Abstract
Since conventional uniaxial creep specimens were sometimes too large to collect from local area of target components, it was difficult to evaluate the degradation using destructive techniques. Recently, Miniature Creep (MC) tests have been recognized as a semi-destructive technique because of the small volume. It employs small specimens that could reduce the conventional uniaxial creep specimen in similarity. An MC testing machine was newly designed and developed to measure creep properties and to examine a relationship between conventional uniaxial creep and MC tests. Some MC tests were carried out in air and in Argon gas at6000C using 2.25 Cr-lMo steel. It was shown that creep rupture lives in air were shorter than those in Argon gas, and that rupture life of conventional uniaxial creep was comparable to that of MC in Argon gas.
