作者：张洪波, 付倞骅, 李小亭, 杨硕, 马哲

作者单位：河北大学质量技术监督学院, 河北 保定 071000

关键词：声发射监测;Q235B;不同深度缺陷;拉伸试验

摘要：

通过对带有不同深度缺陷的Q235B板材的拉伸试验，利用声发射监测材料拉伸过程，获得材料拉伸过程中声发射信号，结合载荷时间曲线对声发射能量、撞击数、幅值等参数进行分析，研究各阶段声发射信号变化，以及不同深度缺陷声发射信号变化趋势。结果表明：声发射信号能够较好地反映损伤过程，屈服阶段声发射信号主要集中在下屈服点附近，随着缺陷的深度增加，下屈服点附近撞击数峰值有所下降；超过70 dB的幅值信号随缺陷深度增加而增多，其数量占总幅值数量的比例也随之增加；持续时间超过500 s的幅值信号分为A、B两类。试验结果对起重机械声发射监测的损伤判定提供依据。

Acoustic emission characteristics of Q235B plate with different depth defects on tensile test

ZHANG Hongbo, FU Jinghua, LI Xiaoting, YANG Shuo, MA Zhe

College of Quality and Technical Supervision, Hebei University, Baoding 071000, China

Abstract: Through tensile test of Q235B plates with defects at different depths and tensile process of acoustic emission (AE) materials, the AE signals in the tensile process are obtained. Through the analysis on parameters including energy, hits and amplitude of acoustic emission with the loading time curve, the changes of AE signal in different stages and the trend of AE signal change with defects at different depths are researched. The results indicate that AE signals could better reflect the damage process. The AE signals in the yield stage are mainly concentrated near the lower yield point. With the increase of the depth of the defects, the hits peak near the lower yield point declines and both the amplitude signal over 70 dB and the proportion of its number in the total amplitude number increase. The amplitude signal lasting for over 500 μs can be divided into categories A and B. The test results could provide evidence for the damage determination of the AE monitoring of crane.

Keywords: acoustic emission monitoring;Q235B;different depth defect;tensile test

2016, 42(9): 130-133,144  收稿日期: 2015-12-20;收到修改稿日期: 2016-1-25

基金项目: 

作者简介: 张洪波(1977-),男,河北唐山市人,副教授,主要从事特种设备无损检测研究。

参考文献

[1] 吴彦,沈功田,葛森. 起重机械无损检测技术[J]. 无损检测,2006,28(7):367-372.
[2] 伍蒋军,黄振峰,毛汉领. 金属拉伸声发射信号特征分析[J]. 浙江工业大学学报,2011,39(3):301-304.
[3] 梁志刚,吴艳红,丁利伟,等. 16MnR/0Cr18Ni9Ti复合钢板损伤与断裂过程的声发射特性试验[J]. 无损检测,2010, 32(7):493-497.
[4] 张颖,赵广宇,周俊鹏,等. 20^#钢拉伸过程的声发射信号特性分析[J]. 化工机械,2013,40(5):569-574.
[5] 张忠政,巩建鸣,梁华. 锆金属拉伸的声发射特性[J]. 无损检测,2010,32(12):944-947.
[6] KHAN S A, CHIVAVIBUL P, SEDLAK P, et al. Analysis of acoustic emission singnals during tensile deformation of Fe-Si steels with various silicon contents[J]. Metallurgical & Materials Transactions Part A,2013,44(8):3623-3634.
[7] ILLKOVA K, DOBRON P, CHMELIK F, et al. Effect of aluminium and calcium on the microstructure, texture, plastic deformation and related acoustic emission of extruded magnesium-manganese alloys[J]. Journal of Alloys and Compounds,2014(617):253-264.
[8] SAHOO S, JHA B B, SAHOO T K. Acoustic emission study of deformation behaviour of sensitised 304 stainless steel[J]. Materials Science & Technology,2014,30(11):1336-1342.
[9] MERSON E, VINOGRADOV A, MERSON D L. Application of acoustic emission method for investigation of hydrogen embrittlement mechanism in the low-carbon steel[J]. Journal of Alloys and Compounds,2014(645):460-463.
[10] LI Y, XIAO G Y, CHEN L B, et al. Acoustic emission study of the plastic deformation of quenched and partitioned 35CrMnSiA steel[J]. Metallurgy and Materials,2014, 21(12):1196-1204.
[11] 吴占稳. 起重机的声发射源特性及识别方法研究[D]. 武汉:武汉理工大学,2008.
[12] 谢志龙,闫小青,扶名福,等. 不同取样方向钢板试件的声发射特征分析[J]. 南昌大学学报(工科版),2011,33(2):160-164.
[13] 刘然,周伟,李亚娟,等. 金属/玻璃钢柱壳胶接头拉伸实验声发射检测[J]. 中国测试,2015,41(9):123-128.