Evaluation of hydrogen-assisted cracking behavior of low-alloy steel in the range 95 °C to 350 °C
| Autor: | Hideya Anzai, Jiro Kuniya, Isao Masaoka |
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| Rok vydání: | 1992 |
| Předmět: |
Materials science
Hydrogen Alloy steel Metallurgy technology industry and agriculture Metals and Alloys Mineralogy chemistry.chemical_element engineering.material Strain rate Condensed Matter Physics Cracking chemistry Mechanics of Materials Corrosion fatigue engineering Elongation Composite material Tensile testing Hydrogen embrittlement |
| Zdroj: | Metallurgical Transactions A. 23:1291-1298 |
| ISSN: | 2379-0180 0360-2133 |
| DOI: | 10.1007/bf02665061 |
| Popis: | In this report, hydrogen-assisted cracking (HAC) behavior of low-alloy steel was evaluated using a constant elongation rate tensile test, and the temperature and crack tip strain rate effects were observed. It was found that temperature dependence of the threshold condition (C σm c ) of HAC above about 100 °C followed the relation C σm c = Kexp(−41,300/Rr) whereK is a constant andT is absolute temperature. The relationship between HAC growth rate and crack tip strain rate was established as almost linear, irrespective of temperature and hydrogen concentration at the crack tip. Hydrogen heat release tests were also performed. From these tests, formation and growth of microcracks which are trap sites of hydrogen were thought to be the mechanism of HAC in the steel. From this mechanism, HAC behavior of the low-alloy steel could be qualitatively explained. |
| Databáze: | OpenAIRE |
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