| 2004 №12 (02) | 2004 №12 (04) |
The Paton Welding Journal, 2004, #12, 16-25 pages
Analysis of the mechanism of joining and formation of viscous layer in friction stir welding
R. Ciric1, S. Cantrak2, K. Raic2
1Higher Technical School, Cacak, Serbia and Monte Negro2Beograd University, Beograd, Serbia and Monte Negro
Abstract
Phenomena developing in the process of continuous friction stir welding of high-speed steel R6M5 to carbon steel 60 are considered. Mathematical expression to calculate radial displacements of metal directly up to the friction surface has been proposed and experimentally verified. Structure, phase composition and chemistry of a viscous layer, friction plane and neighbouring zones have been examined.
Keywords: friction stir welding, high-speed steel, carbon steel, plastic deformation, calculation of displacements, viscous layer, Joining mechanism, microstructure, phase composition
References
1. Vil, I.V. (1970) Friction welding of metals. Moscow: Mashinostroenie.2. Dennin, G. (1979) Optimierung von Einstellwerten fuer das Reibschweissen mit kontinuierlichem Antrieb. Fachinformationen von KUKA, 32.
3. Kreye, H., Wittkamp, J. (1975) Gefuegeaenderungen und Bindemechanismus beim Reibschweissen. Fachinformationen von KUKA, 19.
4. Khazanov, I.O. et al. (1997) Structure and properties in friction welded joints produced under superplasticity conditions in R6M5 steel. Welding Int., 11, 64–66.
5. Hasui, A. (1998) Effect of faying surface gradient in frictionwelding. Ibid., 10(12), 761 CIRIC 768.
6. Fukukasa, K. (1996) On the characteristics of the rotational contact plane a fundamental study of friction surfacing. Ibid, 7(10), 524–529.
7. Hasegawa, M., leda, T. (1999) Effect of welding condition on initial joining phenomena. Q. J. JWS, 1(17), 24–34.
8. Horn, H. (1987) Untersuchungen zum Bindemechanismus reibgeschweisster Wolframhartmetall-Stahl-Verbindungen. Schweissen und Schneiden, 10, 513–516.
9. Benzsak, G.J., North, Т.Н. (1996) Modelling of viscosity and fluid dynamics in similar friction joints. Transact, of JWRI, 25(2).
10. Ciric, R. (1986) Prilog analizi osobina trenjem zavarenog spoja celika C7680 sa Cl 730: magistarski rad. Beograd: Tehnolosko-metalurski fakultet Un-ta u Beogradu.
11. Ciric, R., Raic, K., Cantrak, S. Strukturne promene i me- hanizam spajanja kod rotacionog zavarivanja trenjem razlicitih celika (u pripremi).
12. Popandopulo, N.A., Tkachevskaya, D.G. (1977) Structure of metal in bright rings of lack of penetration in friction welding of high-speed steels. Metallovedenie i Term. Obrab. Metallov, 2, 64–65.
13. Servogin, A.S. (1976) Plastic deformation degree in friction welding of metals. Svarochn. Proizvodstvo, 8.
14. Roberts, W. (1986) ICSMA. Ed. by H.J. McQueen et al. Oxford: Pergamon Press.
15. Roberts, W. (1983) In deformation, processing and microstructure. Ed. by G. Krauss. Ohio: ASM, Metals Park.
16. Johnson, W.A., Mehl, R.F. (1939) Transact, of AIME, 135, 416.
17. Avrami, M. (1939) J. Chem. Phys., 7, 103.
18. Avrami, M. (1941) Ibid, 9, 177.
19. Kolmogorov, A.N. (1937) Izvestiya AN Ukr. SSR. Series Matematics, 1, 335.
20. Burke, J. (1980) The kinetics of phase transformations in metals. Oxford: Pergamon Press.
21. Radovi, N. (2000) Deformaciono i rekristalizaciono pona- sanje mikrolegiranih selika na visokim temperaturama: Dokt. dis. Beograd: Tehnolosko-metalurski fakultet Un-ta u Beogradu.
22. Roberts, W. et al. (1979) Dynamic recrystallization kine¬tics. Metals Science, 3/4, 195–203.
23. Fernandez, AT. et al. (2002) Static recrystallization mechanisms in a coarse-grained Nb-microalloyed austenite. J. Metallurg. and Materials Transact., 33A(1O), 3089–3098.
24. Devadas, C. et al. (1991) Metallurg. Transact., 22A, 321–333.
25. Baragar, D.L. (1987) J. Meeh. Working Techn., 14, 295–307.
26. Sankar, J. et al. (1979) Metals Techn., 6, 325–330.
27. Sellars, C.M., McTegart, W.J. (1966) Acta Metallurg., 14, 1136–1138.
28. Polukhin, I.P., Gun, Ya.G. (1976) Resistance of metals and alloys to plastic deformation. Refer, book. Moscow: Metallurgiya.
29. Suckjao, Na et al. (1984) Temperaturermittlung beim Reib¬schweissen ungleichartiger Werkstoffe in zylindrische Form-Messung und Berechnung. Schweissen und Schneiden, 4(36).
30. Fomichyov, I.N., Imshennik, P.K. (1981) Influence of intermediate layer formed in friction welding of high-speed steels to structural steels on strength of the joints. Svarochn. Pro¬izvodstvo, 2, 21–22.
31. Rodic, J. Razvoj orodnihjekel (1978) Eljezarski zbornik 4.
