Recruitment

摘要

HIC - Hydrogen Induced Cracking is a damage mechanism where cracking occurs due to a build-up of pressure of hydrogen molecules trapped at sites within the metallic lattice. Atomic hydrogen is small compared to metallic atoms and can diffuse through the metal, driven either by high temperatures or by a high concentration gradient. The atomic hydrogen gathers at small voids in the metal lattice and recombines into hydrogen molecules. The build-up of hydrogen molecules increases the pressure within the void and causes cracking or blistering.