF - Programmthema:Antriebe (alt)
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L ER - Antriebsforschung
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: Kabir, Dr. -Ing Mohammad Rizviul
Hinterlegt am:18 Nov 2010 17:42
Letzte Änderung:18 Nov 2010 17:42

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