material defect
discrepancy of a material compared to an idealized structure; defect of (or in) a material which can lead to further damage
en-GB/məˈtɪəɹɪəl dɪˈfɛkt/
en-US/məˈtɪɹiəl ˈdifɛkt/
discrepancy of a material compared to an idealized structure; defect of (or in) a material which can lead to further damage