Can Acoustic Emission (AE) Make Any Contribution to the Corrosion Research
Can Acoustic Emission (AE) Make Any Contribution to the Corrosion Research
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声发射（AE）对腐蚀研究有何贡献
DOI：
10.3323/jcorr1991.53.511
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
M. Takemoto
中科院分区：
文献类型：
--
作者：
M. Takemoto
本文综述了作者在延迟断裂和应力腐蚀裂纹（SCC）声发射（AE）源波分析方面的研究成果，并讨论了声发射对腐蚀研究的贡献。通过声发射信号的源反演或源波分析，定量揭示了高低压钢氢辅助断裂过程中微断裂的动态和演化过程。然而，到目前为止，还没有任何理论或假设能够解释低强度钢氢泡中所观察到的极快的断裂和扩张动力学。奥氏体不锈钢的穿晶SCC不产生AE，表明金属沿活性路径发生阳极溶解，但溶液和熔盐中的晶间SCC产生AE。为了研究环境开裂的机理，需要声发射和潜在噪声的混合分析技术。
Paper reviews author's research results on the Acoustic Emission (AE) source wave analysis of delayed fracture and stress corrosion cracking (SCC) , and discusses what contribution has the AE made to the corrosion research. Both the dynamics and progression of micro-fractures in hydrogen assisted fracture of high and low tension steels were quantitatively revealed by the source inversion or source wave analysis of AE signals. No theory or hypothesis proposed so far, however, appears to explain the extremely fast fracture and dilatation kinetics observed in hydrogen blistering of low strength steels. Transgranular SCC of austenitic stainless steel does not produce any AE, suggesting an anodic dissolution of metal along active paths, but intergranular SCC in solution and molten salts does produce AEs. In order to study the mechanism of environmental cracking, hybrid technique of AE and potential noise analyses is needed.