吉林大学学报(工学版) ›› 2003, Vol. ›› Issue (4): 21-25.

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Acoustic emission characteristics of various defects in metallic materials

HE Shu1, MA Yu-kuan2, YANG Jian-bo2   

  1. 1. College of Distance Education, Jilin University, Changchun 130025, China;
    2. College of Communication Engineering, Jilin University, Changchun 130025, China
  • Received:2002-04-17

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Abstract: Based on the principle of acoustic emission(AE)detection, a mathematical model between AE parameters and cracking stress from the relation of the signal peak voltage and emission energy during the deformation of material is established.A general expression between the total counts and counting rate is developed.During the tensile test,with the AE detecting system developed,it is found that the defects in ZG25 steel,such as gas pore,slag inclusion and microcrack, show different AE characteristics.Thus,AE as a non destructive method is practically useful for metallic materials.

Key words: acoustic emission, metal material, defect characterization

CLC Number: 

  • TG115
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