CAJ | 학술논문

本文介绍了满足断裂力学验收条件要求、依据超声相控阵成像数据，对SCC(应力腐蚀裂纹)进行检测和测深定高的CI（计算机成像）技术应用的最新进展。详述用超声三向图像显示进行数据评定的过程和方法，包括B型显示（横断面视图）、C型显示（俯视图）和D型显示（纵断面视图）。数据评定解析使用由SCC试样获取的相控阵数据。此法强调以下三要素的重要性：1）波型选择对重建SCC图像的重要性；2） SCC端部回波识别对避免错判误定的重要性；3）纵断面视图对评估SCC深度轮廓。希望对国内承压设备在役无损检测和定量评价提供有用借鉴。
본문개소료만족단렬역학험수조건요구、의거초성상공진성상수거，대SCC(응력부식렬문)진행검측화측심정고적CI（계산궤성상）기술응용적최신진전。상술용초성삼향도상현시진행수거평정적과정화방법，포괄B형현시（횡단면시도）、C형현시（부시도）화D형현시（종단면시도）。수거평정해석사용유SCC시양획취적상공진수거。차법강조이하삼요소적중요성：1）파형선택대중건SCC도상적중요성；2） SCC단부회파식별대피면착판오정적중요성；3）종단면시도대평고SCC심도륜곽。희망대국내승압설비재역무손검측화정량평개제공유용차감。
In order to meet the code requirements on a fracture mechanics based acceptance criteria, the latest development of a PAUT image-based data evaluation procedure for detection and quantiifcation of SCC (Stress Corrosion Cracking) is presented. The data evaluation processes and techniques based on ultrasonic images using three types ultrasonic display is expatiated, including cross-sectional views ( B-scan ), plan views ( C-scan ) and end views ( D-scan ). The explanations of the data evaluation techniques are supported by the phased array data taken on a test sample with SCC. The developed procedure emphasizes the importance of the following three major factors, i.e.: 1) the wave mode selection for precise reconstruction of SCC images; 2) SCC tip echo identiifcation to avoid false judgment;3) the end view for estimating SCC depth contour. The intention is to provide a reference for the in-service NDE and quantity evaluation of pressure equipment in our country.