Effect of Y on Microstructure and Mechanical Properties of a Ti Alloy

Effect of Y on Microstructure and Mechanical Properties of a Ti Alloy

A near-α high temperature titanium alloy, Ti-6Al-2.5Sn-4Zr-0.7Mo-0.30Si, was produced with various Y contents from 0 to 0.7wt% by arc-melting technique to study the influence of Y on its microstructure and mechanical properties. It was found that small amount of Y obviously refines the grain size of...

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Veröffentlicht in:Materials science forum 2010-01, Vol.654-656, p.460-463
Hauptverfasser: Chai, Li Hua, Liu, Zhi Guang, Zhang, Chang Jiang, Chen, Yu Yong, Woo, Kee Do
Format: Artikel
Sprache:eng
Schlagworte:
Compression tests
Grain boundaries
Grain size
Hardness
Mechanical properties
Microstructure
Scanning electron microscopy
Strengthening
Titanium base alloys
Transmission electron microscopy
Yttrium
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Zusammenfassung:A near-α high temperature titanium alloy, Ti-6Al-2.5Sn-4Zr-0.7Mo-0.30Si, was produced with various Y contents from 0 to 0.7wt% by arc-melting technique to study the influence of Y on its microstructure and mechanical properties. It was found that small amount of Y obviously refines the grain size of Ti-6Al-2.5Sn-4Zr-0.7Mo-0.30Si alloy. SEM and TEM observations revealed that Y-containing phase precipitated at the β grain boundary in the form of Y2O3 particles. Hardness and compression tests performed at room temperature revealed the strengthening effect of Y.
ISSN:0255-5476
1662-9752
1662-9752
DOI:10.4028/www.scientific.net/MSF.654-656.460