Experiments and analyses on tensile behaviour of a TiAl alloy with lamellar structure

An as-cast Ti-47AI-I Cr-2.5V plate was used to perform ambient tensile test. The metallography of the specimen exhibits typical lamellar structure with two-phase titanium aluminides. Monotonic tension tests under mechanical test systems of MTS-810 and Scanning Electron Microscope (SEM), along with a...

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Bibliographic Details
Published in:Journal of materials science 2000-10, Vol.35 (19), p.4937-4943
Main Authors: Fu, Min, Hong, Youshi, Ma, Youli, Li, Shiqiong
Format: Article
Language:English
Subjects:
Applied sciences
Condensed matter: structure, mechanical and thermal properties
Crack initiation
Cracks
Crystallography
Electron microscopes
Exact sciences and technology
Fatigue, brittleness, fracture, and cracks
Lamellar structure
Materials science
Mechanical and acoustical properties of condensed matter
Mechanical properties of solids
Mechanical tests
Metallography
Metals. Metallurgy
Physics
Plates (structural members)
Tensile tests
Tension tests
Titanium aluminides
Titanium base alloys
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Description
Summary:An as-cast Ti-47AI-I Cr-2.5V plate was used to perform ambient tensile test. The metallography of the specimen exhibits typical lamellar structure with two-phase titanium aluminides. Monotonic tension tests under mechanical test systems of MTS-810 and Scanning Electron Microscope (SEM), along with a novel holder, were carried out regarding microstructure influence on crack initiation. Test results give the orientation preference of initiated cracks, i.e. 40°, 60° and 90°. Furthermore, with respect to crystallography and a model of interface mechanics, related mechanisms are discussed.
ISSN:0022-2461
1573-4803
DOI:10.1023/A:1004834509658