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Damage Evolution and Fatigue After Impact of the TiAl Alloy TNBV3B

Gebhard, Susanne and Peters, Petrus and Turley, Felix and Roth-Fagaraseanu, Dan and Voggenreiter, Heinz (2009) Damage Evolution and Fatigue After Impact of the TiAl Alloy TNBV3B. TMS Annual Meeting 2009, 15.-19 Februar 2009, San Francisco, CA, USA.

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Abstract

TiAl-alloys show a low ductility, which limits their application especially in components prone to impact damage like turbine blades or vanes. Therefore, the influence of impact damage on the mechanical behavior of a cast and a forged TiAl-alloy has been investigated. Ballistic tests were performed with impact energies up to several Joules. In order to approach the impact situation with real blades or vanes, a blade-like geometry was chosen for the specimen edges. The caused damage has been evaluated as a function of the impact speed, the particle weight and the impact location. Fatigue experiments at different temperatures were performed to determine the threshold for crack growth as a function of the damage size after impact. For these tests, specimens showing cracks with lengths up to some millimeters on the specimen back side as well as specimens with other damages like blow-outs were chosen.

Document Type:Conference or Workshop Item (Speech)
Title:Damage Evolution and Fatigue After Impact of the TiAl Alloy TNBV3B
Authors:
AuthorsInstitution or Email of Authors
Gebhard, SusanneSusanne.Gebhard@dlr.de
Peters, PetrusPiet.Peters@dlr.de
Turley, FelixRolls-Royce Deutschland
Roth-Fagaraseanu, DanRolls-Royce Deutschland
Voggenreiter, HeinzHeinz.Voggenreiter@dlr.de
Date:February 2009
Status:Published
Keywords:TiAl, Impact, Mechanical Properties
Event Title:TMS Annual Meeting 2009
Event Location:San Francisco, CA, USA
Event Type:international Conference
Event Dates:15.-19 Februar 2009
Organizer:TMS
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L TT - Triebwerkstechnologien
DLR - Research theme (Project):L - Fan and Compressor Technologies
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Metallic Structures and Hybrid Material Systems
Deposited By: Susanne Gebhard
Deposited On:03 Nov 2009 17:19
Last Modified:03 Nov 2009 17:19

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