| Title |
Effect of Composition and Annealing Temperature on the Mechanical Properties of TiAl (Cr) Alloys |
| Authors |
김우식(Woo Sik Kim); 김상주(Sang 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. |