Year
2004
Abstract
Development of hydrogen using nuclear power source is currently receiving a great deal of attention in the United States. As a part of the Nuclear Hydrogen Initiative (NHI), a major project has recently been initiated at UNLV to identify and characterize suitable materials for such applications. Tensile properties of three candidate alloys such as Waspaloy, Alloy C-22 and Alloy C-276 have been evaluated at different temperatures relevant to the heat-exchanger applications. While tests are still ongoing, the preliminary results indicate that all three alloys are capable of maintaining appreciable high tensile strength even up to a temperature of 600oC. Fractographic evaluation by scanning electron microscopy (SEM) indicates significant ductility at elevated temperatures, as expected. The comprehensive test results obtained so far are presented in this paper.