| 2000 №04 (01) | 2000 №04 (03) |
The Paton Welding Journal, 2000, #4, 5-10 pages
Weldability of high-strength alloys of Al-Zn-Mg-(Cu) system (Review)
A.Ya. Ishchenko, V.O. Chapor
E.O. Paton Electric Welding Institute of the NASU 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine.Abstract
The problems of welding high-strength alloys of Al-Zn-Mg-(Cu) system are considered. The effect of chemical composition of alloys and filler material on the weldability characteristics is analyzed. Causes of defect formation in the welded joint are described. The problems of weldability and degree of metal weakening under the action of a thermal cycle depending on the method of welding are outlined. The further investigations for improving weldability of alloys of Al-Zn-Mg and Al-Zn-Mg-(Cu) systems are predicted.
Keywords: welding, heat treatment, aluminium alloys, zinc, magnesium, copper, scandium, weldability, welded joints, strength, toughness, hot cracks, porosity, corrosion cracking, service properties
References
1. Rabkin, D.M. (1986) Metallurgy of fusion welding of aluminium and its alloys. Kiev: Naukova Dumka.2. Mondolfo, L.F. (1976) Aluminium alloys structure and properties. London: Boston.
3. Kolachev, B.A., Livanov, V.A., Elagin, V.I. (1981) Metals science and heat treatment of non-ferrous metals and alloys. Moscow: Metallurgia.
4. Elagin, B.I., Zakharov, V.V., Filatov, Yu.A. (1996) About prospects of application of new high-strength weldable alloy 01570 (Al-Mg-Sc) in aircraft industry. In: Treatment of light and special alloys. Moscow: Metallurgia.
5. (1972) Aluminium. Metals science, treatment and application of aluminium alloys. Ed. by A.T. Tumanov, F.I. Kvasov, LN. Fridlyander. Moscow: Metallurgia.
6. Yoshida, EL, Uchida, H. (1993) Recent investigations and development of aluminium alloys for aircraft industry. Sumitomo Light Metal Techn. Rep., 34, 87 - 89.
7. (1972) Aluminium alloys. In: Weldable alloys. Ed. by LN. Fridlyander. Moscow: Metallurgia.
8. Mironenko, V.N., Evstifeev, B.S., Sharapov, V.V. (1981) Local heat treatment of welded joints of alloy 1911. Svarochnoye Proisvodstvo, 1, 17 - 19.
9. Itoh, G., Kuramoto, S., Kano, M. (1991) Effect of copper additions on tensile properties of alloy Al-4.4 Zn-1.4 Mg. J. Jap. Inst. Light Metals, 3, 184 - 191.
10. Lukasak, D.A., Hart, R.M. (1991) Aluminium alloy development efforts for compression dominated structure of aircraft. Light Metal Age., 9/10, 11-15.
11. Chayun, A.G., Labur, T.M., Yavorskaya, T.R. (1985) Selection of filler wire for welding high-strength aluminium-lithium alloy 1420. In: Actual problems of welding non-ferrous metals. Kiev: Naukova Dumka.
12. Fridlyander, I.N., Chuistov, K.V., Berezina, A.L. et al. (1992) Aluminium-lithium alloys. Structure and properties. Kiev: Naukova Dumka.
13. (1986) Aluminium-lithium alloys. In: Proc, of the 3rd Int. Conf, on Aluminium-Lithium, London, 1986. London: The Institute of Metals.
14. Elagin, B.I. (1994) New strengthening treatment of aluminium alloys using the retrogression. Tekhnologia Lyogkikh Splavov, 5/6, 5 - 10.
15. Elagin, B.I., Zakharov, V.V., Drits, A.M. (1982) Structure and properties of alloys of Al-Zn-Mg system. Moscow: Metallurgia.
16. Dobatkin, V.I., Elagin, V.I., Fyodorov, V.M. (1995) Quick-crystallized alloys. Moscow: VILS.
17. Fridlyander, I.N., Kutaitseva, E.I. (1956) High-strength aluminium alloy B95 (Al-Zn-Mg-Сu). Moscow: Metallurgia.
18. Sukhoverkhov, A.A., Postnova, A.A., Kurbatov, N.G. (1980) Effect of composition of filler wire on technological and mechanical properties of welded joints of alloy 01963. Aviats. Materialy, 4, 127 - 130.
19. Elagin, B.E, Zakharov, V.V. (1994) New trend in heat treatment of aluminium alloys. Metallovedeniye i Term. Obrabotka Metallov, 11, 30 - 35.
20. Polmear, I.J. (1981) Stress corrosion cracking in weldable Al-Zn-Mg alloys. Corros. Austral., 4, 4 - 9.
21. Nikolaev, G.A., Fridlyander, I.N., Arbuzov, Yu.P. (1990) Weldable aluminium alloys. Moscow: Metallurgia.
22. Sinyavsky, V. S., Valkov, V.D., Budov, G.M. (1979) Corrosion and protection of aluminium alloys system. Moscow: Metallurgia.
23. Sukhoverkhov, A.A. (1995) Towards the problems of weldability of alloys of Al-Zn-Mg-Cu system. Svarochnoye Proizvodstvo, 7, 11 - 15.
24. Zenkova, E.K., Kramotin, V.N., Maltsev, M.V. (1970) Kinetics of crack propagation in alloy ATsM at delayed fracture. Fiziko-khimicheskaya Mekhanika Materialov, 1, 30 - 34.
25. Zaitseva, N.I., Artyomova, M.S., Kadobnova, N.V. et al. (1980) Resistance to delayed fracture of welded joints of alloy of Al-Zn-Mg system. Aviats. Materialy, 4, 116 - 120.
26. Kramer, L.S., Tack, W.T., Fernandes, M.T. (1997) Modification on aluminium alloys via scandium additions. In: Proc. ALUMITECH'97, Atlanta, 1997. Atlanta.
27. Blewett, R.V. (1981) Aluminium alloys for structural use. FWPJ., 1, 73 -82.
28. Ohnishi, T., Yoshimura, K. (1987) Corrosion fatigue of aluminium alloy 7075. J. Jap. Inst. Light Metals, 2, 127 - 133.
29. Hunt, M. (1990) Aerospace aluminium. Mater. Eng., 8, 27 - 30.
30. Davydov, V.G., Elagin, B.E, Zakharov, V.V. et al. (1996) About alloying of aluminium alloys with additons of scandium and zirconium. Metallovedeniye i Term. Obrabotka Metallov, 8, 25 - 30.
31. Khan, G.M., Nikiforov, A.O., Zakharov, V.V. et al. (1993) Effect of scandium content on structure and characteristics of superplasticity of aluminium alloys of Al- Zn-Mg-Sc-Zr system. Tsvetnyye Metally, 11, 55 – 58.
32. Toropova, L.S., Dobatkina, T.V., Kamardinkin, A.N. (1992) Polythermal section of Al-Sc-Zr system. Metally, 5, 140 - 143.
33. Kishi, Y., Hirose, Y., Tsukuda, I. (1994) Effect of Cr, Mn, Mg content on characteristics of strength and stress corrosion cracking of extruded alloys of Al-Zn-Mg-Cu-La system. J. Soc. Mater. Sci., 485, 210 - 216.
34. Kishi, Y., Hirose, Y., Tsukuda, I. et al. (1994) Effect of Zr addition on microstructure and mechanical properties of extruded alloys of Al-Zn-Mg-La system with a high resistance to stress corrosion cracking. Ibid., 492, 1113 - 1119.
35. Kishi, Y., Tsukuda, I., Higashi, K. et al. (1994) The mechanical properties and SCC life of extruded Al-Zn-Mg-Cu La system alloys improved by Cr, Mn, Mg addition. In: Proc, of 4th int. Conf, on Offshore and Polar Eng., Osaka, 1994. Colorado: Golden.
36. Polmear, I.J. (1989) Development of high-strength aluminium alloys containing minor additions of silver. In: Austral, aeron. conf, on Res. and Technol., Melbourne, 1989. Melbourn: Barton.
37. Tomiharu, O., Takeru, M., Kazuyoshi, K. et al. Weldable high-strength aluminium alloy with a high resistance to the stress corrosion cracking. Pat. 4-13829 Japan, Int. Cl. C 22 C 21/10. Publ. 17.01.92.
38. Tomiharu, O., Takeru, M., Kazuyoshi, K. et al. Weldable high-strength aluminium alloy with a high resistance to the stress corrosion cracking. Pat. 4-13832 Japan, Int. Cl. C 22 С 21/10). Publ. 17.01.92.
39. Chuichi, O., Shigeyuki, K. Heat treatment of aluminium alloys of 7000 type. Pat. 62-142753 Japan, Int. Cl. C 22 F 1.053, C 22 C 21/10. Publ. 25.06.87.
40. Park, J.K. (1988) Influence of retrogression and reageing treatments on the strength and stress resistance of aluminium alloy 7075-T6. Mater. Sci. and Eng., 3, 223 -231.
41. Ohnishi, T., Ibaraki, Y., Itoh, T. (1988) Improvement of fracture toughness of aluminium alloy 7475 by RRA process (retrogression and reageing). J. Jap. Inst. Metals, 9, 872 - 877.
42. Ohnishi, T., Ibaraki, Y., Itoh, T. (1989) Improvement of fracture toughness in 7475 aluminium alloy by the RRA (retrogression and reageing) process. Mater. Trans. JIM, 8, 601 - 607.
43. Hashmi, F.H., Khan, A.Q. (1989) Creep properties of 7075 aluminium alloy under intermittent stressing. Pakistan J. Sci. and Ind. Res., 32, 141 144.
44. Pyun, S.-I., Choi J.-K. (1989) Some indices characterizing susceptibility to stress-corrosion cracking of Al-Zn-Mg-Cu alloy. J. Mater. Sci. Lett., 12, 1402 - 1404.
45. Rabkin, D.M., Dovbyshchenko, I.V., Dykhno, V.M. et al. (1989) Thermal state of electrode drops and porosity in welding aluminium and its alloys. In: Welding of non-ferrous metals. Kiev: Naukova Dumka.
46. Ohnishi, T., Itoh, T. (1989) Effect of retrogression and reageing treatments on stress corrosion cracking and fracture toughness of Al-Zn-Mg-Cu alloy. In: Proc, of 8th Int. Conf, on Strength of Metals and Alloys, Tampere, 1988. Oxford.
47. Brown, M.H., Staley, J.T., Liu, J. et al. Aluminium alloy product having improved combination of strength and corrosion resistance properties and method of producing the same. Pat. 4863528 USA, Int. Cl. C 22 F 1/04. Publ. 10.09.90.
48. Krivov, V.A., Ryabov, V.R., Ishchenko, A.Ya. et al. (1998) Welding in aircraft industry. Kiev: MIIBTs.
49. Alarcon, O.E., Nazar, A.M., Monteiro, W.A. (1991) The effect of microstructure on mechanical behaviour and fracture mechanism in a 7050-T76 aluminium alloy. Mater. Sci. and Eng., 2, 275 - 285.
50. Orman, L., Klyszewski, A. (1991) Effectiveness estimation of heat treatment practice of Al-Zn-Mg-Cu (7075) aluminium alloy as measured in hot compression test. Arch. Met., 4, 387 - 393.
51. Srivatsan, T.S. (1992) Microstructure, tensile properties and fracture behaviour of aluminium alloy 7150. J. Mater. Sci., 17, 4772 - 4781.
52. Dorey, G., Peel, C.J., Curtis, P.T. (1994) Advanced materials for aerospace structures. Proc. Inst. Meeh. Eng. ,1, 1 - 8.
53. (1995) New aluminium alloys in Boeings’s 777. Metal Bull., 8, 65.
54. Masao, K., Takeo, V., Masao, M. (1981) Characteristics of HAZ of welded joints of Al-Zn-Mg alloy after two-stage ageing. J. Jap. Inst. Light Metals, 3, 151 - 156.
55. Fyodorova, L.V., Osintsev, O.E., Fyodorov, V.M. (1995) Design strength and weldability of alloy 01949. In: New materials and technologies. Abstr. of pap. Moscow.
56. Dorn, L., Jahn, P., Doerk, P. (1981) Pulsed-arc welding of Al-4.5 Zn-1 Mg aluminium alloy. Schweiss. und Schneid., 12, 224 - 225.
57. Masatoshi, E., Shigetoshi, S. Combined filler material of aluminium. Pat. 3-169495 Japan, Int. Cl. В 23 К 35/02. Publ. 10.09.91.
58. Arai, K., Otsuka, Y., Tsukamoto, K. et al. Filler metal for welding alloys Al-Zn-Mg. Pat. 56-77358 Japan, Int. Cl. C 22 C 21/06, В 23 К 35/28. Publ. 25.06.81.
59. Beier, R. (1982) Welding of alloys on Al-Zn-Mg base. Anlag. + Verfahr., 4, 78, 81 - 82, 84.
60. Reznichenko, B.M., Nikitin, V.M. (1994) Effect of chemical composition of weld on mechanical properties of welded joints of alloy of Al-Zn-Mg system. In: New materials and technologies. Abstr. of pap. Mocow.
61. (1992) ALCOTEC filler metal 5180 (Al-Zn-Mg alloy family weld wire). Alloy Dig., 9, 3 - 4.
62. Zakharov, V.V., Rostova, T.D (1995) Alloying of alumi¬nium copper-containing alloys with scandium. Metallovedeniye i Term. Obrabotka Metallov, 2, 23 - 27.
63. Reznichenko, B.M. (1994) Effect of heat treatment on properties of welded joints of alloy of Al-Zn-Mg system. In: New materials and technologies. Abstr. of pap. Moscow.
64. Bondarev, A.A., Rabkin, D.M. (1974) Evaporation of easily-volatile elements in electron beam welding of aluminium alloys. Avtomaticheskaya Svarka, 3, 13 - 16.
65. Bondarev, A.A., Voropay, N M., Ishchenko, A.Ya. et al. (1972) Effect of technological factors of porosity of aluminium welds made by electron beam welding. Ibid., 8, 24 - 26.
66. Sharkov, A.N., Klykov, N.A., Bondarev, A.A. et al. (1978) Electron beam welding of aluminium alloy B93. Svarochnoye Proizvodstvo, 5, 17 - 18.
67. Bondarev, A.A. (1990) Investigation of weldability of high-strength alloy of Al-Zn-Mg system by using EBW. Avtomaticheskaya Svarka, 9, 36 -38.
68. Bondarev, A.A. (1984) State-of-the-art of equipment and advantages of process of electron beam welding structures of aluminium alloys. In: Welding of aluminium alloys of cryogenic and general purpose. Kiev: Naukova Dumka.
69. Alov, A.A. (1978) Effect of heredity on weldability of deformed prefabrications of alumfeium alloys. Avtomaticheskaya Svarka, 6, 37 - 39.
70. Elagin, B.I., Zakharov, V.V., Rostova, T.D (1994) Effect of scandium on structure and properties of alloy Al-5.5 Zn-2 0 Mg. Metallooedeniye i Term. Obrabotka Metallov, 7, 1 - 5.
71. Talaev, V.S., Sukhowerkhov A.A., Danilkin, V.A. (1979) Hydrogen distribution in welded joints of alloy of Al-Zn-Mg-Cu system. Soarochnoye Proizvodstvo, 9, 7 - 9.
72. Ishchenko, A.Ya., Dovbyshchenko, I.V., Budnik, V.P. et al. (1994) Advanced methods of welding aluminium alloys. Automatic. Svarka, 5/6, 35 – 37.