抄録
Small Punch (SP) Creep test is a new testing methodology where a very small specimen is required to verify creep properties The size and the volume of SP creep specimens are smaller than those of conventional uniaxial creep specimens This testing method has been recognized as a practical procedure to examine residual creep lives of high temperature components Employing a part of aged boiler tubes of STBA24 used for about 140,000 hours below 500℃, the SP and the uniaxial creep tests were conducted at 650℃ in air and Argon gas to study the relationship between the SP and the uniaxial creep tests Vickers' hardness and gram number of the test material were independent on the sampling area SP creep rupture lives were nearly the same regardless of the sampling area and the testing atmosphere Ratio of the applied load in the SP creep test to the initial stress in the uniaxial one was about 2.1mm^2, and varied with the rupture life.
