Acoustic Emission Monitoring on Tensile Process of H62 Copper Specimens and its Data Analysis
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摘要: 铜材料由于具有较好的耐腐蚀性，近年来被广泛应用于化工等行业。应用声发射检测技术对铜制承压设备进行检测是较为有效的方法之一。制作了H62型号的铜拉伸试件，并对拉伸过程进行了声发射监测。研究结果表明，铜材料的弹性阶段较短；对于铜拉伸试件，由于其材料黏弹性较高，出现破坏时，高幅值信号较少；相同铜试件，有效声发射信号个数与加载速率有关，加载速率越快，有效声发射信号越多；铜材料声发射信号的波形峰值频率一般出现在210~340 kHz范围。相关结论可以为开展铜制承压设备的声发射监测提供参考。Abstract: Recently, Copper material has been widely used in chemical industries because of its good corrosion resistance. Application of acoustic emission technique to detect copper pressure equipment may be one of effective methods. This paper produced H62 copper tensile specimens, which stretching process was monitored by acoustic emission technique. The results showed that, the copper had a shorter elastic stage; less high-amplitude signals were brought out when tensile specimen was broken because of its high viscoelastic characteristics; the effective number of acoustic emission signals was related with the loading rate with the same copper specimen. And there were more effective acoustic emission signals with a faster loading rate; copper material waveform peak of acoustic emission signals appeared in the range of 210~340 kHz. Conclusions can be referred when acoustic emission monitoring was carried out for copper pressure equipments.
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Keywords:
- Copper /
- Tensile testing /
- Acoustic emission monitoring /
- Data analysis
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[1] 戴光，李善春，李伟.储罐的声发射在线检测技术与研究进展［J］.压力容器,2005,22(3):33-35. [2] 李伟，蒋鹏.基于独立分量分析的声发射信号分离方法［J］.压力容器,2008,25(5):12,36. [3] 周宁.有色金属压力容器轻量化研究［D］.杭州：浙江大学,2011. [4] 李伟忠，刘延雷，王兵，等.起重机声发射检测可行性分析与试验［J］.中国特种设备安全,2010,26(6):5-7. [5] 孙国豪，柏明清，王希，等.缺陷试板拉伸过程声发射信号特性的相关性分析［J］.无损检测,2010,32(8):623-626. [6] Benallal A, Berstad T, Bvik T, et al. An experimental and numerical investigation of the behavior of AA5083 Aluminium alloy in presence of the Portevin–Le Chatelier effect［J］. International Journal of Plasticity,2008(24):1916-1945.
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