pISSN : 1598-706X / eISSN : 2288-8381
한국주조공학회지 (11권6호 455-462)
A Study on Microstructure of Vanadium-Aluminum Alloy by Mechanical Alloying
기계적합금화법(機械的合金化法)에 의(依)한 V-Al합금(合金)의 미세조직(微細組織) 변화(變化)에 관(關)한 연구(硏究)
Woon Choi*, Ha-Young Kim**, Seoung-Eui Nam*
*Hong Ik Univ., **Taejion National Univ. of Technology
The formation of brittle intermetallic compound such as VAl_3 tends tp lower the toughness of V-Al alloys. Also, due to the high melting point of vanadium, it is difficult to make that alloy by previous ingot metallurgy method. To depress the technique has been adopted. The effect of particle size and milling time on the phase has been thoroughly studied. For mechanical alloying, SPEX mixed/mill has been used. The milling time and the composition of V and Al are varied to find the optimum condition of forming amorphous phase. The X-Ray Diffrection pattern, microstructure detection, microhandess test, experiments are carried out to analyze MA product. When the final step is reached, no lamellar-structure is detected. The steady state condition is observed after 8 hours and 10 hours milling for 15wt.%Al and 30wt.%Al alloy, respectively. The microhardness continuously increases up to 10 hours after then it remains constant.