Effects of Oxygen on Phase Stability and Mechanical Properties of Quenched Ti-Nb Alloys

Abstract:

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The effects of oxygen content on microstructures, elastic modulus and tensile properties of quenched Ti-Nb alloys were investigated in order to design a desirable Ti based alloy through casting process. From the microstructural and phase analysis, it is evidently revealed that the volume fraction of β phase increased with increasing content of oxygen, and the occurrence of intermediate ω phase was suppressed in metastable β Ti-Nb based alloys. Martensite transformation temperature decreased with increasing content of oxygen. Therefore, it is suggested that oxygen acts to stabilize β phase rather than α stabilizer in quenched state. Yield strength increased with increasing content of oxygen without a large consumption of ductility in metastable β Ti-Nb based alloys. The variation of mechanical property was explained by the phase stability, phase formation and microstructure in correlation with oxygen and Nb content.

Info:

Periodical:

Solid State Phenomena (Volumes 124-126)

Edited by:

Byung Tae Ahn, Hyeongtag Jeon, Bo Young Hur, Kibae Kim and Jong Wan Park

Pages:

1377-1380

DOI:

10.4028/www.scientific.net/SSP.124-126.1377

Citation:

W. Y. Kim et al., "Effects of Oxygen on Phase Stability and Mechanical Properties of Quenched Ti-Nb Alloys", Solid State Phenomena, Vols. 124-126, pp. 1377-1380, 2007

Online since:

June 2007

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Price:

$35.00

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