LI Hai-yang1, WANG Zhao-ba1, PAN Qiang-hua2
（1. Science and Technology on Electronic Test & Measurement Laboratory, North University of China, Taiyuan 030051, China；2. China Special Equipment Inspection and Research Institute, Beijing 100029, China）
Abstract： This paper presents a non-destrcutive evaluation method for the evolution of corrosion fatigue of Q235A steel. Specimen surface degradation due to corrosion fatigue from the combined interaction of corrosion and cyclic loading leads to harmonic generation during Rayleigh wave propagation along the specimen surface, which allows for an early prediction of material fatigue life. The relative nonlinearity parameter β as an evaluation parameter, which is denoted as a ratio of fundamental and second-order harmonic amplitudes, is measured by using an experimental platform based on a pair of wedge transducers to launch and receive Rayleigh wave signal. Subjected to an immersion corrosion method with 10% NaCl solution and a 20 Hz cyclic loading, a corrosion-fatigue specimen was made, and its relative nonlinearity parameter was measured every 105 cycles until to 7 ×105 cycles. A measured curve of relative nonlinearity parameter versus fatigue load cycles, which is produced by surface degradation of specimen corrosion fatigue, showed an initial steady trend followed by a rapid increase. Experimental results demonstrate that corrosion fatigue results in the sudden destruction of a Q235A steel specimen and nonlinear Rayleigh surface waves measurement technique can be used to quantitatively characterize fatigue life of Q235A steel.
Key words： corrosion fatigue; nonlinear acoustic; Rayleigh wave; Q235 steel
CLD number： TH878; O346.2+1 Document code： A
Article ID： 1674-8042（2019）01-0097-06 doi： 10.3969/j.issn.1674-8042.2019.01.014
References
［1］ Ma S, Hui L, Zhou S, et al. Influence of corrosive environment on corrosion fatigue property of pre-corroded aluminum alloys. Journal of Aeronautical Materials, 2012, 43(3): 73-78.
［2］ Yan B, Wu B, He C. Simulation and experiment of fatigue damage detection in magnesium thick plate using nonlinear Rayleigh wave. Journal of Mechanical Engineering, 2011, 47(18): 7-14.
［3］ Shui G, Wang Y. A method for nonlinear ultransonic evaluation of coating damage on metallic material. Solid Rocket Technology, 2012, 35(5): 703-706.
［4］ Shui G, Wang Y, Qu J. Evaluation of the acoustic nonlinearity parameter of materials with Rayleigh waves excited directly. Acta Acustica, 2008, 33(4): 378-384.
［5］ Walker S V, Kim J Y, Qu J, et al. Fatigue damage evaluation in A36 steel using nonlinear Rayleigh surface waves. Ndt & E International, 2012, 48(2): 10-15.
［6］ An Z W, Wang X M, Li M X, et al. Theoretical development of nonlinear spring models for the second harmonics on an interface between two solids. Chinese Physics Letters, 2009, 26(11): 118-121.
［7］ Hikata A, Chick B B, Elbaum C. Dislocation contribution to the second harmonic generation of ultrasonic waves. Journal of Applied Physics, 1965, 36(1): 229-236.
［8］ Chen J, Zhang D, Mao Y, et al. Contact acoustic nonlinearity in a bonded solid-solid interface. Ultrasonics, 2006, 44(4): e1355-e1358.
［9］ Kim J Y, Jacobs L J, Qu J, et al. Experimental characterization of fatigue damage in a nickel-base super-alloy using nonlinear ultrasonic waves. Journal of the Acoustical Society of America, 2006, 120(3): 1266-1273.
［10］ Cantrell J H, Yost W T. Acoustic nonlinearity and cumulative plastic shear strain in cyclically loaded metals . Journal of Applied Physics, 2013, 113(15): 153506-153506-6.
［11］ Xiang Y, Deng M, Xuan F Z. Thermal degradation evaluation of HP40Nb alloy steel after long term service using a nonlinear ultrasonic technique. Journal of Nondestructive Evaluation, 2014, 33(2): 279-287.
［12］ Xiang Y, Deng M, Xuan F Z. Creep damage characterization using nonlinear ultrasonic guided wave method: A mesoscale model. Journal of Applied Physics, 2014, 115(4): 044914-044925.
［13］ Liu M, Tang G, Jacobs L J, et al. Measuring acoustic nonlinearity parameter using collinear wave mixing. Journal of Applied Physics, 2010, 112(2): 024908.
［14］ Straka L, Yagodzinskyy Y, Landa M, et al. Detection of structural damage of aluminum alloy 6082 using elastic wave modulation spectroscopy. Ndt & E International, 2008, 41(7): 554-563.
［15］ Herrmann J, Kim J Y, Jacobs L J, et al. Assessment of material damage in a nickel-base superalloy using nonlinear Rayleigh surface waves. Journal of Applied Physics, 2006, 99(12): 1479-1488.
［16］ Liu M H, Kim J Y, Jacobs L, et al. Experimental study of nonlinear Rayleigh wave propagation in shot-peened aluminum plates Feasibility of measuring residual stress. Ndt & E International, 2011, 44(1): 67-74.
Q235钢材腐蚀疲劳损伤的非线性Rayleigh表面波评价方法研究
李海洋1， 王召巴1， 潘强华2
（1. 中北大学 电子测试技术重点实验室， 山西 太原 030051；2. 中国特种设备检测研究院， 北京 100029）
摘 要: 本文研究了Q235A钢腐蚀疲劳的评价方法。 在腐蚀和循环载荷共同作用下， 试样表面退化， 并导致Rayleigh波沿试样表面传播过程中产生二次谐波， 这种现象可以用于腐蚀疲劳损伤的早期评价。 以楔形换能器为基础， 搭建了Rayleigh波信号的发射和接收实验平台， 测量了相对非线性参数的变化趋势。 在10%NaCl溶液和20 Hz循环载荷的共同作用下进行腐蚀腐蚀试验， 制备腐蚀疲劳试样， 每105次疲劳周期测量一次相对非线性参数， 直至疲劳周期数为7×105次。 然后绘制试样腐蚀疲劳试验中表面退化产生的相对非线性参数与疲劳载荷循环的测量曲线， 该曲线显示出初始稳定， 之后迅速增加的变化趋势。 实验结果表明， 腐蚀疲劳会导致Q235A钢试样的突然破坏， 非线性Rayleigh表面波测量技术可用于定量表征Q235A钢的疲劳寿命。
关键词: 腐蚀疲劳损伤； 非线性声学； 表面波； Q235钢材
引用格式： LI Hai-yang, WANG Zhao-ba, PAN Qiang-hua. Corrosion-fatigue evaluation in Q235A steel using nonlinear Rayleigh surface waves. Journal of Measurement Science and Instrumentation, 2019, 10(1)： 97-102. ［doi： 10.3969／j.issn.1674-8042.2019.01.014］
[full text view]
