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基于非线性涡流的结构材料塑性损伤评价 被引量:2

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摘要 基于非线性涡流(nonlinear eddy current,简称NEC)检测技术搭建了实验系统,对Q195碳素钢和304奥氏体不锈钢两种常用核电结构材料的塑性损伤程度进行无损定量评价研究。发现材料的塑性损伤程度与非线性涡流检测信号频谱图中基频幅值、三次谐波幅值存在一定线性关系。不同材料的线性关系存在差异,Q195碳素钢的检测信号随损伤程度增大而下降,304奥氏体不锈钢的检测信号随损伤程度增大而上升。通过开发实验系统、进行塑性变形导入和非线性涡流检测实验,分析检测信号与塑性变形程度的相关性,发现检测信号中基波幅值及三次谐波幅值与检测试件的塑性变形程度具有良好相关性,验证了本研究方法对两种典型核电结构材料塑性变形无损定量评价的有效性与可行性。
出处 《振动.测试与诊断》 EI CSCD 北大核心 2015年第1期112-115,191,共4页 Journal of Vibration,Measurement & Diagnosis
基金 国家自然科学基金资助项目(50977070) 中国工程物理研究院科学技术发展基金资助项目(2014B04021)
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参考文献9

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