|
Vol.36, No.4, 588 ~ 597, 1998
|
| Title |
| A Study of Microstructure and Room-Temperature Yield Strength of Cu-TiB2 Alloy Fabricated by Spray Forming Process |
| 이종상 , 이언식 , 정재영 , 안상호 , 김낙준 Jong Sang Lee , Eon Sik Lee , Jae Young Jung , Sang Ho Ahn , Nack J . Kim |
|
|
|
| Abstract |
| Cu-TiB₂ composite alloy has been fabricated by spray forming process. The spray-deposited and the extruded billet have been characterized by optical microscopy, scanning electron microscopy, X-ray diffractometry and tensile testing. Coarse TiB₂ dispersoids were observed from the Cu matrix. TiB₂ particles were formed by chemical reaction between Ti and B in the Cu melt at 1500℃. The volume fraction of TiB₂ particle varies continuously with the position of spray deposited billet due to the density difference between the TiB₂ particle and the Cu melt. The volume fraction of TiB₂ particles, in the extruded Cu-TiB₂ alloy, was also varied with increasing length of extruded material. The strengthening mechanism of the Cu-TiB₂ composite was studied based on continum mechanics, Orowan mechanism, and dislocation pileup model. |
|
|
| Key Words |
|
|
 |
|
