Theses and Dissertations
Issuing Body
Mississippi State University
Advisor
Rhee, Hongjoo
Committee Member
Doude, Haley
Committee Member
Doherty, Kevin
Committee Member
Whittington, Wilburn
Date of Degree
12-10-2021
Document Type
Dissertation - Open Access
Major
Mechanical Engineering
Degree Name
Doctor of Philosophy (Ph.D)
College
James Worth Bagley College of Engineering
Department
Department of Mechanical Engineering
Abstract
High hardness steels (HHS) are vulnerable to hydrogen embrittlement, which can lead to rapid degradation of mechanical properties. Improved resistance to hydrogen embrittlement would be beneficial to many industries including construction, automotive, and military. A comparison study was performed to assess the hydrogen susceptibility of select commercially available and in-house designed HHS alloys. Slow strain rate tensile tests, performed with specimens charged with various levels of hydrogen, provided a macroscopic view of the onset of hydrogen embrittlement. Hydrogen permeation and thermal desorption spectroscopy tests determined the uptake and diffusivity of hydrogen through the material. The evaluation of hydrogen susceptibility for various HHS alloys provided a baseline for the design of an HHS alloy containing hydrogen embrittlement mitigation strategies. By incorporating strong hydrogen traps, titanium carbide and epsilon carbide, a HHS was produced that demonstrated a lower sensitivity to hydrogen embrittlement
Recommended Citation
Williams, William R., "Study of alloy and process modifications to design hydrogen resilient high hardness steels" (2021). Theses and Dissertations. 5362.
https://scholarsjunction.msstate.edu/td/5362