Effect of Cleanliness on Hydrogen Tolerance in High-Strength Steel

Report No. ARL-TR-6885
Authors: Scott M. Grendahl; Franklyn Kellogg; Hoang Nguyen
Date/Pages: April 2014; 32 pages
Abstract: This work utilized a Design of Experiments (DoEs) approach to generate comparative data sets for the common test geometries across a range of load level, material strength, and hydrogen concentration. The design created an empirical predictive mathematical model for failure based on input conditions. The models have proven successful in qualitative and quantitative assessment of performance. Targeted models will be developed for prospective maintenance chemicals and coatings where implementation is currently hindered because of hydrogen concerns. These models will clearly show where the materials can be safely employed based on material strength and/or loading level in the application. Alleviation of hydrogen concerns for popular chemicals and coatings will lead to implementation at military depots and the commercial aerospace industry using new, more environmentally friendly solvents and coatings.
Distribution: Approved for public release
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Last Update / Reviewed: April 1, 2014