|About this Abstract
||2023 TMS Annual Meeting & Exhibition
||Environmental Degradation of Additively Manufactured Alloys
||Combining NanoSIMS and EBSD Analysis to Define Hydrogen Trapping in Additively-manufactured Stainless Steel 316L
||Kaila Morgen Bertsch, P.K. Weber, Shohini Sen-Britain, Thomas Voisin, Chris San Marchi, Brandon Wood
|On-Site Speaker (Planned)
||Kaila Morgen Bertsch
The diffusion of hydrogen through metallic materials has been studied for decades due to its influence on hydrogen embrittlement, however, hydrogen trapping at specific microstructural features remains incompletely understood. Additive manufacturing (AM) of metals creates distinctive dislocation and segregation structures that offer a unique opportunity to deconvolute the effects of features such as dislocation structures, precipitates, and grain boundaries. In this study, hydrogen trapping was probed directly by combining SEM and EBSD of crystallographic structures and defects with high-resolution NanoSIMS to define hydrogen distributions in stainless steel 316L. Trapping was compared in deuterium gas-precharged components in the AM as-fabricated state, in the well-annealed state, after intermediate straining, and after failure to compare hydrogen redistribution with the evolution of deformation. These observations enabled a novel, direct comparison of the influence of dislocations, grain boundaries, and precipitates on critical aspects of hydrogen transport and trapping.