| Title |
The Effect of Al and V on Microstructure and Transformation of β Phase during Solution Treatments of Cast Ti-6Al-4V Alloy |
| Authors |
(Seong-tak Oh); (Kee-do Woo); (Jae-hwang Kim); (Seung-mi Kwak) |
| DOI |
https://doi.org/10.3365/KJMM.2017.55.3.150 |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
metals; annealing; microstructure; hardness test; stabilizer |
| 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) |