Abstract
Tempered AISI 4340 steel was hydrogen charged and tested for impact energy. It was found that samples tempered above 468 °C (875 °F) and subjected to hydrogen charging exhibited lower impact energy values when compared to uncharged samples. No significant difference between charged and uncharged samples tempered below 468 °C (875 °F) was observed. Neither exposure nor bake time had any significant effect on impact energy within the tested ranges.
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Acknowledgments
This work was funded by the National Science Foundation Research Experience for Undergraduates, NSF Grant #EEC-0353668. The authors appreciate the helpful comments and discussion from Dr. Sergiy Kalnaus of Oak Ridge National Laboratory.
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Mori, K., Lee, E.W., Frazier, W.E. et al. Effect of Tempering and Baking on the Charpy Impact Energy of Hydrogen-Charged 4340 Steel. J. of Materi Eng and Perform 24, 329–337 (2015). https://doi.org/10.1007/s11665-014-1268-1
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DOI: https://doi.org/10.1007/s11665-014-1268-1