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3. Challenges for testing hydrogen-assisted cold cracking in weld seams of high-strength steel grades.

Author

Rhode, M., Mente, T., Kannengießer, T., Schaupp, T., and Zavdoveev, A.

Subjects
HIGH strength steel, MECHANICAL loads, DIFFUSION bonding (Metals), HOT carriers, WELDING
Abstract

Hydrogen can cause weld cold cracking even days after fabrication. In this respect, higher strength steels present a challenge to established cold crack testing. In general, the tolerable hydrogen concentration for crack prevention decreases with increasing material strength. In addition, advanced welding processes require changes in weld geometry and heat input. This directly influences the formation of crack-critical microstructures, e.g. in hardened areas of the heat-affected zone. The limits of use and application of modern cold cracking tests are evaluated by (1) the externally loaded Implant-test and (2) the self-restraint Tekken-test. In particular, external mechanical stresses, which cause additional mechanical loads on the components during welding, must be considered due to the component-specific stiffness of high-strength steels. Accompanying test methods for determining hydrogen concentration and diffusion in welds are presented, such as carrier gas hot extraction for determining hydrogen concentration (ISO 3690) or temperature-dependent diffusion coefficients. These values are of great importance for a holistic approach to the evaluation of the cold cracking sensitivity of high strength steels. [ABSTRACT FROM AUTHOR]

Published
2024
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7. PARAMETERS AND CHALLENGES FOR RELIABLE HYDROGEN DETERMINATION IN WELDED JOINTS BY CARRIER GAS HOT EXTRACTION.

Author

Rhode, M., Mente, T., and Kannengiesser, T.

Subjects
HOT carriers, GAS well drilling, CARRIER gas, GAS extraction, MATERIALS testing
Abstract

For the hydrogen-based energy economy of tomorrow, the construction of the necessary infrastructure will play a central role. Most materials used to date, such as welded steels, can be prone to hydrogen embrittlement under certain conditions. This includes the classic delayed cold cracking during welding as well as degradation phenomena during service of components in hydrogen-containing environment. For the evaluation of any hydrogen effect, for example, on the mechanical properties of a welded metallic material, the hydrogen content must be precisely determined. In the case of weld seams, the carrier gas hot extraction (CGHE) according to ISO 3690 is meanwhile state-of-the-art. CGHE is based on accelerated hydrogen degassing due to the thermal activation of hydrogen at elevated temperatures. In addition to the quantification of hydrogen, thermal desorption analysis (TDA) with varying heating rates can be used to determine and evaluate the hydrogen trapping at microstructural defects in the material. For both techniques, experimental and metrological influences must be considered, which have a major effect on the result. For example, ISO 3690 suggests different sample geometries and minimum extraction times for CGHE. This study summarizes the results and experiences of numerous investigations at the Federal Institute for Materials Research and Testing (BAM) with different sample temperatures and geometries (ISO 3690 type B and cylindrical TDA samples) regarding the influence of the sample surface (polished/welded), measurement accuracy depending on the sample volume and the insufficient monitoring of the effect of PI control on the extraction temperature. A deviating extraction temperature from the target temperature can significantly falsify the measurement results. Based on the results, methods are shown which allow the desired extraction temperature to be reached quickly without physically interfering with the measuring equipment. This serves to significantly improve the reliability of the hydrogen measurement through increased signal stability and accelerated hydrogen desorption. In general, an independent temperature measurement with dummy samples is recommended for the heating procedure of choice to exclude possible undesired temperature influences before the measurement. The methods described can be transferred directly to industrial applications. [ABSTRACT FROM AUTHOR]

Published
2024
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15. Adjunktionen

Author

Ehrig, H., Mahr, B., Cornelius, F., Große-Rhode, M., Zeitz, P., Ehrig, H., Mahr, B., Cornelius, F., Große-Rhode, M., and Zeitz, P.

Published
1999
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16. Universelle Konstruktionen

Author

Ehrig, H., Mahr, B., Cornelius, F., Große-Rhode, M., Zeitz, P., Ehrig, H., Mahr, B., Cornelius, F., Große-Rhode, M., and Zeitz, P.

Published
1999
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18. Produkte und Coprodukte

Author

Ehrig, H., Mahr, B., Cornelius, F., Große-Rhode, M., Zeitz, P., Ehrig, H., Mahr, B., Cornelius, F., Große-Rhode, M., and Zeitz, P.

Published
1999
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27. Das Resolutionsverfahren

Author

Ehrig, H., Mahr, B., Cornelius, F., Große-Rhode, M., Zeitz, P., Ehrig, H., Mahr, B., Cornelius, F., Große-Rhode, M., and Zeitz, P.

Published
1999
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28. Folgerung

Author

Ehrig, H., Mahr, B., Cornelius, F., Große-Rhode, M., Zeitz, P., Ehrig, H., Mahr, B., Cornelius, F., Große-Rhode, M., and Zeitz, P.

Published
1999
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30. Logische Äquivalenz

Author

Ehrig, H., Mahr, B., Cornelius, F., Große-Rhode, M., Zeitz, P., Ehrig, H., Mahr, B., Cornelius, F., Große-Rhode, M., and Zeitz, P.

Published
1999
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31. Datenstrukturen

Author

Ehrig, H., Mahr, B., Cornelius, F., Große-Rhode, M., Zeitz, P., Ehrig, H., Mahr, B., Cornelius, F., Große-Rhode, M., and Zeitz, P.

Published
1999
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32. Termalgebren

Author

Ehrig, H., Mahr, B., Cornelius, F., Große-Rhode, M., Zeitz, P., Ehrig, H., Mahr, B., Cornelius, F., Große-Rhode, M., and Zeitz, P.

Published
1999
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33. Homomorphismen

Author

Ehrig, H., Mahr, B., Cornelius, F., Große-Rhode, M., Zeitz, P., Ehrig, H., Mahr, B., Cornelius, F., Große-Rhode, M., and Zeitz, P.

Published
1999
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34. Ordnungen

Author

Ehrig, H., Mahr, B., Cornelius, F., Große-Rhode, M., Zeitz, P., Ehrig, H., Mahr, B., Cornelius, F., Große-Rhode, M., and Zeitz, P.

Published
1999
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35. Signaturen und Algebren

Author

Ehrig, H., Mahr, B., Cornelius, F., Große-Rhode, M., Zeitz, P., Ehrig, H., Mahr, B., Cornelius, F., Große-Rhode, M., and Zeitz, P.

Published
1999
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37. Relationen

Author

Ehrig, H., Mahr, B., Cornelius, F., Große-Rhode, M., Zeitz, P., Ehrig, H., Mahr, B., Cornelius, F., Große-Rhode, M., and Zeitz, P.

Published
1999
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38. Mengen

Author

Ehrig, H., Mahr, B., Cornelius, F., Große-Rhode, M., Zeitz, P., Ehrig, H., Mahr, B., Cornelius, F., Große-Rhode, M., and Zeitz, P.

Published
1999
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40. Einleitung

Author

Ehrig, H., Mahr, B., Cornelius, F., Große-Rhode, M., Zeitz, P., Ehrig, H., Mahr, B., Cornelius, F., Große-Rhode, M., and Zeitz, P.

Published
1999
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41. Recruiting Adolescent and Young Adult Cancer Survivors for Patient-Reported Outcome Research: Experiences and Sample Characteristics of the SURVAYA Study

Author

Vlooswijk, Carla, Poll-Franse, L.V. van de, Janssen, Silvie H.M., Derksen, E.B., Reuvers, Milou J.P., Bijlsma, Rhode M., Kaal, S.E.J., Graaf, W.T.A. van der, Husson, O., Vlooswijk, Carla, Poll-Franse, L.V. van de, Janssen, Silvie H.M., Derksen, E.B., Reuvers, Milou J.P., Bijlsma, Rhode M., Kaal, S.E.J., Graaf, W.T.A. van der, and Husson, O.

Abstract

Contains fulltext : 253634.pdf (Publisher’s version ) (Open Access)

Published
2022

42. A Negative Body Image among Adolescent and Young Adult (AYA) Cancer Survivors: Results from the Population-Based SURVAYA Study

Author

Saris, Laura M.H., Vlooswijk, Carla, Kaal, S.E., Nuver, Janine, Bijlsma, Rhode M., Hulle, T. van der, Graaf, W.T.A. van der, Husson, O., Saris, Laura M.H., Vlooswijk, Carla, Kaal, S.E., Nuver, Janine, Bijlsma, Rhode M., Hulle, T. van der, Graaf, W.T.A. van der, and Husson, O.

Abstract

Contains fulltext : 285280.pdf (Publisher’s version ) (Open Access)

Published
2022

47. Towards a formally based component description language

Author

Cramer, J., Fey, W., Goedicke, M., Große-Rhode, M., Goos, G., editor, Hartmanis, J., editor, Barstow, D., editor, Brauer, W., editor, Brinch Hansen, P., editor, Gries, D., editor, Luckham, D., editor, Moler, C., editor, Pnueli, A., editor, Seegmüller, G., editor, Stoer, J., editor, Wirth, N., editor, Abramsky, S., editor, and Maibaum, T. S. E., editor

Published
1991
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48. Transformation of combined data type and process specifications using projection algebras

Author

Große-Rhode, M., Ehrig, H., Goos, G., editor, Hartmanis, J., editor, Barstow, D., editor, Brauer, W., editor, Brinch Hansen, P., editor, Gries, D., editor, Luckham, D., editor, Moler, C., editor, Pnueli, A., editor, Seegmüller, G., editor, Stoer, J., editor, Wirth, N., editor, de Bakker, J. W., editor, de Roever, W. -P., editor, and Rozenberg, G., editor

Published
1990
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49. Differences in Internet Use and eHealth Needs of Adolescent and Young Adult Versus Older Cancer Patients; Results from the PROFILES Registry

Author

Vlooswijk, Carla, Husson, Olga, Krahmer, Emiel J., Bijlsma, Rhode M., Kaal, S.E.J., Sleeman, Sophia H.E., Graaf, W.T.A. van der, Bol, Nadine, Eenbergen, M. van, Vlooswijk, Carla, Husson, Olga, Krahmer, Emiel J., Bijlsma, Rhode M., Kaal, S.E.J., Sleeman, Sophia H.E., Graaf, W.T.A. van der, Bol, Nadine, and Eenbergen, M. van

Abstract

Contains fulltext : 244219.pdf (Publisher’s version ) (Open Access)

Published
2021

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