| 2004 №04 (05) | 2004 №04 (07) |
The Paton Welding Journal, 2004, #4, 21-26 pages
Comparison of impact toughness values of Charpy and Mesnager specimens at tough fracture
V.P. Dyadin
E.O. Paton Electric Welding Institute of the NASU 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine.Abstract
Approach to analytical comparison of the tough fracture energy of Mesnager and Charpy specimens and their components is considered. Simple relationship is suggested allowing the values of impact toughness of the Charpy specimens to be determined from the results of testing the upper shelf of Mesnager specimens.
Keywords: welded joint, impact toughness, specific energy, Charpy and Mesnager specimens, fibre content in the fracture, strain ageing, upper shelf
References
1. Girenko, V.S., Dyadin, V.P. (1985) Relationships between the impact toughness and fracture mechanics criteria 8k, Klc of structural steels and their welded joints. Avtomatich. Svarka, 9, 13-20.2. Girenko, V.S., Dyadin, V.P. (1990) Correlation of characteristics of crack-resistant materials and welded joints with standard mechanical test results, Ibid., 6, 1-4.
3. Girenko, V.S., Dyadin, V.P. (1993) Relationships between the impact toughness and fracture mechanics criteriaIc, KIc of structural steels and their welded joints. In: Coll, of abstr. of ICF-8 on Fracture Mechanics: Successes and Problems, Kiev, July 8-14, 1993. Lviv.
4. Girenko, V.S. (1995) Some approaches for evaluation of static crack resistance of metallic materials and welded joints. Avtomatich. Svarka, 9, 74-77.
5. Bashmakov, V.E., Georgiev, M.N., Kolodyuk, V.P. et al. (1983) Comparison of critical brittleness temperatures determined on specimens with different stress concentrators. Zavod. Laboratoriya, 9, 77-81.
6. Shishkin, V.Yu., Makurin, V.A., Efimov, P.I. (1987) On notch shape in impact specimens and impact toughness values. Ibid., 3, 71-74.
7. Basko, E.M. (1989) Influence of notch sharpness on impact toughness and critical brittleness temperatures of structural stems. Ibid., 7, 73-77.
8. Safta, V., Bernat, A., Mojsa, T. (1981) Relationship between the characteristics of dynamic fracture toughness. Ibid., 7, 72-75.
9. Drozdovsky, B.A., Fridman, Ya.B. (1960) Influence of cracks on mechanical properties of structural steels. Moscow: Metallurgizdat.
10. Gulyaev, A.P. (1967) Division of impact toughness into its components according to the data of testing of different notch specimens. Zavod. Laboratoriya, 4, 473-475.
11. Georgiev, M.N., Popova, L.V. (1969) Comparison of methods of impact toughness division. Ibid., 5, 605-611.
12. Vladimirsky, T.A. (1969) On problem of impact toughness division into its components. Ibid., 5, 612-615.
13. Rakhmanov, A.S., Livshits, L.S. (1959) On the role of notch sharpness in impact toughness testing. Ibid., 12, 1502-1504.
14. Shermazan, I.V., Zelenova, V.D. (1969) Comparison of different methods of impact toughness division. Ibid., 5, 611-612.
15. Gulyaev, A.P. (1970) On determination of crack propagation energy. Ibid., 12, 1494-1497.
16. Panasyuk, V.V., Romaniv, O.M. (2001) Charpy and fracture toughness data: limitations and advantages in evaluation of the embrittlement of metals. In: Proc, of ESSIS Charpy Centenary Conf., Poitiers, Oct. 2-5, 2001. Vol. 2. Paris.
17. Girenko, V.S. (1997) Widening fracture mechanics applications for evaluation of crack resistance of welded structure components under static loading. Syn. of Thesis for Dr. of Techn. Sci. Degree. Kiev: PWI.
18. Peterson, R. (1977) Coefficients of stress concentration. Moscow: Mir.
19. Kachanov, L.M. (1956) Principles of plasticity theory. Moscow: Gostekhizdat. 20. Dyadin, V.P. (1998) Development of a method for evaluation of material and welded joint resistance to stable crack growth under static loading. Syn. of Thesis for Cand. of Techn. Sci. Degree. Kiev: PWI