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Fracture Behaviour of TiAl Intermetalics

SYSNO ASEP	0332791
Document Type	C - Proceedings Paper (int. conf.)
R&D Document Type	Conference Paper
Title	Fracture Behaviour of TiAl Intermetalics
Title	Lomové chování TiAl intermetalik
Author(s)	Dlouhý, Ivo (UFM-A)_{RID, ORCID} Chlup, Zdeněk (UFM-A)_{RID, ORCID} Hadraba, Hynek (UFM-A)_{RID, ORCID} Kozák, Vladislav (UFM-A)_{RID, ORCID}
Number of authors	4
Source Title	Damage and Fracture Mechanics, Failure Analysis of Engineering Materials and Structures. - New York : Springer, 2009 / Bourkharouba T. ; Elboujdaini M. ; Pluvinage G. - ISBN 978-90-481-2668-2
Pages	s. 265-274
Number of pages	10 s.
Action	African InterQuadrennial ICF Conference on Damage and Fracture Mechanics /1./ (AIQ-ICF 2008)
Event date	01.06.2008-05.06.2008
VEvent location	Algiers
Country	DZ - Algeria
Event type	WRD
Language	eng - English
Country	US - United States
Keywords	TiAl Intermetalics ; Crack Nucleation ; Behaviour
Subject RIV	JL - Materials Fatigue, Friction Mechanics
R&D Projects	GA106/07/0762 GA ČR - Czech Science Foundation (CSF)
CEZ	AV0Z20410507 - UFM-A (2005-2011)
UT WOS	000269689100028
Annotation	Tensile properties and fracture toughness have been evaluated for Ti-40Al-2Cr-2Nb-1B and Ti-46Al-0.7Cr-0.1Si-7Nb-0.2Ni alloys. Positive Nb effect on fracture resistance was found; fracture toughness of the high Nb alloy was increased at contemporary increase of tensile and flexural strength. Fracture surfaces were evaluated using scanning electron microscopy showing the key role of mechanical twinning in deformation of both alloys. As a governing mechanism of the crack initiation a microcrack nucleation at boundaries between deformation twins and -TiAl grains was confirmed. Extensive development of shear ligament toughening was observed supplying quite good fracture toughness values in high Nb alloy.
Workplace	Institute of Physics of Materials
Contact	Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485
Year of Publishing	2010

Number of the records: 1