无论金属或非金属,物品遭受破坏时发出声音是做为日常经验众所周知的现象。特别是在金属范围内,自古有“锡鸣”这样一句话,由此可知,材料在达到所谓破坏这一最终阶段之前塑性变形或细微裂纹的发生、成长、直至最终达到破坏期间,发生声频(20KHz以下的频率)。如上所述,当材料变形或破坏时,由于释放能量而发生弹性波或应力波的现象称为声放射(以下记为AE),将此现象利用于材料研究或构件安全性监听的技术称为AE法。所谓AE的最初报告是1950年年初德国的Kaiser提出来的, 随后之所以能够发展是美 Whether metal or nonmetal, it is a well-known phenomenon of everyday experience that sound is emitted when items are damaged. Especially in the metal range, since ancient times, “Tin Ming ” Such a sentence, we can see that the material reaches the so-called destruction before the final stage of plastic deformation or micro-cracks, the growth until the eventual destruction of the period occurred Audio (frequency below 20KHz). As described above, the phenomenon that elastic waves or stress waves occur due to the release of energy when the material is deformed or destroyed is referred to as acoustic emission (hereinafter referred to as AE) and the technique that uses this phenomenon for material research or component safety monitoring is called AE method. The initial report of the so-called AE was made by Germany’s Kaiser in early 1950, and was subsequently developed in the United States