Mechanical properties and acoustic emission in A 533 B steel in temperature range 24–288°C

Abstract

The mechanical properties of A 533B C11 steel in uniaxial tension have been investigated as a function of specimen orientation throughout the temperature range 24–288°C. Simultaneously, measurements of the acoustic emission output have been made and this has been shown to be a sensitive function of the metallurgical microstructure. Attention has been focused on the relationship between yield stress and strain ‘energy’ released as acoustic emission at general yielding. The results demonstrate two distinct trends, one for longitudinal and transverse specimens, the other for short-transverse specimens. Signal amplitude analysis did not discriminate between different specimen orientations, but it proved to be useful in the detection of load instabilities the microstructural origin of which has been explored by examinations of the fracture surfaces using a scanning electron microscope.