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声发射是60年代新兴发展的一门无损检验技术。早在50年代初,某些金属物理学者在金属材料的试验过程中,发现金属在拉伸和相变过程中发出噪声,并进行了较系统的研究。但当时并未引起人们的重视。直到60年代,由于航空、宇宙飞行和原子能工业的发展,声发射技术开始受到了广泛的注意及应用,有力地促进了声发射技术的发展。目前,国内外已投入相当的人力物力从事该项技术的试验研究,进展迅速,取得了较好的成就。声发射无损检测技术的特点是能够使被检验的对象(缺陷)能动地参加到检验的过程中去。而其他无损
Acoustic emission is a newly developed non-destructive testing technology in 60’s. As early as the early 1950s, some metal physicists found that during the testing of metallic materials, the metal made noise during the stretching and transformation, and conducted a more systematic study. But at that time did not draw the attention of people. Until the 1960s, due to the development of aviation, space flight and atomic energy industry, acoustic emission technology began to receive extensive attention and application, effectively promoted the development of acoustic emission technology. At present, quite a lot of manpower and resources have been devoted to the pilot study of this technology both at home and abroad. The progress has been made rapidly and great achievements have been made. Acoustic emission non-destructive testing technology is characterized by the ability to test objects (defects) to actively participate in the inspection process. Other non-destructive