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

OBRABOTKAMETALLOV Vol. 23 No. 1 2021 TECHNOLOGY Conclusion During the cutting process, the plastic deformation of the chips reaches signi fi cant values. The paper shows the difference in the degree of shear deformation in the chip thickness depending on the proximity of the cut layer to the surface of the cutting tool. This difference is proposed to be considered at the subsequent stages of chip processing. The noted inhomogeneity of mechanical properties leads to an inhomogeneous temperature distribution of the recrystallization beginning during subsequent operations of heat treatment or hot deformation treatment. The additivity principle 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. 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 ElAal M.I., TahaM.A., SelmyA.I., El-GohryA.M., KimH.S. Solid state recycling of aluminiumAA6061 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 pro fi le 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.scienti fi c.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 alu- minum chips. Resources, Conservation and Recycling , 2017, vol. 125, pp. 37–47. DOI: 10.1016/j.rescon- rec.2017.06.004. 8. Buchkremer S., Klocke F., Lung D. Analytical study on the relationship between chip geometry and equiva- lent 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.scienti fi c.net/MSF.990.13. 10. Koch A., Wittke P., Walther F. Computed tomography-based characterization of the fatigue behavior and damage development of extruded pro fi les 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 fi eld-assisted sintered EN AW-6082 alu- minium 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 Engineer- ing 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.