Effect of carbon on the microstructures and mechanical properties of as cast Nb-base alloy

Microstructure and mechanical properties of Nb35Ti6Al5Cr8V (at.%) containing different C contents (0, 1, 11.6 at.%) were investigated. The microstructures were characterized using optical microscopy and scanning and transmission electron microscopy (SEM and TEM, respectively). The alloy without C ap...

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2008-06, Vol.485 (1), p.92-98
Main Authors: Ding, Rengen, Jones, Ian P., Jiao, Huisheng
Format: Article
Language:English
Subjects:
Applied sciences
Carbon
Elasticity. Plasticity
Exact sciences and technology
Mechanical properties
Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology
Metals. Metallurgy
Microstructure
Nb–Ti–Al alloy
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Summary:Microstructure and mechanical properties of Nb35Ti6Al5Cr8V (at.%) containing different C contents (0, 1, 11.6 at.%) were investigated. The microstructures were characterized using optical microscopy and scanning and transmission electron microscopy (SEM and TEM, respectively). The alloy without C appeared single phase: Nb solid solution (Nbss). The carbide in 1% C alloy is fcc MC. The addition of 11.6% C resulted in the formation of two types of particles: primary carbide ((Ti,Nb) 2C) and secondary carbide ((Ti,Nb)C). Compression testing was carried out at room temperature, 1073, 1273 and 1473 K. The alloys showed good compression ductility at room temperature. The strengths at room and high temperature increase with increasing C content, but the room temperature ductility decreases.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2007.07.087