Peculiarities of hydrogen effect on the creep process in the Cr-Ni-Mo steel

• Autorzy: Zagórski, A. , Student, O. , Babij, L. , Nykyforchyn, H. , Kurzydłowski, K.J.
• Języki publikacji: EN

Abstrakty

EN

Stability of the metal mechanical properties of oil hydrocracking reactor shell during long term exploitation is very important for guarantee of safe service. It is significant to investigate a metal after different duration of its service for prediction of work ability of material. The simultaneous effect of high temperature and hydrogen on an intensity of metal degradation is revealed. Besides, by comparison of creep strain Tales in air and hydrogen, is shown effect of hydrogenation on steady stale creep of metal in virgin stale and after service. In particular creep strain rate in virgin and degraded in service conditions steels is higher in hydrogen than in air. The mechanism of hydrogen effect is revealed. It is shown that tests in hydrogen make systems of sliding made active and it provides localization of creep process in the narrow strip and fracture macroorientation in direction of the tangent stresses action.

Słowa kluczowe

EN

oil hydrocracking reactor; sale service; creep rate; degradation; hydrogen effect

• Czasopismo: Advances in Materials Science
• Rocznik: 2007
• Tom: Vol. 7, nr 1(11)
• Strony: 211-218
• Opis fizyczny: Bibliogr. 11 poz., rys., tab.

Twórcy

autor

Zagórski, A.

autor

Student, O.

autor

Babij, L.

autor

Nykyforchyn, H.

autor

Kurzydłowski, K.J.

• Warsaw Technical University, Department of Materials Engineering, Warsaw, Poland

Bibliografia

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• [5] Johnson E.W., Hill M.L. The diffusivity of hydrogen in alpha iron. Trans. AIME. 218 (1960). pp. 1104-1112.
• [6] Hobson J.D. The diffusion of hydrogen in steel at temperatures of -78 °C to 200 °C. JISI 189 (1958). pp. 315-321.
• [7] Metal Handbook, ASM International. - Metal Park, OH, 1948.
• [8] Kurzydłowski K.J., Nykyforchyn H. Degradacja wodorowa materiałów konstrukcyjnych w przemyśle energetycznym i petrochemicznym. Problemy Eksploatacji 51/4 (2003). ss. 7- 18.
• [9] Nykyforchyn H.M., Student O.Z., Loniuk RP. Express method of evaluation of high temperature hydrogen degradation of structural steels. Proc. Polish-Japanese Symp. "Environmenta1 effects on high techno1ogy materials", Zakopane, 1997. - Warsaw: Inst. Phys. Chem. Po1ish Academy of Sciences, 1997. pp. 161-166.
• [10] Student O.Z., Lonyuk RP. Fatigue crack growth in 15Kh2MFA steel subjected to aging in high-temperature hydrogen. Materials Science 4 (1997). pp. 532-538.
• [11] Babij L., Zagórski A., Student O. Effect of the 2,25Cr-Mo- V steel degradation in service conditions on its creep in hydrogen. Proc. Problems of Corrosion and Corrosion Protection of Materials, Lviv 2006. - Lviv: Karpenko Physico-Mechanical Institute NASU, 2006. V. 1., Special Issue "Physico-Chemical Mechanics of Materials", Nr 5 pp. 227-232.