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一、概述本世纪五十年代,金属物理学家发现,金属在拉伸和相变过程中会发出噪声,他们对这种发射现象进行了较系统的研究。 Kaiser最早研究了金属形变时的发声,他第一个用电子检测装置记录到了锌、铜、铝和铅等金属在拉伸时发出的声波,并认为声发射是由晶粒之间的相对滑动造成的。他还观察到,第二次拉伸试样时,只有当拉力超过第一次拉伸的最大拉力值后,才会产生新的声发射。这一效应被命名为Kaiser效应。
I. Overview In the 1950s, metal physicists found that metals would make noise during the stretching and transformation process. They conducted a systematic study of this emission phenomenon. Kaiser first studied the sound of metal deformation, the first electronic detection device he was recorded by the zinc, copper, aluminum and lead and other metals in the stretching sound waves and that the acoustic emission is caused by the relative sliding between the grains Caused. He also observed that for the second tensile test, new acoustic emissions were only generated when the tensile force exceeded the maximum tensile value of the first stretch. This effect is called the Kaiser effect.