Effects of titanium content on hydrogen embrittlement susceptibility of hot-stamped boron steels
By Kim, Hye-Jin; Jeon, Soon-Hyeok; Yang, Won-Seog; Yoo, Byung-Gil; Chung, Yoo-Dong; Ha, Heon-Young; Chung, Hyun-Young
Published in Journal of Alloys and Compounds
2018
Abstract
This study examines the effects of titanium content on hydrogen embrittlement in hot-stamped boron steel, by employing an electrochemical cathodic charging method, slow rate tensile tests, and thermal desorption analyses. With increasing titanium content in hot-stamped boron steel, titanium carbides are precipitated, while the resistance to hydrogen embrittlement improves with a slight reduction in the elongation when stress is applied to the hydrogen-charged specimens. The specimens with a high titanium content exhibit a relatively superior resistance to hydrogen embrittlement due to the presence of small titanium carbide precipitates that act as irreversible hydrogen trap sites with a high binding energy.
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