Anomalous isotope effects during hydrogen embrittlement of structural materials in electrolytes
β Scribed by Prof. V. A. Marichev
- Publisher
- John Wiley and Sons
- Year
- 1989
- Tongue
- German
- Weight
- 455 KB
- Volume
- 40
- Category
- Article
- ISSN
- 0947-5117
No coin nor oath required. For personal study only.
β¦ Synopsis
The critical stress intensity factors (KHE) in the case of hydrogen embrittlement of high-strength steels, titanium and aluminium alloys in electrolyte solutions in ordinary and deuterium water and in their mixtures have been determined. Two anomalous isotope effects have been discovered: I -the susceptibility of titanium and aluminium alloys to hydrogen embrittlement is higher in deuterium water than in ordinary water; I1the K H ~ values for steels in mixtures of ordinary and deuterium water are higher than in ordinary water if the potential is increased.The possible reasons for these effects are discussed.
Die kritischen
Spannungsintensitatsfaktoren der Wasserstoffversprodung (KHE) von hochfesten Stahlen. Titan-und Alumnium-Legierungen wurden in Elektrolyten mit HzO, D2O und H 2 0 + xDlO bestimmt. Dabei wurden zwei anomale Isotopeneffekte festgestellt: einmal, daB die Neigung der Titan-und Aluminium-Legierungen zur Wasserstoffversprodung in D20 grol3er ist als in H20; zum anderen. daB die KHE-Werte fur Stahle in Gemischen mit normalem Wasser und Deuteriumoxid hoher sind als in normalem Wasser bei Potentialerhohung. Die moglichen Griinde hierfiir werden erortert.
π SIMILAR VOLUMES
Rates of oxidation of XCOO-(X = H, D) by Brz in acid aqueous media were measured between 274 and 332 K. The derived Arrhenius parameters for both reactions log k ~( M -l S-') = (11.81 f 0.10) -(14.33 f 0.13)/0 log ~D ( M -' S-') = (13.77 f 0.13) -(17.62 f 0.04)/0 where 0 = 4.575T X kcal/mol, with (