Development of Creep Test Method Using Ultra-Miniature Specimen

Abstract

To assess residual creep life without adversely affecting power plant components, test methods using miniature creep specimens have been developed. However, the size of conventional uniaxial miniature creep specimens is 1 to 2 mm in reduced section diameter and 30 mm in length, and test methods with smaller specimens are demanded to be developed. In this study, a uniaxial creep test method using a miniature thin-plate specimen (Ultra-MC specimen), similar in size to a SPC specimen, was developed and the results were verified by comparison with the results from a standard specimen. The time to rupture of the Ultra-MC specimen was equivalent to that of the standard specimen and showed small variation.