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METAL PROCESSING
ArticleName Properties of welded joints of sheets made of 1565CH (1565Ч) alloy in combination with other aluminum alloys
ArticleAuthor Drits A. M., Ovchinnikov V. V.
ArticleAuthorData

“ALCOA — Samara Metallurgical Plant” JSC, Moscow, Russia:

A. M. Drits, Executive Officer on Development of Business and Technologies, е-mail: Alexander.Drits@alcoa.com

 

Moscow State Industrial University, Moscow, Russia:
V. V. Ovchinnikov, Professor, Chair of Construction Materials Engineering

Abstract

There were researched the structure and properties of jump joints of the sheets, made of aluminium alloy 1565chM (1565чМ), with AMg5 (АМг5), AMg6 (АМг6), AV (6061) (АВ (6061)) and 7021 alloys. These sheets were made by argon-arc welding. The level of mechanical properties of such joints was defined together with areas of destruction of these joints, depending on the combination of welded alloys. Research results have shown that aluminium alloys AMg5, AMg6, AV T1 (АВ Т1) and 7021 can be successfully welded with 1565ch (1565ч) alloy and have a low turn to formation of shrinkage cracks. The 1565ch alloy belongs to Al – Mg – Mn system alloys with additional alloying of Zn, Zr and Cr. Mechanical properties of sheets, made of 1565ch alloy, are by 15–25% higher, than the same characteristics of AMg5 and AMg6 alloys. The 1565ch alloy has high plasticity parameters. Welded joints 1565ch + AMg5, 1565ch + AMg6 and 1565ch +AV are destructed on the area of thermal influence from AMg5, AMg6 and AV alloys. At the same time, welded joint 1565ch + 7021 is destructed from the 1565ch alloy. All these combinations of materials can be recommended for the usage for responsible welded joints of cisterns of gasoline tankers and freight cars. Welded joint between the 1565ch alloy has the biggest durability and plasticity. Durability of welded joint in other combinations is by 15–25% lower. There is researched the possibility of welding of 1565ch alloy with heat-treatment hardenable alloys of Al –Mg – Si (6061) system and Al – Zn – Mg system (7021). The welded joint between 1565ch and 6061 alloys is destructed on the area of thermal influence from the 6061 alloy. The welded joint between 1565ch and 7021 alloys is destructed on the area of thermal influence from the 1565ch alloy. Plasticity of welded seam with these combinations is near two times lower than plasticity of welded seam between the alloys of Al – Mg – Mn system. There was researched the corrosion resistance of sheets and welded joints from the 1565ch alloy. During the tests, according to the State Standard and ASTM, there was revealed that the 1565ch alloy and welded joint are resistant to intercrystalline corrosion and layer corrosion. Corrosion resistance of 1565ch alloy is at the level of this characteristics for the AMg5 alloy.

keywords Aluminium alloys, Al–Mg system alloys, 1565ch alloy, argon-arc welding, jump joints, macrostructure, mechanical properties
References

1. Fridlyander I. N. Alyuminievye deformiruemye konstruktsionnye splavy (Aluminium wrought structural alloys). Moscow : Metallurgiya, 1979. 208 p.
2. Oryshenko A. S., Osokin E. P., Barakhtina N. N., Drits A. M., Sosedkov S. M. Tsvetnye Metally — Non-ferrous metals. 2011. No. 11. pp. 84–90.
3. Drits A. M., Ovchinnikov V. V., Rastopchin R. N. Tekhnologiya legkikh splavov — Technology of light alloys. 2012. No. 3. pp. 20–29.
4. Drits A. M., Ovchinnikov V. V., Rastopchin R. N. Tsvetnye Metally — Non-ferrous metals. 2012. No. 12. pp. 85–89.
5. GOST 1480–80. Dugovaya svarka alyuminiya i alyuminievykh splavov v inertnykh gazakh. Soedineniya svarnye. Osnovnye tipy, konstruktivnye elementy i razmery (State Standard 1480–80. Arc welding of aluminium and aluminium alloys in inert gases. Welded joints. Basic types, constructional elements and sizes). Introduced: 1981–07–01. Moscow : Publishing House of Standards, 1990.
6. Shibalov M. V., Ananev A. I., Kurkov A. A. Svarochnoe proizvodstvo — Welding International. 2012. No. 9. pp. 8–11.
7. Ryazantsev V. I., Filatov Yu. A. Aviatsionnaya promyshlennost – Aviation industry. 2003. No. 1. pp. 13–17.
8. GOST 6996–66. Svarnye soedineniya. Metody opredeleniya mekhanicheskikh svoystv (State Standard 6996–66. Welded joints. Methods of definition of mechanical properties). Introduced : 1966–01–01. Moscow : Publishing House of Standards, 2006.
9. GOST 9.904–82. Edinaya sistema zashchity ot korrozii i stareniya. Splavy alyuminievye. Metod uskorennykh ispytaniy na rasslaivayushchuyu korroziyu (State Standard 9.904–82. Unified system of protection from corrosion and aging. Aluminium alloys. Method of accelerated testings on layer corrosion). Introduced : 1983–07–01. Moscow : Publishing House of Standards, 1983.
10. ASTM G66–99. Standard Test Method for Visual Assessment of Exfoliation Corrosion Susceptibility of 5XXX Series Aluminum Alloys (ASSET Test). West Conshohocken, 1999.
11. GOST 9.021–74. Edinaya sistema zashchity ot korrozii i stareniya. Alyuminiy i splavy alyuminievye. Metody uskorennykh ispytaniy na mezhkristallitnuyu korroziyu (State Standard 9.021–74. Unified system of protection from corrosion and aeging. Aluminium and aluminium alloys. Methods of accelerated testings on intercrystalline corrosion). Introduced : 1975–01–01. Moscow : Publishing House of Standards, 1978.
12. ASTM G67-04. Standard Test Method for Determining the Susceptibility to Intergranular Corrosion of 5XXX Series Aluminum Alloys by Mass Loss After Exposure to Nitric Acid. West Conshohocken, 2004.
13. Drits A. M., Ovchinnikov V. V. Weldability and properties of welds of high-strength aluminum alloys of the Al – Cu – Li system. Metal Science and Heat Treatment. 2012. Vol. 53, No. 9/10. pp. 445–449.
14. Ovchinnikov V. V. Naukoemkie tekhnologii v mashinostroenii — Science intensive technologies in mechanical engineering. 2011. No. 5. pp. 35–45.
15. Grushko O. E., Gureeva M. A., Ovchinnikov V. V. Zagotovitelnye proizvodstva v mashinostroenii — Storage productions in mechanical engineering. 2009. No. 3. pp. 11–21.
16. Ovchinnikov V. V. Zagotovitelnye proizvodstva v mashinostroenii — Storage productions in mechanical engineering. 2010. No. 3. pp. 43–48.
17. Drits A. M., Ovchinnikov V. V., Pakhomov D. A. Zagotovitelnye proizvodstva v mashinostroenii – Storage productions in mechanical engineering. 2012. No. 6. pp. 10–17.
18. Sinyavskiy V. S., Valkov V. D., Budov G. M. Korroziya i zashchita alyuminievykh splavov (Corrosion and protection of aluminium alloys). Moscow : Metallurgiya, 1979. 224 p.

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