발간논문

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Vol.38, No.1, 21 ~ 26, 2000
Title
Pesearch Paper / Mechanical Behavior : Study on the High Temperature deformation Behavior of Ti-6Zr-6Nb-6Sn Alloy
오민석Min Seok Oh,김성곤Seong Kon Kim,박중근Joong Keun Park
Abstract
High temperature deformation behavior of Ti-6Zr-6Nb-6Sn alloy was studied using compression test at strain rates from 0.001s^(-1) to 10s^(-1) and at temperature from 650℃ to 900℃. High temperature deformation efficiency has been evaluated following the Prasad et al.`s model and flow instability condition has been also estimated according to the Kumar et al.`s model. The results showed that a dynamic recrystallization of α and β-grain is primarily responsible for high deformation efficiency and that an unstable flow condition is closely related with the formation of deformation shear band. The optimum working condition has been estimated to be the strain rate 10s^(-1) at the temperature 750℃, which results in a fine and equiaxed α + β duplex microstructure.
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