| ArticleName |
Effect of the chemical
composition and high-temperature heating simulating a brazing operation on the structure
and mechanical properties of Al – Mn (–Mg) Alloy Sheets. Part I |
| Abstract |
Development of a novel AMts-type alloy with high corrosion resistance and good strength is an actual task for application in heat-exchangers which are used in new aircraft products. A thermodynamic simulation of phase composition in Thermo-Calc software was used to choose experimental alloys of Al – Mn system taking into account required solidus temperature for brazing. It is shown that the main influence in reducing of solidus temperature for investigated alloys is caused by magnesium and copper, and the less influence is caused by iron. Evaluation of strength degradation of cold-rolled sheets from experimental Al – Mn alloys after high-temperature heating simulating brazing operation showed that the lest reduction of strength is observed for alloys, which contain Fe and Si. A dependence of residual strength of sheets from (Fe + Si) content and amount of α-phase (Al15(Mn, Fe)3Si2) is determined. The peculiarities of the microstructure and mechanical properties of commercial clad sheets from a new Al – Mn – Mg alloy for application in aircraft heat-exchangers are investigated. By means of transmission electron microscopy and EDX-analysis it was concluded that the alloy in H24 temper has subgrain structure, which includes precipitations of dispersoids with spherical form, which are associated to α-phase (Al15(Mn,Cr, Fe)3Si2). Magnesium, which is used as main alloying element in the alloy, is almost completely dissolved in aluminum matrix, providing solid solution strengthening effect. Clad sheets from the alloy provide a high corrosion resistance (IGC < 0,08 mm) and good level of mechanical properties in H24 temper (UTS ≥ 180 MPa, YS ≥ 170 MPa, El. ≥ 10 %) and also good residual strength after brazing (UTS ≥ 150 MPa).
This research was carried out as part of the following comprehensive research project: Light High-Strength Corrosion-Resistant Weldable Alloys and Steels, Including Alloys and Steels with High Fracture Toughness (Strategic Development of Materials and Processing Techniques in the Period till 2030).
The authors would like to thank S. V. Samokhvalov and S. V. Shurtakov from Core facility “Climatic tests” — VIAM for research and advisory support and for their great contribution to the experiments apnd analysis of the obtained results. |
| References |
1. Kablov E. N., Dynin N. V., Benarieb I., Shchetinina N. D., Samokhva lov S. V. et al. Innovative aluminium alloys for soldered structures used in aircraft manufacturing. Zagotovitelnye proizvodstva v mashinostroenii. 2021. No. 4. pp. 179–192.
2. Antipov V. V. Prospective development of aluminium, magnesium and titanium alloys for aerospace applications. Aviatsionnye materialy i tekhnologii splavov. 2017. No. 5. pp. 186–194. DOI: 10.18577/2071-9140-2017-0-S-186-194.
3. Antipov V. V., Klochkova Yu. Yu., Romanenko V. A. Advanced aluminium and aluminium-lithium alloys. Aviatsionnye materialy i tekhnologii. 2017. No. 5. pp. 195–211. DOI: 10.18577/2071-9140-2017-0-S-195-211.
4. Grushko O. E. Aluminium alloys for automotive heat exchanger applications. All materials. Reference book. 2007. No. 2. pp. 2–8.
5. Grus hko O. E., Miller V. S. , Sheveleva L. M., Shein Yu. F. Core material structure and its influence on the solderability of alumin ium alloy 3003/4470 clad plates. Aviatsionnye materialy i tekhnologii. 2002. No. 2. pp. 96–103.
6. Benoit M. J., Jin H. et al. Microstructure evolution of warm deformed multilayered Al alloy sheet during brazing. Journal of Materials Processing Technology. 2020. Vol. 281. p. 116639.
7. Long L., Pan Q. L. et. al. Study on microstructure and mechanical properties of 3003 alloys with scandium and copper addition. Vacuum. 2020. Vol. 173. pp. 109–112.
8. Jin H., Zeng Y., Liang J., Kozdras M. S. Development of Al – Mn – Cu – Mg brazing sheet core alloys for automotive heat exchanger units for service at high temperatures. SAE International Journal of Materials and Manufacturing. 2015. No. 8, Iss. 3. pp. 736–743.
9. Shimosaka D., Ueno M. Effects of Si and Zr addition on strength and recrystallization behavior of Al – Mn alloy fin stocks for automotive heat exchanger. MATEC Web of Conferences. 2020. Vol. 326. p. 4.
10. Jin Xiaojie, Zhao Pizhi et al. Effect of Cu and Mg on the corrosion behavior of 40 04/Al–Mn/Cu–Mg/4004 aluminum alloy brazing sheet. MATEC Web of Conferences. 2020. Vol. 326, No 11. p. 04001.
11. Grigorenko V. B., Morozova L. V. Relationship between the conditions and duration of use of aluminium alloys like AMg4,5 and AMts and their structural deterioration. Trudy VIAM : elektronnyy nauchno-tekhnicheskiy zhurnal. 2017. No. 6. p. 54. DOI: 10.18577/2307-6046-2017-0-6-10-10.
12. Schölin K., Mannerskog B. Corrosion resistant aluminium radiator materials for vacuum and controlled atmosphere brazing. SAE Technical Paper. 1993. No. 931077. pp. 75–82.
13. Westergao rd R., Norgren S., Wass S. New high strength, long-life aluminium alloys with excellent sagging resistance for heat exchanger tube applications. SAE Technical Paper. 2005. p. 9.
14. Kablov E. N. Strategic development of materials and processing techniques in the period till 2030. Aviatsionnye materialy i tekhnologii. 2012. No. 5. pp. 7–17.
15. Belov N. A. Phase composition of industrial and innovative aluminium alloys: Monograph. Moscow : Izdatelskiy Dom MISiS, 2010. 511 p.
16. Belov N. A., Korotkova N. et al. Phase composition and mechanical properties of Al – 1,5% Cu – 1,5% Mn – 0,35% Zr (Fe, Si) wire alloy. Journal of Alloys and Compounds. 2019. Vol. 782. pp. 735–746.
17. Hirsch J., Grechnikova A. F., Aryshensky E. V., Drits A. M. Microstructural evolution and crystallographic texture in the produc tion of aluminium strips for food containers industry. Part 1. Tsvetnye Metally. 2018. No. 11. pp. 74–80. DOI: 10.17580/tsm.2018.11.09.
1 8. Kumar R., Gupta A. et al. Microstructure and texture development in AA3003 aluminium alloy. Materials Today Communications. 2020. Vol. 24. p. 100965.
19. Setyukov O. A. Effect of iron and silicon on the castability of aluminium alloys with manganese. Tekhnologiya legkikh splavov. 2010. No. 1. pp. 32–37.
20. Belov N. A., Korotkova N. O., Cherkasov S. O., Aksenov A. A. Electrical conductivity and hardness of Al – 1.5 % Mn and Al – 1.5 % Mn – 1.5 % Cu (wt.%) cold-rolled sheets: comparative analysis. Tsvetnye Metally. 2020. No. 4. pp. 70–76. DOI: 10.17580/tsm.2020.04.08.
21. Kemsies R. H., Milkereit B. et al. In situ DSC investigation into the kinetics and microstructure of dispersoid formation in Al – Mn – Fe – Si (–Mg) alloys. Materials and Design. 2018. Vol. 146. pp. 96–107.
22. Fridlyander I. N., Senatorova O. G., Osintsev O. E., Frolov K. V. Mechanical engineering: Encyclopedia. Vol. 2-3. Moscow : Mashinostroenie. Tsvetnye metally i splavy. Kompozitsionnye metallicheskie materialy. 2001. 880 p.
23. Kvasov F. I., Fridlyander I. N. Industrial aluminium alloys: Reference book. Moscow : Metallurgiya, 1984. pp. 28–37.
24. Archakova Z. N., Balakhontsev G. A., Basova I. G. et al. The structure and properties of semi-fini shed aluminium alloy products. Reference book, 2nd revised addition. Moscow : Metallurgiya, 1984. pp. 71–78.
25. Mondolfo L. F. Aluminum Alloys: Structure and Properties. Moscow : Metallurgiya, 1979. pp. 537–542.
26. Elagin V. I. Transition metal doping of wrought aluminium alloys. Moscow : Metallurgiya, 1975. pp. 65–66.
27. Kablov E. N., Duyunova V. A., Benarieb I., Puchkov Yu. A., Sbitneva S. V. Decomposition of supercooled solid solution during quenching of V-1341 alloy sheets. Tekhnologiya legkikh splavov. 2020. No. 3. pp. 20–33.
28. Ivanova A. O., Ryabov D. K., Antipov V. V., Pakhomkin S. I. Applicability of the software package Thermo-Calc for calculating the heat treatment parameters for alloy 1913 and the aluminium alloy atomization temperatures. Aviatsionnye materialy i tekhnologii. 2016. No. 43. pp. 44–51. DOI: 10.18577/2071-9140-2016-0-S1-52-59.
29. Chervyakova K. Y., Yakovleva A. O. et al. Effect of bismuth and lead on the phase composition and structure of the Al – 5%Si – 4%Cu – 4%Sn alloy. Russian Journal of Non-Ferrous Metals. 2019. Vol. 60, No. 3. pp. 239–246.
30. GOST 1497–84. Metals. Methods of tension test. Introdu ced: 01.01.1986. Moscow : Izdatelstvo standartov, 1984.
31. Tsukrov S. L., Burdina G. P., Basova I. G., Grigorieva N. Ya. A study on the temperature modes for rapid annealing of sheets made of AD0, AMg2 and AMts alloys. Tekhnologiya legkikh splavov. 1974. No. 7. pp. 61–68. |
