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扫描电子声显微镜(SEAM)是80年代发展起来的无损检测设备。利用SEAM对脆性材料上维氏硬度压痕进行检测的结果充分显示了它在材料科学和硬度计量研究中的潜在应用前景。本文将对SEAM技术的基本原理及其在硬度计量上的可能应用作一简要的介绍。 当一有确定形状的压头,在恒定的试验力P的作用下压入试件表面时,试件在与压头的接触表面上所产生的反作用力F与形变的特征尺度a之间的关系可简化为图1的曲线,在施加试验力的半周期中,
Scanning electro-acoustic microscopy (SEAM) is a nondestructive testing device developed in the 1980s. The use of SEAM to detect Vickers indentation on brittle materials shows its potential application in material science and hardness measurement. This article will introduce the basic principle of SEAM technology and its possible application in hardness measurement. When a certain shape of the pressure head, the constant test force P is pressed into the surface of the specimen, the contact surface of the specimen with the pressure generated by the reaction force F and the deformation of the characteristic scale a The relationship can be simplified to the curve of FIG. 1, during the half-cycle in which the test force is applied,