Number of the records: 1
Crack Resistance Characterization in TiAl Intermetallics with Enhanced Toughness
- 1.
SYSNO ASEP 0480944 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Crack Resistance Characterization in TiAl Intermetallics with Enhanced Toughness Author(s) Dlouhý, Ivo (UFM-A) RID, ORCID
Stratil, Luděk (UFM-A) ORCID
Fukutomi, H. (JP)
Hasegawa, M. (JP)Number of authors 4 Source Title Analysis of Damage Features and Failures for Structural Materials and Parts. - Zürich : Trans Tech Publications Ltd, 2017 / Strnadel B. - ISSN 1013-9826 - ISBN 978-3-0357-1127-1 Pages s. 13-18 Number of pages 6 s. Publication form Print - P Action 2016 - International Workshop on New Methods of Damage and Failure Analysis of Structural Parts /7./ Event date 01.11.2016 - 04.11.2016 VEvent location Yokohama Country JP - Japan Event type WRD Language eng - English Country CH - Switzerland Keywords Titanium aluminides ; Intermetallics ; Fracture micromechanisms ; Shear ligament toughening ; Fracture toughness ; Crack resistance Subject RIV JG - Metallurgy OECD category Materials engineering Institutional support UFM-A - RVO:68081723 EID SCOPUS 85026896008 DOI 10.4028/www.scientific.net/KEM.741.13 Annotation The paper is focused on the analysis of the role of lamellar microstructure in fracture performance of model TiAl intermetallic compound. Coarse lamellar colonies and, at the same time, fine lamellar morphology were prepared by compressive deformation at 1553 K (region of stable alpha phase in TiAl equilibrium diagram) followed by controlled cooling to 1473 K (region of alpha+gamma phase) with delay on this temperature and then cooling down. The fracture toughness was evaluated by means of chevron notch technique. In addition, because of enhanced toughness, crack resistance curves were obtained by load - unload technique of pre-racked beams, namely in two directions of crack propagation relative to lamellar structure. Extensive development of shear ligament toughening mechanism was observed in fracture surfaces leading to quite good fracture toughness thanks to the heat treatment applied. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2018
Number of the records: 1