발간논문

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Vol.37, No.8, 910 ~ 917, 1999
Title
A Study on the Recrystallization Behavior of Zr-Nb Binary Alloys
임윤수Yoon Soo Lim,최양진Yang Jin Choi,김현길Hyun Gil Kim,정용환Yong Hwan Jeong,위명용Myeong Yong Wey
Abstract
Effect of niobium content on the recrystallization behavior of binary Zr-Nb alloys were studied. The specimens with 0.2, 0.4, 0.8 and 1.0 wt.% of niobium were prepared under various annealing temperatures from 300℃ to 800℃ and times from 300 to 5000 minutes after vacuum arc remelting. The recrystallization behavior was observed by a polarized optical microscope, TEM and micro-vickers hardness tester. The recrystallization temperature of the alloys slightly increased with niobimn content due to increase of activation energy. The grain growth of the alloys with 0.2 and 0.4 wt.% of niobium occured rapidly, however, that of the alloys with 0.8 and 1.0 wt.% niobium were gradually retarded due to precipitation. The hardness of the alloy with a high niobium slightly increased by the precipitation of beta phase after annealing at 800℃.
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