|About this Abstract
||MS&T22: Materials Science & Technology
||Steels for Sustainable Development
||Mechanical Property Alterations through Hydrogen Trapping by Nanocarbide Dispersions in Steels
||Bahrum Prang Rocky, Shrestha Rakish , Chris San Marchi, Ryan Wilkerson, Chris Weinberger, Steve Daniweicz, Gregory Thompson
|On-Site Speaker (Planned)
||Bahrum Prang Rocky
A subset of transition metal carbides is identified to trap hydrogen for mitigating hydrogen embrittlement (HE). Using a powder metallurgy process, these carbide nanoparticles are dispersed in 304L stainless steel powder matrices and consolidated by direct current sintering. Tensile test specimens were extracted from the consolidated billets and then subjected to hydrogen gas-phase precharging before testing. The consolidated 304L specimens (with no carbide dispersion) exhibited similar mechanical performance to a wrought 304L sheet in the pre-and post-H-precharged states. With the carbide dispersion additions, up to 1.0 wt.%, the strength increased but with a corresponding decrease in ductility. After hydrogen precharging, all samples exhibited a reduction in ductility from their non-charged state; however, the net ductility loss between the non-charged and H-precharged conditions was reduced with the carbide presence. This talk will address the potential trapping mechanism(s) and optimization strategies in carbide dispersion contents to reduce HE sensitivity in these materials.