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Vol.49, No.2, 161 ~ 167, 2011
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| Title |
| Effect of High-Energy Mechanical Milling Time on Microstructure and Mechanical Properties of the Nano-sized TiAl Intermetallic Compounds Fabricated by Pulse Current Activated Sintering |
| 강덕수 Duck Soo Kang , 김지영 Ji Young Kim , 우기도 Kee Do Woo , 김상혁 Sang Hyuk Kim , 박상훈 Snag Hoon Park , De Liang Zhang |
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| Abstract |
| The aim of this study was to determine the effect of high-energy mechanical milling (HEMM) time and sintering temperature on microstructure and mechanical properties of the TiAl composite fabricated by pulse current activated sintering. TiAl intermetallic powders were milled by HEMM for 1h, 4h, and 8h respectively. Thermal analysis was used to observe the phase transformation of the milled TiAl powders. The sintering time decreased with increase of milling time. The hardness and fracture toughness of the sintered specimens also was improved with increasing milling time. The grain size of the sintered specimens which was milled for 4h was in the range of 50~100 nm. |
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| Key Words |
| intermetallics, sintering, microstructure, scanning electron microscopy, SEM, TiAl alloy |
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