발간논문

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Vol.31, No.9, 1114 ~ 1122, 1993
Title
Effect of Composition and Annealing Temperature on the Mechanical Properties of TiAl (Cr) Alloys
김우식Woo Sik Kim, 김상주Sang Joo Kim
Abstract
Microstructural change and its effect on mechanical properties were studied for Ti-(49-45) Al-(1-5) Cr (in at.%) intermetallic compounds under various heat treatment conditions. Various microstructures such as nearly lamellar, duplex and nearly γ were obtained depending on Cr-content and heat treatment temperature. The best compressive ductility value was shown when microstructure was consisted of the lamellae of small volume fraction (about 20%) and γ matrix. The best bending ductility value was shown when the duplex structure consisted of γ and lamellae was presented. Some alloys could be deformed to true strain of 0.7 in compression at 700℃ without crack initiation.
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