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Vol.55, No.3, 150 ~ 156, 2017
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| Title |
| The Effect of Al and V on Microstructure and Transformation of β Phase during Solution Treatments of Cast Ti-6Al-4V Alloy |
| Seong-tak Oh , Kee-do Woo , Jae-hwang Kim , Seung-mi Kwak |
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| Abstract |
| In this study, the effect of α and β those stabilizers on the microstructure and phase transformation of cast Ti-6wt%Al-4wt%V alloy at various solution treatment temperatures was investigated. The dependence of the transformation behavior of the β phase during the solution treatment and its dependence was determined by the partitioning of α and β stabilizing elements. Solution treatments were conducted at 850 ~ 1050 ℃ for 0.5 h and, followed by water quenching. Aging treatments at 550 ℃ for 24 h were then performed. The α` martensite was transformed from the β phase when the concentration of vanadium in the β phase was less than 4.27 at%, while the metastable β phase did not transform to α` martensite when the concentration of vanadium in the β phase was over 5.14 at%. (Received May 24, 2016; Accepted September 8, 2016) |
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| Key Words |
| metals, annealing, microstructure, hardness test, stabilizer |
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