To problem of hydrogen embrittlement of steel at droplet impingement erosion
Introduction. The work is devoted to the problem of the hydrogen saturation of steel parts skin at their high-speed impacts with a water-drop flow. A hypothesis of the water molecules dissociation at high-speed drop impacts was suggested in a number of papers. This hypothesis was confirmed by some e...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | Russian |
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Don State Technical University
2017-06-01
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| Series: | Advanced Engineering Research |
| Subjects: | |
| Online Access: | https://www.vestnik-donstu.ru/jour/article/view/150 |
| _version_ | 1797881359024259072 |
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| author | Oleg V. Kudryakov Valery N. Varavka Vladimir A. Irkha Irina V. Moiseeva |
| author_facet | Oleg V. Kudryakov Valery N. Varavka Vladimir A. Irkha Irina V. Moiseeva |
| author_sort | Oleg V. Kudryakov |
| collection | DOAJ |
| description | Introduction. The work is devoted to the problem of the hydrogen saturation of steel parts skin at their high-speed impacts with a water-drop flow. A hypothesis of the water molecules dissociation at high-speed drop impacts was suggested in a number of papers. This hypothesis was confirmed by some experimental data. The effect of this dissociation is hydrogen embrittlement of the metal surface layer. The work objective is the calculation and experimental verification of the given mechanism of the erosion destruction of the steel surface. Materials and Methods. Energy equations of various ways of the water molecules dissociation are considered for the calculation-analytical estimates. The Tate and van der Waals equations are used with allowance for the change in the phase states of water at impact. Experimental data are obtained on the basis of spectral analysis using visible monochromatic (qualitative analysis) and infrared (quantitative analysis) emissions. Research Results. An improved calculation apparatus is proposed to determine the energy level of the water molecules dissociation and free hydrogen release with account for the compressibility of water at achievable impact speeds. The results of spectral studies of bubble tracks formed on the experimental steel samples under the bench erosion tests are presented. The spectral analysis shows that the tracks are composed of air bubbles. Free hydrogen is not detected in them. Discussion and Conclusions. The calculated and experimental data obtained in this paper do not give grounds for confirming the hypothesis of hydrogen dissociation under the water-drop impacts with a steel surface in the impact velocity range of 200-600 m / s. Therefore, the mechanism of hydrogen embrittlement, apparently, should be excluded from the number of additive components of the droplet impingement erosive wear. |
| first_indexed | 2024-04-10T03:17:45Z |
| format | Article |
| id | doaj.art-578ef28e211b4417a3f36cd38b826933 |
| institution | Directory Open Access Journal |
| issn | 2687-1653 |
| language | Russian |
| last_indexed | 2024-04-10T03:17:45Z |
| publishDate | 2017-06-01 |
| publisher | Don State Technical University |
| record_format | Article |
| series | Advanced Engineering Research |
| spelling | doaj.art-578ef28e211b4417a3f36cd38b8269332023-03-13T07:31:27ZrusDon State Technical UniversityAdvanced Engineering Research2687-16532017-06-01172566910.23947/1992-5980-2017-17-2-56-69150To problem of hydrogen embrittlement of steel at droplet impingement erosionOleg V. Kudryakov0Valery N. Varavka1Vladimir A. Irkha2Irina V. Moiseeva3Донской государственный технический университетДонской государственный технический университетДонской государственный технический университетЮжно-Российский государственный политехнический университетIntroduction. The work is devoted to the problem of the hydrogen saturation of steel parts skin at their high-speed impacts with a water-drop flow. A hypothesis of the water molecules dissociation at high-speed drop impacts was suggested in a number of papers. This hypothesis was confirmed by some experimental data. The effect of this dissociation is hydrogen embrittlement of the metal surface layer. The work objective is the calculation and experimental verification of the given mechanism of the erosion destruction of the steel surface. Materials and Methods. Energy equations of various ways of the water molecules dissociation are considered for the calculation-analytical estimates. The Tate and van der Waals equations are used with allowance for the change in the phase states of water at impact. Experimental data are obtained on the basis of spectral analysis using visible monochromatic (qualitative analysis) and infrared (quantitative analysis) emissions. Research Results. An improved calculation apparatus is proposed to determine the energy level of the water molecules dissociation and free hydrogen release with account for the compressibility of water at achievable impact speeds. The results of spectral studies of bubble tracks formed on the experimental steel samples under the bench erosion tests are presented. The spectral analysis shows that the tracks are composed of air bubbles. Free hydrogen is not detected in them. Discussion and Conclusions. The calculated and experimental data obtained in this paper do not give grounds for confirming the hypothesis of hydrogen dissociation under the water-drop impacts with a steel surface in the impact velocity range of 200-600 m / s. Therefore, the mechanism of hydrogen embrittlement, apparently, should be excluded from the number of additive components of the droplet impingement erosive wear.https://www.vestnik-donstu.ru/jour/article/view/150каплеударная эрозиякавитациядиссоциация молекул водыводородное охрупчивание сталиспектральный анализdroplet impingement erosioncavitationdissociation of water moleculeshydrogen embrittlement of steelspectrographic analysis |
| spellingShingle | Oleg V. Kudryakov Valery N. Varavka Vladimir A. Irkha Irina V. Moiseeva To problem of hydrogen embrittlement of steel at droplet impingement erosion Advanced Engineering Research каплеударная эрозия кавитация диссоциация молекул воды водородное охрупчивание стали спектральный анализ droplet impingement erosion cavitation dissociation of water molecules hydrogen embrittlement of steel spectrographic analysis |
| title | To problem of hydrogen embrittlement of steel at droplet impingement erosion |
| title_full | To problem of hydrogen embrittlement of steel at droplet impingement erosion |
| title_fullStr | To problem of hydrogen embrittlement of steel at droplet impingement erosion |
| title_full_unstemmed | To problem of hydrogen embrittlement of steel at droplet impingement erosion |
| title_short | To problem of hydrogen embrittlement of steel at droplet impingement erosion |
| title_sort | to problem of hydrogen embrittlement of steel at droplet impingement erosion |
| topic | каплеударная эрозия кавитация диссоциация молекул воды водородное охрупчивание стали спектральный анализ droplet impingement erosion cavitation dissociation of water molecules hydrogen embrittlement of steel spectrographic analysis |
| url | https://www.vestnik-donstu.ru/jour/article/view/150 |
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