Microstructural evolution during aging of Ti-5Al-5Mo-5V-1Cr-1Fe alloy |
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| Authors: | Shang-zhou Zhang Zi-quan Liu Guang-dong Wang Li-qing Chen Xiang-hua Liu and Rui Yang |
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| Affiliation: | (1) School of Environment and Materials Engineering, Yantai University, Yantai, 264005, China;(2) State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang, 110004, China;(3) Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China |
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| Abstract: | The evolution of microstructure on aging of an (α+β) titanium alloy (Ti-5Al-5Mo-5V-1Cr-1Fe) in the β and (α+β) solution-treated and quenched conditions was investigated. The presence of very fine ω phase was detected by electron diffraction for samples aged below 400 °C. The fine α aggregates are uniformly formed within β grains by nucleating at the ω particles or β/ω interfaces. At higher temperature, the formation of ω phase is avoided and the α lamellae are precipitated at the preferred site of grain boundary and then within the matrix. The highest hardness values
are found when the alloys are aged at 450 °C for β condition and 350 °C for (α+β) condition.
Foundation item: Project (50634030) supported by the National Natural Science Foundation of China; Project (2007DS04014) supported by the
Program of Science and Technology of Shandong Province, China; Project supported by the Open Research Fund from the State
Key Laboratory of Rolling and Automation, Northeastern University, China |
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| Keywords: | microstructure precipitation aging |
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