AE法によるTi合金の微視破壊過程の解析

抄録

Acoustic Emission (AE) refers to elastic waves generated by defect formation or micro-deformation within materials. AE method involves attaching sensors, such as piezoelectric elements, to the surface of a material. These sensors convert the AE into electrical signals, which are then amplified and recorded. The AE method is highly sensitive to surface displacement or surface velocity and offers high time resolution. The advantages of AE include the ability to locate events through multi-channel measurements, non-destructive measurement, and simultaneous use with in-situ observation techniques such as digital image correlation, X-ray, and neutron diffraction. These features have made AE useful for analyzing deformation and fracture mechanisms in structural materials and for structural health monitoring. This paper first outlines key points of AE measurement in material testing. Next, it introduces a study that analyzed the cold dwell fatigue behavior of titanium alloys as an application example of the AE method.