발간논문

Home > KJMM 논문 > 발간논문

Vol.34, No.7, 797 ~ 805, 1996
Title
Research Paper - Transformations - : Effects of Oxygen and Heat - Treatment on the Microstructure of Nuclear Fuel Cladding Material
송승현Seung Hyun Song, 홍현선Hyun Seon Hong, 이경섭Kyung Sub Lee
Abstract
The effects of oxygen content on the microstructure and the phase transformation temperature of modified Zr alloys for nuclear fuel cladding were studied. The changes in microstructure with varying cooling rates were also investigated. The cooling rates of 0.7 and 30℃/s resulted in Widmansta¨tten structure and the cooling rate of 1000℃/s resulted in martensitic structure. As oxygen content increased, Widmansta¨tten structure was changed from basketweave to parallel plate structure and the plate width was increased. The presence of large amount of oxygen causes parallel plate structure by raising phase transformation temperature and widening (α+β) two phase region. However, martensitic structure was not affected by oxygen contents and showed fine acicular α structure in all specimens. Hardness increased with increasing oxygen content due to solid solution hardening and also increased with increasing cooling rate due to α plate refinement in Widmansta¨tten structure and due to the formation of ω phase in martensitic structure.
Key Words
| PDF
대한금속∙재료학회 │ (06633) 서울시 서초구 서초대로 56길 38 대한금속∙재료학회 회관 (서초1동 1666-12번지)
Tel : 070-4266-1646 │ FAX : 02-557-1080 │ E-mail : metal@kim.or.kr
Copyright ⓒ 2013 사단법인 대한금속∙재료학회 All rights reserved.