Obrabotka metallov

OBRABOTKA METALLOV

METAL WORKING AND MATERIAL SCIENCE
Print ISSN: 1994-6309    Online ISSN: 2541-819X
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Vol. 27, No 3 July – September 2025

Evaluation of the level of hardening of aluminum alloy chips intended for subsequent pressure treatment

Vol. 23, No 1 January - March 2021
Authors:

Loginov Yuri,
Zagirov Nickolay,
Ivanov Evgeniy
DOI: http://dx.doi.org/10.17212/1994-6309-2021-23.1-45-55
Abstract

Introduction. It is noted that the chip is an undesirable type of metal scrap, because it has a developed surface, which creates conditions for more intense interaction with the surrounding atmosphere. This creates conditions for oxidation and gas saturation, especially at elevated temperatures typical of remelting processes. Therefore, the process of chip utilizing is considered, bypassing the remelting stage. The aim of the work is to establish the level of work hardening of chips during the processing of aluminum alloys and to predict its effect on the subsequent processing process. Research methods: to assess the deformed state, the finite element method was applied, implemented in the RAPID-2D software package. The sequence of actions included the creation of the initial shape of the deformation region and the configuration of the tool. The mutual displacement of the tool and the deformable material is specified using the corresponding boundary conditions. The deformable medium is a viscous-plastic material with power-law hardening, the physical and mechanical properties correspond to an aluminum-magnesium alloy. Results and discussion: the solution obtained shows that the degree of shear deformation in the chips can reach a value of more than 2. In this case, a higher level of deformation is localized on the side of the convex part of the chip. The comparison of the solution with those obtained earlier by other authors is carried out and its similarity is shown. In the considered solution, the difference in the degree of work-hardening of the chips along its thickness is 36 %. A variant of the sequence of processing the workpiece first by cold deformation, and then by cutting is considered. The field of application of the results of the work is the development of methods for the processing of technogenic formations. Conclusions. During the cutting process, the plastic deformation of the chips reaches significant values. In this paper, the difference in the degree of shear deformation in the chip thickness is established, depending on the proximity of the cut layer to the surface of the cutting tool. It is proposed to take this difference into account at the subsequent stages of chip processing. The presence of the marked inhomogeneity of mechanical properties leads to consequences in the form of an inhomogeneous distribution of the temperature of the beginning of recrystallization during subsequent operations of heat treatment or hot deformation treatment. The principle of additivity of the degree of deformation obtained by the metal at the stage of plastic shaping of the workpiece and the shaping of the chip itself is introduced.


Keywords: Technogenic formations, chip processing, aluminum alloy, finite element method, plastic deformation

References

1. Yaroslavtsev V.M., Yaroslavtseva N.A. The perfection of technology for recycling steel chips. Chernye Metally, 2018, vol. 12, pp. 66–71.



2. Abd El Aal M.I., Taha M.A., Selmy A.I., El-Gohry A.M., Kim H.S. Solid state recycling of aluminium AA6061 alloy chips by hot extrusion. Materials Research Express, 2019, vol. 6, iss. 3, p. 036525. DOI: 10.1088/2053-1591/aaf6e7.



3. Lui E.W., Palanisamy S., Dargusch M.S., Xia K. Effects of chip conditions on the solid state recycling of Ti-6Al-4V machining chips. Journal of Materials Processing Technology, 2016, vol. 238, pp. 297–304. DOI: 10.1016/j.jmatprotec.2016.07.028.



4. Chiba R., Nakamura T., Kuroda M. Solid-state recycling of aluminium alloy swarf through cold profile extrusion and cold rolling. Journal of Materials Processing Technology, 2011, vol. 211 (11), pp. 1878–1887. DOI: 10.1016/j.jmatprotec.2011.06.010.



5. Zagirov N.N., Sidelnikov S.B., Loginov Yu.N., Sokolov R.E. Sravnitel'nyi analiz tekhnologii izgotovleniya svarochnoi provoloki iz evtekticheskogo silumina s primeneniem sovmeshchennykh metodov obrabotki [Comparative analysis of technologies of welding wire production from eutectic silumin using combined processing methods]. Tsvetnye metally = Non-ferrous metals, 2017, no. 4, pp. 86–92. DOI: 10.17580/tsm.2017.04.13.



6. Moungomo J.B.M., Kouya D.N., Songmene V. Aluminium machining chips formation, treatment and recycling: a review. Engineering Materials, 2016, vol. 710, pp. 71–76. DOI: 10.4028/www.scientific.net/KEM.710.71.



7. Wan B., Chen W., Lu T., Liu F., Jiang Z., Jiang Z., Mao M. Review of solid state recycling of aluminum chips. Resources, Conservation and Recycling, 2017, vol. 125, pp. 37–47. DOI: 10.1016/j.resconrec.2017.06.004.



8. Buchkremer S., Klocke F., Lung D. Analytical study on the relationship between chip geometry and equivalent strain distribution on the free surface of chips in metal cutting. International Journal of Mechanical Sciences, 2014, vol. 85, pp. 88–103. DOI: 10.1016/j.ijmecsci.2014.05.005.



9. Shi Q., Hao Z., Wang S., Fu X., Wang H. Control and mechanism analysis of serrated chip formation in high speed machining of aluminum alloy 7050-t7451. Materials Science Forum, 2020, vol. 990, pp. 13–17. DOI: 10.4028/www.scientific.net/MSF.990.13.



10. Koch A., Wittke P., Walther F. Computed tomography-based characterization of the fatigue behavior and damage development of extruded profiles made from recycled AW6060 aluminum chips. Materials, 2019, vol. 12 (15), p. 2372. DOI: 10.3390/ma12152372.



11. Koch A., Bonhage M., Teschke M., Luecker L., Behrens B.-A., Walther F. Electrical resistance-based fatigue assessment and capability prediction of extrudates from recycled field-assisted sintered EN AW-6082 aluminium chips. Materials Characterization, 2020, vol. 169, p. 110644. DOI: 10.1016/j.matchar.2020.110644.



12. Güley V., Güzel A., Jäger A., Ben Khalifa N., Tekkaya A.E., Misiolek W.Z. Effect of die design on the welding quality during solid state recycling of AA6060 chips by hot extrusion. Materials Science and Engineering A, 2013, vol. 574, pp. 163–175. DOI: 10.1016/j.msea.2013.03.010.



13. Loginov Yu.N. Resheniya tekhnologicheskikh zadach pressovaniya s primeneniem sistemy analiza protsessov plasticheskogo deformirovaniya "RAPID 2D" [Solutions of technological problems of pressing using the system of analysis of plastic deformation processes "RAPID 2D"]. Ekaterinburg, UGTU-UPI Publ., 2007. 78 p. ISBN 978-5-321-01026-6.



14. Fan X., Suo T., Sun Q., Wang T. Dynamic mechanical behavior of 6061 Al alloy at elevated temperature sand different strain rates. Acta Mechanica Solida Sinica, 2013, vol. 26, iss. 2, pp. 111–120. DOI: 10.1016/S0894-9166(13)60011-7.



15. Tucker M.T., Horstemeyer M.F., Whittington W.R., Solanki K.N., Gullett P.M. The effect of varying strain rates and stress states on the plasticity, damage, and fracture of aluminum alloys. Mechanics of Materials, 2010, vol. 42, pp. 895–907. DOI: 10.1016/j.mechmat.2010.07.003.



16. Chen Y., Clausen A.H., Hopperstad O.S., Langseth M. Stress–strain behaviour of aluminium alloys at a wide range of strain rates. International Journal of Solids and Structures, 2009, vol. 46, pp. 3825–3835. DOI: 10.1016/j.ijsolstr.2009.07.013.



17. Pan H., Liu J., Choi Y., Xu C., Bai Y., Atkins T. Zones of material separation in simulations of cutting. International Journal of Mechanical Sciences, 2016, vol. 115–116, pp. 262–279. DOI: 10.1016/j.ijmecsci.2016.06.019.



18. Mabrouki T., Courbon C., Zhang Y., Rech J., Nélias D., Asad M. Some insights on the modelling of chip formation and its morphology during metal cutting operations. Comptes Rendus Mecanique, 2016, vol. 344 (4), pp. 335–354. DOI: 10.1016/j.crme.2016.02.003.



19. Denguir L.A., Outeiro J.C., Fromentin G., Vignal V., Besnard R. Orthogonal cutting simulation of OFHC copper using a new constitutive model considering the state of stress and the microstructure effects. Procedia CIRP, 2016, vol. 46, pp. 238–241. DOI: 10.1016/j.procir.2016.03.208.



20. Kolpashnikov A.I. Prokatka listov iz legkikh splavov [Rolling of light alloy sheets]. Moscow, Metallurgiya Publ., 1979. 264 p.



21. Zagirov N.N., Loginov Y.N., Sidel’nikov S.B., Ivanov E.V. Alternative technology for manufacturing rod–wire products from AK12 silumin. Metallurgist, 2018, vol. 62 (5–6), pp. 587–596. DOI: 10.1007/s11015-018-0696-9.

Acknowledgements. Funding

The work is performed with financial support of the Government of the Russian Federation, Act No. 211, Contract No. 02.A03.21.0006.

For citation:

Loginov Yu.N., Zagirov N.N., Ivanov E.V. Evaluation of the level of hardening of aluminum alloy chips intended for subsequent pressure treatment. Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science, 2021, vol. 23, no. 1, pp. 45–55. DOI: 10.17212/1994-6309-2021-23.1-45-55. (In Russian).

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