Microstructure Evolution of Ti-9.2Mo-2Fe Alloy

Cheng Lin Li; Dong Geun Lee; Wen Jun Ye; Xu Jun Mi; Yong Tae Lee

doi:10.4028/www.scientific.net/AMR.567.30

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 567Microstructure Evolution of Ti-9.2Mo-2Fe Alloy

Microstructure Evolution of Ti-9.2Mo-2Fe Alloy

Abstract:

The microstructure evolution of a new designed metastable beta Ti-9.2Mo-2Fe alloy during aging treatment was investigated by TEM. The results revealed that athermal ω phases were observed in SAD pattern during water quenching from above the β transus temperature for the alloy. As well, isothermal ω phases were found during aging at 500 °C even though they have a limited time of stability. The coexistence of ω and α phase was found in the early aging time and the pre-formed ω phase during aging undergoes coarsening and act as uniformly distributed nucleation sites for α precipitation during subsequent isothermal aging treatment. A consequence of such ω- assisted nucleation is that relatively large amount of α precipitations are formed and fine distributed in β matrix. In addition, the α precipitations are of a relatively finer size scale (nanometers to sub micrometers).

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Periodical:

Advanced Materials Research (Volume 567)

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30-32

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https://doi.org/10.4028/www.scientific.net/AMR.567.30

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Online since:

September 2012

Authors:

Cheng Lin Li, Dong Geun Lee, Wen Jun Ye, Xu Jun Mi, Yong Tae Lee

Keywords:

Microstructure Evolution, Ti-Mo-Fe Alloy, Ω Phase

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