Journal
INTERMETALLICS
Volume 58, Issue -, Pages 36-42Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.intermet.2014.10.020
Keywords
Titanium aluminides, based on TiAl; Microstructure; Ion-beam methods; Electron microscopy, scanning; Electron microscopy, transmission
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Funding
- Engineering Physical Science Research Council (EPSRC) of United Kingdom [EP/H022309/1]
- Rolls-Royce plc [EP/H500375/1]
- Engineering and Physical Sciences Research Council [EP/H500375/1, EP/H500367/1] Funding Source: researchfish
- EPSRC [EP/H500375/1, EP/H500367/1] Funding Source: UKRI
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The deformation mechanisms associated with different fracture surface appearances of a fatigue tested lamellar TiAl-based alloy have been studied in detail by focussed ion beam and transmission electron microscopy. The results show that linear markings within translamellar plates correspond to twins and/ or slip bands. The markings in interlamellar region are associated with the crack propagation from a lamellar boundary to another. The fan-like region with linear markings belongs to a gamma grain and the markings are related to twins. Intralamellar crack propagation is associated with twin twin interaction within a gamma lamella. (C) 2014 Elsevier Ltd. All rights reserved.
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