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Vol.36, No.7, 1062 ~ 1069, 1998
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| Title |
| Effects of V and Zr Additions on the Plastic Deformation Behavior of Ll2 (Al, Cr)3Ti-based Two-Phase Intermetallic Compounds |
| 박정용 Jeong Yong Park , 오명훈 Myung Hoon Oh , 위당문 Dang Moon Wee |
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| Abstract |
| Effects of V and Zr additions on the microstructures and the mechanical properties of two-phase intermetallic compounds consisting of LI2 matrix and 20vol.% Cr2Al were investigated. Among the V-added two-phase intermetallic compounds, Al-2lTi-20Cr-3V showed the best ductility as well as relatively high yield strength. V was found to substitute for Cr and improve the ductility of Cr2Al phase, In the case of Zr-added two-phase alloys, the particle size of Cr2Al was refined, and Zr was found to be soluble only in Li matrix As Zr content increased in the Zr-added two-phase alloys, the yield strength increased, but the ductility decreased. It was found in Zr-added two-phase alloys that the loss of ductility in Li matrix due to Zr additions was more significant than the ductilizing effect due to second phase refinement. Zr-added two-phase alloys, however, shoed higher yield strength than V-added two-phase alloys over the entire temperature range tested. Based on the results obtained, plastic deformation behavior of two-phase intermetallic compounds alloyed with V and Zr were examined. Al-19Ti-21Cr-2V-2Zr showed the best mechanical properties among the alloys tested, which is suggested to be the alloy composition to optimize the effects of V and Zr additions simultaneously. |
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| Key Words |
| Intermetallic compounds, Ll2 (Al, Cr)3Ti, Plastic deformation behavior, V additions, Zr additions |
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