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材料工程  2016, Vol. 44 Issue (11): 88-95    DOI: 10.11868/j.issn.1001-4381.2016.11.015
  测试与表征 本期目录 | 过刊浏览 | 高级检索 |
非线性超声检测的因素探讨及其在HR3C烟侧腐蚀的应用
秦鹏, 李萍, 侯天宇, 赵杰, 李廷举
大连理工大学 材料科学与工程学院, 辽宁 大连 116023
Factors of Nonlinear-ultrasonic Detection and Its Application to HR3C Fireside Corrosion
QIN Peng, LI Ping, HOU Tian-yu, ZHAO Jie, LI Ting-ju
School of Materials Science and Engineering, Dalian University of Technology, Dalian 116023, Liaoning, China
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摘要 基于对影响非线超声性检测因素的探讨,考察了应用非线性检测无损评价HR3C烟侧腐蚀的可行性。结果表明:脉冲激励串个数n≤2df/c,加汉宁窗有助于降低系统干扰,此外,样品表面粗糙度对非线性系数β产生显著的影响。随腐蚀时间的延长,非线性系数呈现阶段性的递增趋势。腐蚀初期(腐蚀时间在50h以内),非线性系数增幅不足20%;然而,腐蚀至150h,非线性系数显著增加;相对于未腐蚀样品,腐蚀200h时的非线性系数增幅达260%。非线性系数的单调变化与腐蚀损伤的加剧相一致,因此,应用超声非线性无损评价HR3C的烟侧腐蚀是可行的。
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秦鹏
李萍
侯天宇
赵杰
李廷举
关键词 非线性超声检测非线性系数烟侧腐蚀    
Abstract:Based on the discussion of the factors influencing the nonlinear ultrasonic testing, the feasibility of nondestructive evaluation of HR3C fireside corrosion was investigated using nonlinear ultrasonic testing. The results show that the number of pulse string is no more than 2df/c and the installation of Hanning window is helpful to reduce the disturbance of the system, in addition, the rough surface of the sample has a significant impact on the nonlinear parameter β. The nonlinear coefficient demonstrates a phased growth trend as corrosion time prolongs. At the initial stage of corrosion(within 50h),there are small increments within 20% in the nonlinear coefficient, however,the nonlinear coefficient β is increased obviously with the duration time to 150h. Compared with un-corroded sample, the amplification in the sample corroded for 200h reaches to 260%. The monotonous varieties in nonlinear coefficient are consistent with the aggravation of corrosion damage,hence,it is feasible to nondestructively evaluate HR3C fireside corrosion by means of ultrasonic nonlinear testing.
Key wordsnonlinear ultrasonic detection    nonlinear coefficient    fireside corrosion
收稿日期: 2014-12-15      出版日期: 2016-11-22
中图分类号:  O421.5  
  O422.7  
通讯作者: 李萍(1969-),女,副教授,博士,现研究方向为材料无损检测与评价,联系地址:大连理工大学材料科学与工程学院(116023),E-mail:liping69@dlut.edu.cn     E-mail: liping69@dlut.edu.cn
引用本文:   
秦鹏, 李萍, 侯天宇, 赵杰, 李廷举. 非线性超声检测的因素探讨及其在HR3C烟侧腐蚀的应用[J]. 材料工程, 2016, 44(11): 88-95.
QIN Peng, LI Ping, HOU Tian-yu, ZHAO Jie, LI Ting-ju. Factors of Nonlinear-ultrasonic Detection and Its Application to HR3C Fireside Corrosion. Journal of Materials Engineering, 2016, 44(11): 88-95.
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http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2016.11.015      或      http://jme.biam.ac.cn/CN/Y2016/V44/I11/88
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