- SMALL PUNCH-CREEP TESTER AND EVALUATING METHOD OF CREEP CHARACTERISTICS FOR HIGH TEMPERATURE STRUCTURAL COMPONENTS

摘要

To the invention using the micro test piece having a size of ^{10 × 10 × 0.5 t mm,} φ6 × 0.5 t mm is typical material deterioration of the high temperature structure (thermal power plants, petrochemical plants, nuclear power plants, etc.) (Material Degradation) mechanism It relates to a test device and the evaluation method for the evaluation of high-temperature creep (creep) behavior. That is, the hot small punch (Small Punch; SP) fixture apparatus with heating (Furnace Device), static load load device (Constant Loading Device), small displacement measuring apparatus (Linear Variable Differential Transducer; LVDT), a cooling device (Cooling Device), the control apparatus and the thin plate specimen characterized in that composed of a (control device) to the upper test piece was held between the upper die and the lower die of a small punch jig characterized in that a direct load through which place the ceramic sphere of 2.4mm φ small punches - using the creep testing machine and the smile test piece high-temperature creep curves, the initial deformation amount, the creep rate in the normal state, the load index, creep rupture life, creep life consumption rate, creep activation energy, monkeu only-Grant (Monkman-Grant) It consists of a method for evaluating creep characteristics of heat-resistant materials for high temperature equipment, such as index.; The present invention is applicable to typical degradation mechanism of high-temperature and gave be nondestructively evaluated by a creep properties in a very small smile specimen, the creep characteristic of the current state evaluation of the energy conversion equipment for the severe high-temperature group members in the country.