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材料工程  2014, Vol. 0 Issue (7): 50-54    DOI: 10.11868/j.issn.1001-4381.2014.07.010
  测试与表征 本期目录 | 过刊浏览 | 高级检索 |
P91钢焊缝蠕变非线性超声检测中的衰减修正方法研究
原可义, 韩赞东, 陈以方, 钟约先
清华大学 机械工程系 先进成形制造教育部重点实验室, 北京 100084
Research on Attenuation Correction in Nonlinear Ultrasonic Testing for Creep Status Evaluation of P91 Weldment
YUAN Ke-yi, HAN Zan-dong, CHEN Yi-fang, ZHONG Yue-xian
Key Laboratory for Advanced Materials Processing Technology (Ministry of Education), Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China
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摘要 从理论上分析了衰减对非线性超声测量值的影响,并根据实际检测条件提出了一种利用时域能量对衰减进行修正的方法。以不同蠕变状态的P91钢及其焊缝为检测对象,对比了衰减修正前后的非线性超声测量值,实验结果证明,在蠕变程度较高或衰减较大的条件下,该方法能够有效的修正衰减对非线性系数测量值的影响,应用该方法可以对P91及其焊缝的蠕变状态做出更为准确的评价。
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原可义
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钟约先
关键词 P91钢超声非线性焊缝蠕变    
Abstract:The distortion of nonlinear ultrasonic measurement caused by attenuation was analyzed theoretically. According to practical testing condition, an attenuation correcting method was suggested, which used time domain energy as a correcting parameter. To verify this attenuation correcting method, P91 steels and welds with different creep status were selected as inspection objectives in a testing experiment. Attenuation corrected and non-corrected nonlinear ultrasonic measurement results of different creep status were compared respectively. And the results show that while creep is well developed or attenuation is large, the suggested method can effectively correct the distortion of nonlinear ultrasonic measuring results caused by attenuation. In other words, this method can evaluate creep status of P91 steels and welds more accurately.
Key wordsP91 steel    ultrasonic    nonlinear    weld    creep
    
1:  TG115.28  
通讯作者: 韩赞东(1969-)博士,副教授,博士生导师,研究方向:无损检测技术与系统,材料加工过程自动控制,联系地址:清华大学机械工程系焊接馆122室(100084),E-mail:hanzd@tsinghua.edu.cn     E-mail: hanzd@tsinghua.edu.cn
引用本文:   
原可义, 韩赞东, 陈以方, 钟约先. P91钢焊缝蠕变非线性超声检测中的衰减修正方法研究[J]. 材料工程, 2014, 0(7): 50-54.
YUAN Ke-yi, HAN Zan-dong, CHEN Yi-fang, ZHONG Yue-xian. Research on Attenuation Correction in Nonlinear Ultrasonic Testing for Creep Status Evaluation of P91 Weldment. Journal of Materials Engineering, 2014, 0(7): 50-54.
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http://jme.biam.ac.cn/jme/CN/10.11868/j.issn.1001-4381.2014.07.010      或      http://jme.biam.ac.cn/jme/CN/Y2014/V0/I7/50
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