발간논문

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Vol.32, No.6, 697 ~ 706, 1994
Title
High - Temperature Deformation Behavior of Tial ( Cr ) Intermetallic Compound
김우식Woo Sik Kim, 이후철Hu Chul Lee, 김상주Sang Joo Kim
Abstract
The purpose of this study is to investigate the high temperature deformation behavior of Ti_(50) Al_(49)Cr₁ and Ti_(50)Al_(47)Cr₃ intermetallic compounds. The alloys were prepared by vacuum induction melting process using calcia crucible. Flow stresses at high temperature could be well explained by the hyperbolic relations and Zener-Hollomon parameter. With increasing Cr content, the activation energy of deformation also increased significantly. Deformability maps were obtained as a function of temperature, strain rate and flow stress. Higher Cr content in the alloy resulted in larger volume fraction of lamellar grains, the greater inhomogeneities in deformation, and higher flow stresses. Dynamic recrystallization is observed to start along the boundaries of lamellar structure at 1000℃
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