Serial sectioning to reveal sub-surface damage in special steel
867 views · Published 18 December 2018 · 0:52 · Indexed 11 October 2026
Channel: bhadeshia123 · 2018 · Education
This is a "highly commended" video by Apparao Chintha of the University of Cambridge. The sample is a special steel designed to be extremely strong and tough. The damage that is revealed is due to the steel being subjected to impact and abrasion by granite, in an impact-tumbler test. The impacts are normal to the plane of observation. It is obtained using a scanning electron microscope which has a gallium ion-beam, so after each observation of the impact surface, 50 nm are machined off and a new observation surface generated. http://www.phase-trans.msm.cam.ac.uk/2017/tampere/index.html
