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Damage Evolution and Mechanical Properties 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 Mechanical Properties After Impact of the TiAl Alloy TNBV3B. Eucomas 2009, 1.-2. Juli 2009, Augsburg, Deutschland.

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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 high-speed impact damage on the mechanical behaviour of a cast and a forged version of the intermetallic TiAl alloy TNBV3B 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 location of the impact. The location of the impact on the specimen plays an important role as the damage increases with increasing distance until a critical value is reached depending on the local thickness and the energy. Fatigue experiments (R=0.1) at different temperatures were performed to determine the threshold for crack growth as a function of the damage size of the material after impact. For these tests, specimens showing cracks with up to 2 mm length on the specimen back side and specimens showing blow-outs were chosen.

Document Type:Conference or Workshop Item (Poster)
Title:Damage Evolution and Mechanical Properties 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 Deutshland
Roth-Fagaraseanu, DanRolls-Royce Deutschland
Voggenreiter, HeinzHeinz.Voggenreiter@dlr.de
Date:July 2009
Status:Published
Keywords:TiAl, Impact, Mechanical Properties
Event Title:Eucomas 2009
Event Location:Augsburg, Deutschland
Event Type:international Conference
Event Dates:1.-2. Juli 2009
Organizer:VDI
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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