The Paton Welding Journal, 2006, #4, 9-16 pages
Role of peak stresses in formation of cold cracks in welded joints of hardenable steels
Yu.A. Sterenbogen, D.V. Vasiliev, E.L. Demchenko, D.P. Novikova
E.O. Paton Electric Welding Institute of the NASU.
11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine.
Abstract
The paper presents analysis of the most important factors promoting cold cracking in welded Joints of hardenable steels. It is shown that the most important components causing cold cracking are «peak» stresses in as-hardened metal structure and level of hydrogen content in points of local «peak» stresses
Keywords: peak stresses, relaxation, microplastic deformation, hydrogen, delayed fracture, cold cracks, residual stresses, variable stresses
References
1. Shorshorov, M.Kh. (1965) Metals science of welding of steels and titanium alloys. Moscow: Nauka.
2. Shurakov, S.S. (1957) Relation between hardened steel strength and loading time. In: Coll. pap. on Materials Science. Leningrad: Sudpromgiz.
3. Makara, A.M., Mosendz, N.A. (1971) Welding of highstrength steels. Kiev: Tekhnika.
4. (1991) Welding and materials to be welded. Ed. by E.L. Makarov. Moscow: Metallurgiya.
5. Demchenko, E.L., Bovsunovsky, A.N., Yankina, O.I. (1990) Hydrogen effect on mechanical properties of austenitic-martensitic weld metal of 03Kh12N8M2GST type. Avto- matich. Svarka, 7, 30–33.
6. Kurdyumov, G.V., Utevsky, L.M., Entin, R.I. (1977) Transformations in iron and steel. Moscow: Nauka.
7. Sarrak, V.I., Filippov, G.A. (1975) Relaxation of residual microstresses in recovery and low-temperature tempering of hardened steel. Fizika Metallov i Metallovedenie, 40 (Issue 4), 806–811.
8. Bernshtejn, M.L., Zajmovsky, V.A. (1970) Structure and mechanical properties of metals. Moscow: Metallurgiya.
9. Alekseeva, L.E., Sarrak, V.I., Suvorova, S.O. et al. (1975) About two ways of residual microstress relaxation in marten¬site of steel. Metallofizika, Issue 61, 79–84.
10. Mazanec, K., Sejnoha, R. (1965) Effect of thermomechani¬cal treatment on mechanical properties of structural steels. Transact. Met. Soc. AIME, 233, 1602.
11. Grishchenko, L.V. (1961) New electrodes for welding of steel 15Kh2N4MDA. Svarochn. Proizvodstvo, 3, 22–26.
12. Gotalsky, Yu.N., Snisar, V.V., Demchenko, E.L. et al. (1990) Welding of high-strength steels with yield strength of more than 800 MPa without preheating or heat treatment. Avtomatich. Svarka, 10, 38–40.
13. Makarov, E.L. (1977) Nature of fracture at cold crack formation during welding of high-strength hardenable steels. In: Advanced technology of structural materials. Moscow: MVTU.
14. Makarov, E.L., Subbotin, Yu.V., Prokhorov, N.N. (1966) Ways of increase of steel resistance to cold cracking in welding. In: Strength of welded structures. Moscow: Mashinos- troenie.
15. Makara, A.M. (1960) Examination of the nature of cold near-weld cracks in welding of hardenable steels. Avto- matich. Svarka, 2, 9–33.
16. Makara, A.M., Gordonny, V.G., Dibets, A.T. et al. (1971) Cold transverse cracks in low-alloy high-strength welds. Ibid., 11, 1–14.
17. Sterenbogen, Yu.A., Vasiliev, D.V. (1998) New procedure and energy criteria for evaluation of welded joint fusion zone metal resistance to cold cracking. Ibid., 6, 8.
18. Lebedev, Yu.M., Danilyuk, K.M., Sterenbogen, Yu.A. et al. (1981) Influence of temporary welding stresses on the na¬ture of austenite transformation and resistance of HAZ in steel 30KhGSNA to cold cracking. Ibid., 7, 8–12.
19. Sterenbogen, Yu.A., Vasiliev, D.V. (1999) Evaluation of crack resistance of fusion zone using the energy capacity of delayed fracture. Ibid., 6, 6–12.
20. Sterenbogen, Yu.A., Savitsky, M.M., Vasiliev, D.V. Method of welded joint heat treatment. Pat. 47458 Ukraine. Publ. 15.07.2002.
21. Potak, Ya.M. (1972) High-strength steels. Moscow: Metal- lurgiya.
22. Kasatkin, S.B., Musiyachenko, V.F., Smiyan, O.D. (1974) Effect of heating on hydrogen distribution in high-strength steel welded joint. Avtomatich. Svarka, 5, 72–73.
23. Musiyachenko, V.F., Kasatkin, S.B. (1985) Hydrogen distribution in alloy steel welded joint and its effect on cold cracking (Review). Ibid., 9, 3–8.
24. Andrejkiv, A.A., Panasyuk, V.V., Kharin, V.S. (1978) Theoretical aspects of hydrogen brittleness kinetics of metals. Fiz.-Khim. Mekhanika Materialov, 3, 3–32.
25. Pokhodnya, I.K., Shvachko, V.I. (1997) Physical nature of hydrogen-induced cold cracks in structural steel welded joints. Avtomatich. Svarka, 5, 3–12.
26. Kasatkin, O.G. (1994) Specifics of hydrogen embrittlement of high-strength steels in welding (Review). Ibid., 1, 3–7.
27. Gindin, I.A., Starodubov, Ya.D., Aksyonov, V.K. (1980) Structure and strength properties of metals with an ex¬tremely distorted metal lattice (Review). Metallofizika, 2, 49–67.
Suggested Citation
Yu.A. Sterenbogen,
D.V. Vasiliev,
E.L. Demchenko,
D.P. Novikova (2006) Role of peak stresses in formation of cold cracks in welded joints of hardenable steels.
The Paton Welding J., 04, 9-16.