발간논문

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Vol.38, No.12, 1581 ~ 1586, 2000
Title
Study on Mechanical and Creep Characteristics of Nb Containing Zr Alloys
윤영균Young Gyoon Yoon,위명용Myeong Yong Wey,박용권Yong Gwon Park,남철Cheol Nam,정용환Yong Hwan Jeong
Abstract
The mechanical properties of M5 type (Zr-1Nb) and ZIRLO type (Zr-1Nb-1Sn-0.3Fe) alloys were evaluated for the final annealing process at the annealing temperature regime of 450∼800℃. The microstructures were observed by OM and TEM. The mechanical properties were investigated by the tensile and creep test. The β-Zr was observed at annealing temperature above 700℃. It was observed from the tensile test that the mechanical strength decreased rapidly with increasing the annealing temperature, but maintained the constant value above the fully recrystallization temperature. The tensile and creep strength of ZIRLO type alloy was higher than those of M5 type alloy. The strengthening effect of solid solution was dominant of ZIRLO type alloy. Also, it was believed that both alloys were strengthened with the appearance of β-Zr. The trend of creep strength with annealing temperature was similar to that of tensile strength. The both alloys showed good creep resistance due to the β-Zr at the annealing temperatures of 700℃ and 800℃.
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