JOURNAL SELECT ========= JOURNAL LIST ========= 대한조선학회지 Journal of Ship and Ocean Technology Selected Papers of The Society of Naval Architects of Korea International Journal of Naval Architecture and Ocean Engineering Journal of Hydrospace Technology 대한조선학회논문집 대한조선학회 특별논문집
열처리공학회지 / v.18, no.4, 2005년, pp.235-241
Thermal creep properties of the advanced zirconium fuel claddings named by HANA alloys which were developed for high burn-up application were evaluated. The creep test of HANA cladding tubes was carried out by the internal pressurization method in temperature range from 350 to $\small{400^{\circ}C}$ and in the hoop stress range from 100 to 150 MPa. Creep tests were lasted up to 800 days, which showed the steady-state secondary creep rate. The creep resistance of HANA fuel claddings was affected by final annealing temperature and various factors, such as alloying element, applied stress and testing temperature. From the results the microstructure observation of the samples before and after creep test by using TEM, the dislocation density was increased in the sample of after creep test. The Sn as an alloying element was more effective in the creep resistance than other elements such as Nb, Fe, Cr and Cu due to solute hardening effect of Sn. In case of HANA fuel claddings, the improved creep resistance was obtained by the control of final heat treatment temperature as well as alloying element.