가동 이력 화력 P91강의 재료거동 특성 시험 및 분석

다국어 초록 (Multilingual Abstract)

In this study, the influence of service exposure on yield strength, tensile strength, fracture toughness and creep strength behavior for Mod.9Cr-1Mo (ASME Grade 91; P91) steel has been investigated with a number relevant material tests and analyses. The material properties of the ferritic-martensitic heat resistant material of P91 steel at ultra-supercritical (USC) thermal power plants are affected by long-term operation at high temperature in creep range as operating time is accumulated. Service exposed P91 steel materials sampled from a piping system of a domestic USC plant with accumulated operation time of 73,716 hours were used for material tests. The test results of the service exposed material specimens were compared with those of the virgin P91 steel specimens in terms of a number material properties. In addition, those test data were compared with the material properties of ASME code and RCC-MRx code. Quantification of conservatisms for the material properties in the design codes have been conducted based on the comparisons of those from virgin and service exposed material specimens.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. P91강의 재료특성 실험
• 3. 결론
• 참고문헌