Studies on the physical properties of oxidized films/InGaAsP interfaces

The stress and strain curves of some universally used structural materials for superconducting magnets have been measured in several different temperature ranges and deformation stages, and the measurements are correlated with the acoustic emission of the materials. It is found that the mechanical behavior (yielding, cracking) in various deformation stages and at various temperatures and loading rates can be nondestructively and sensitively observed by analyzing waveform frequency of the acoustic emission signals. Based on the bulk of the data collected, it is concluded that it is possible to detect defects in magnet structures and distinguish which materials will fail first.