The structure and mechanical properties of the AK12D (Al–Si–Cu–Ni–Mg) aluminum alloy subjected to friction stir processing

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Abstract

The application of friction stir processing (FSP) to modify the structure of the Al–Si alloys, in particular the fragmentation of large silicon particles, can lead to an increase in the level of mechanical properties. This work is aimed to study features of local surface hardening of AK12D aluminum alloy (Al–Si–Cu–Ni–Mg system) during FSP and subsequent T6 hardening heat treatment. The authors investigated the influence of FSP and subsequent heat treatment parameters on the structure, microhardness, and hardness of the AK12D alloy. FSP was carried out at speeds of processing tool rotation and traverse of 2000 rpm and 8, 16 mm/min, respectively. The subsequent hardening T6 heat treatment was carried out according to the standard regime for the AK12D alloy. The paper shows that the FSP mode at a rotation speed of 2000 rpm and a traverse speed of 8 mm/min contributed to the formation of a monolithic and defect-free treatment zone. The study revealed that the formed microstructure is heterogeneous due to the influence of various thermomechanical effects. The most intense structural changes occurred in the stir zone. Friction stir processing and subsequent heat treatment led to fragmentation and partial dissolution of intermetallide particles in the α-Al solid solution followed by its decomposition and formation of secondary hardening phases. Moreover, the FSP and T6 heat treatment led to the formation of quasi-equiaxed fine-grained structure. The AK12D alloy microhardness after treatment under the study varied nonmonotonically and depended on the structure in different zones. At the same time, the Brinell hardness values after FSP and subsequent T6 heat treatment increased compared to the initial heat-treated state.

About the authors

Gulnara R. Khalikova

Institute for Metals Superplasticity Problems of the RAS, Ufa;
Ufa State Petroleum Technological University, Ufa

Author for correspondence.
Email: gulnara.r.khalikova@gmail.com
ORCID iD: 0000-0002-6712-8469

PhD (Engineering), senior researcher, assistant professor of Chair “Technological Machines and Equipment”, assistant professor of Chair “Technology of Metals in Oil-and-Gas Engineering”

Russian Federation

Gulnaz R. Zakirova

Ufa State Petroleum Technological University, Ufa

Email: gulnazzakirova@mail.ru

graduate student of Chair “Technological Machines and Equipment”

Russian Federation

Artur I. Farkhutdinov

Ufa State Petroleum Technological University, Ufa

Email: artur98f@gmail.com

graduate student of Chair “Technology of Metals in Oil-and-Gas Engineering”

Russian Federation

Elena A. Korznikova

Institute for Metals Superplasticity Problems of the RAS, Ufa;
Ufa State Aviation Technical University, Ufa

Email: elena.a.korznikova@gmail.com
ORCID iD: 0000-0002-5975-4849

Doctor of Science (Physics and Mathematics), leading researcher, Head of the Research Laboratory “Metals and Alloys under the Extreme Conditions”

Russian Federation

Vadim G. Trifonov

Institute for Metals Superplasticity Problems of the RAS, Ufa;
Ufa State Petroleum Technological University, Ufa

Email: vadimt@anrb.ru
ORCID iD: 0000-0002-8187-1355

PhD (Engineering), leading researcher, assistant professor of Chair “Technology of Metals in Oil-and-Gas Engineering” 

Russian Federation

References

  1. Heidarzadeh A., Mironov S., Kaibyshev R., Çam G., Simar A., Gerlich A., Khodabakhshi F., Mostafaei A., Field D.P., Robson J.D., Deschamps A., Withers P.J. Friction stir welding/processing of metals and alloys: a comprehensive review on microstructural evolution. Progress in Materials Science, 2021, vol. 117, article number 100752. doi: 10.1016/j.pmatsci.2020.100752.
  2. Zykova A.P., Tarasov S.Yu., Chumaevskiy A.V., Kolubaev E.A. A Review of friction stir processing of structural metallic materials: process, properties, and methods. Metals, 2020, vol. 10, no. 6, article number 772. doi: 10.3390/met10060772.
  3. Cheng W., Liu C.Y., Ge Z.J. Optimizing the mechanical properties of Al–Si alloys through friction stir processing and rolling. Materials Science and Engineering A, 2021, vol. 804, article number 140786. doi: 10.1016/j.msea.2021.140786.
  4. Abboud J., Mazumder J. Developing of nano sized fibrous eutectic silicon in hypereutectic Al–Si alloy by laser remelting. Scientific Reports, 2020, vol. 10, no. 1, article number 12090. doi: 10.1038/s41598-020-69072-1.
  5. Sun H., Yang S., Jin D. Improvement of microstructure, mechanical properties and corrosion resistance of cast Al–12Si alloy by friction stir processing. Transactions of the Indian Institute of Metals, 2018, vol. 71, no. 4, pp. 985–991. doi: 10.1007/s12666-017-1232-5.
  6. Ma Z.Y., Sharma S.R., Mishra R.S. Microstructural modification of as-cast Al-Si-Mg alloy by friction stir processing. Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, 2006, vol. 37, no. 11, pp. 3323–3336. doi: 10.1007/BF02586167.
  7. Belov N.A. Fazovyy sostav promyshlennykh i perspektivnykh alyuminievykh splavov [Phase composition of industrial and prospective aluminium alloys]. Moscow, MISiS Publ., 2010. 511 p.
  8. Khalikova G.R., Korznikova G.F., Trifonov V.G. Phases changes of the AK12MMgN-18%SiCp composite alloy after severe plastic deformation and annealing. Letters on Materials, 2017, vol. 7, no. 1, pp. 3–7. doi: 10.22226/2410-3535-2017-1-3-7.
  9. Mishra R.S., Ma Z.Y. Friction stir welding and processing. Materials Science and Engineering R: Reports, 2005, vol. 50, no. 1-2, pp. 1–78. doi: 10.1016/j.mser.2005.07.001.
  10. Sato Y.S., Kokawa H., Enomoto M., Jogan S. Microstructural evolution of 6063 aluminum during friction-stir welding. Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, 1999, vol. 30, no. 9, pp. 2429–2437. doi: 10.1007/s11661-999-0251-1.
  11. Smith Ch.B. Chapter 11. Robots and Machines for Friction Stir Welding/Processing. Friction stir welding and processing. Ohio, ASM International Publ., 2007, pp. 219–233.
  12. Hirata T., Oguri T., Hideki H., Tanaka T., Chung S.W., Takigawa Y., Higashi K. Influence of friction stir welding parameters on grain size and formability in 5083 aluminum alloy. Materials Science and Engineering A, 2007, vol. 456, no. 1-2, pp. 344–349. doi: 10.1016/j.msea.2006.12.079.
  13. Kalashnikova T., Chumaevskii A., Kalashnikov K., Fortuna S., Kolubaev E., Tarasov S. Microstructural analysis of friction stir butt welded Al-Mg-Sc-Zr alloy heavy gauge sheets. Metals, 2020, vol. 10, no. 6, pp. 1–20. doi: 10.3390/met10060806.
  14. Srivatsan T.S., Vasudevan S., Park L. The tensile deformation and fracture behavior of friction stir welded aluminum alloy 2024. Materials Science and Engineering A, 2007, vol. 466, no. 1-2, pp. 235–245. doi: 10.1016/j.msea.2007.02.100.
  15. Adamowski J., Gambaro C., Lertora E., Ponte M., Szkodo M. Analysis of FSW welds made of aluminium alloy AW6082-T6. International OCSCO World Press, 2007, vol. 28, no. 8, pp. 453–460.
  16. Krishnan K.N. On the formation of onion rings in friction stir welds. Materials Science and Engineering A, 2002, vol. 327, no. 2, pp. 246–251. doi: 10.1016/S0921-5093(01)01474-5.
  17. Xu S., Deng X. A study of texture patterns in friction stir welds. Acta Materialia, 2008, vol. 56, no. 6, pp. 1326–1341. doi: 10.1016/j.actamat.2007.11.016.
  18. Chen X.-G., da Silva M., Gougeon P., St-Georges L. Microstructure and mechanical properties of friction stir welded AA6063–B4C metal matrix composites. Materials Science and Engineering A, 2009, vol. 518, no. 1-2, pp. 174–184. doi: 10.1016/j.msea.2009.04.052.
  19. Dialami N., Cervera M., Chiumenti M. Defect formation and material flow in friction stir welding. European Journal of Mechanics, A/Solids, 2020, vol. 80, article number 103912. doi: 10.1016/j.euromechsol.2019.103912.
  20. Maji P., Nath R.K., Karmakar R., Paul P., Meitei R.K.B., Ghosh S.K. Effect of post processing heat treatment on friction stir welded/processed aluminum based alloys and composites. CIRP Journal of Manufacturing Science and Technology, 2021, vol. 35, pp. 96–105. doi: 10.1016/j.cirpj.2021.05.014.

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