High strength beta titanium alloys: New design approach

High strength beta titanium alloys: New design approach

A novel approach for development of high strength and ductile beta titanium alloys was proposed and successfully applied. The microstructure of the designed alloys is fully composed of a bcc beta -Ti phase exhibiting dendritic morphology. The new Ti68.8Nb13.6Cr5.1Co6Al6.5 (at%) alloy (BETAtough allo...

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Veröffentlicht in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2015-03, Vol.628, p.297-302
Hauptverfasser: Okulov, I.V., Wendrock, H., Volegov, A.S., Attar, H., Kühn, U., Skrotzki, W., Eckert, J.
Format: Artikel
Sprache:eng
Schlagworte:
Alloys
Amorphous materials
Deformation
High strength
Materials science
Microstructure
Scanning electron microscopy
Titanium base alloys
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Zusammenfassung:A novel approach for development of high strength and ductile beta titanium alloys was proposed and successfully applied. The microstructure of the designed alloys is fully composed of a bcc beta -Ti phase exhibiting dendritic morphology. The new Ti68.8Nb13.6Cr5.1Co6Al6.5 (at%) alloy (BETAtough alloy) exhibits a maximum tensile strength of 1290 plus or minus 50MPa along with 21 plus or minus 3% of fracture strain. The specific energy absorption value upon mechanical deformation of the BETAtough alloy exceeds that of Ti-based metallic glass composites and commercial high strength Ti-based alloys. The deformation behavior of the new alloys was correlated with their microstructure by means of in-situ studies of the microstructure evolution upon tensile loading in a scanning electron microscope.
ISSN:0921-5093
DOI:10.1016/j.msea.2015.01.073