Abstract
Hydrogen evolutions for martensitic-austenitic weld metals were measured at 45 °C. The specimen without the austenite released hydrogen in about two days, and this result agrees with the 72 h holding time required by JIS Z3118. In the case of the specimens that contain the retained austenite, hydrogen release continued for about 100 days or more. We derived the analytic solution of the McNabb & Foster diffusion equation by regarding the austenitic microstructures as trapping sites to compare the experimental and calculation results, and showed that both of them are in good agreement. We also showed that the initial ratio of free and trapped hydrogen atoms is not necessarily equal to the thermal equilibrium condition at the measurement temperature, which can be analysed using the present solution.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
Bailey N., Coe F., Gooch T., Hart P., Jenkins N. and Pargeter R.: Welding steels without hydrogen cracking, Abington Publishing and ASM International, 1973, p. 67.
Yara H., Makishi Y., Kikuta Y. and Matsuda H.: Mechanical and metallurgical properties of trial covered electrode, Quaterly Journal of the Japan Welding Society, 1987, vol. 5, no. 1, pp. 108–112.
McNabb A. and Foster P.R.: A new analysis of the diffusion of hydrogen in iron and ferritic steels, Transactions of the Metallurgical Society of AIME, 1963, vol. 227, no. 3, pp. 618–27.
Crank J.: The mathematics of diffusion, Claredon Press, Oxford, 1975.
Carslaw H.S. and Jaege J.C.: Conduction of heat in solids, 2nd ed., Oxford University Press, Oxford, 1959.
Okumura M., Kasuya T., Yurioka N. and Nagano K.; Effect of cleanliness of steel on its weldability, Quaterly Journal of the Japan Welding Society, 1988, vol. 6, no. 1, pp. 144–150.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Kasuya, T., Hashiba, Y. & Inoue, H. Hydrogen Evolution Measurements for a Martensitic-Austenitic Weld Metal. Weld World 56, 92–100 (2012). https://doi.org/10.1007/BF03321151
Published:
Issue Date:
DOI: https://doi.org/10.1007/BF03321151