EFFECT OF ELECTRIC PULSING ON THE STRUCTURE, TEXTURE AND HARDNESS OF CRYOROLLED FINE-GRAIN COPPER

Mikhail Markushev, Irshat Valeev, Aygul Valeeva, Rafis Ilyasov, Elena Avtokratova, Stanislav Krymskiy, Oleg Sitdikov

DOI Number
10.22190/FUME220127030M
First page
Last page

Abstract


A synergy effect of cryorolling and high-dense electric pulsing on the structure, texture and hardness of fine-grain Cu is analyzed. More than twice Cu strengthening under rolling with 90% reduction at –196°С was caused by strong rolling texture and work-hardened nanostructure with ~300 nm crystallites and ~30% fraction of high-angle boundaries. Further single pulsing with current intensity Kj = 3.5×104 A2s/mm4 resulted in a static recovery and slight Cu softening due to the formation of a more equilibrium structure with lower dislocation density and lattice microstrain. Increasing Kj to 3.8×104 A2s/mm4 led to a sharp drop in the Cu hardness owing to continuous recrystallization and texture randomization. At Kj near 5.0×104 A2s/mm4 homogeneous ultrafine-grain structure with 1 μm defect free equiaxed grains and about 30% of twin boundaries is formed. Normal grain growth to 3 µm and gradual decrease of the Cu hardness were taking place at higher pulsing energies, up to 8.1×104 A2s/mm4.

Keywords

Copper, Cryorolling, Electric Pulsing, Structure, Texture, Hardness

Full Text:

PDF

References


GOST 21957-76, 2005, Cryogenic Technics. Terms and Conditions, International Standard. Standardinform, Мoscow, Russia, 7 p.

Humphreys, F.J., Hatherly, M., 2004, Recrystallization and related annealing phenomena, Oxford, Great Britain, 658 p.

Konkova, T., Mironov, S., Korznikov, A., Semiatin, S.L., 2010, Microstructural response of pure copper to cryogenic rolling, Acta Materialia, 58, pp. 5262-5273.

Ma, E., 2006, Eight routes to improve the tensile ductility of bulk nanostructured metals and alloys, Journal of Materials, 58. pp. 49-53.

Shanmugasundaram, T., Murty, B.S., Subramanya Sarma, V., 2006, Development of ultrafine grained high strength Al–Cu alloy by cryorolling, Scripta Materialia, 54, pp. 2013-2017.

Krymskiy, S., Sitdikov, O., Avtokratova, E., Markushev, M., 2020, 2024 aluminum alloy ultrahigh-strength sheet due to two-level nanostructuring under cryorolling and heat treatment, Transactions of Nonferrous Metals Society of China (English Edition), 30, pp. 14-26.

Samigullina, A.A., Mukhametgalina, A.A., Sergeyev, S.N., Zhilyaev, A.P., Nazarov, A.A., Zagidullina, Yu.R., Parkhimovich, N.Yu., Rubanik, V.V., Tsarenko, Yu.V., 2018, Microstructure changes in ultrafine-grained nickel processed by high pressure torsion under ultrasonic treatment, Ultrasonics, 82, pp. 313–321.

Samigullina, A.A., Mukhametgalina, A.A., Nazarov, A.A., Parkhimovich, N.Yu., Zhilyaev, A.P., Tsarenko, Yu.V., Rubanik, V.V., 2018, Influence of ultrasound on the structure and properties of nickel processed by equal-channel angular pressing, IOP Conf. Series: Materials Science and Engineering 447, 012017.

Laketić, E.S., Rakin, M., Momčilović, M., Ciganović, J., Veljović, Đ., Cvijović-Alagić, I., 2021, Influence of laser irradiation parameters on the ultrafine-grained Ti45Nb alloy surface characteristics, Surface and Coatings Technology, 418, 127255.

Sarma, V.S., Wang, J., Jian, W.W., Kauffmann, A., Conrad, H., Freudenberger, J., Zhu, Y.T., 2010, Role of stacking fault energy in strengthening due to cryo-deformation of FCC metals, Materials Science and Engineering A, 527, pp. 7624-7630.

Voronova, L., Degtyarev, M., Chashchukhina, T., Gapontseva, T., Pilyugin, V., 2018, Formation and Stability of Ultrafine Structure of Commercial Purity Copper Deformed at 80 K, Letters on Materials, 8, pp. 424-428.

Konkova, T., Mironov, S., Korznikov, A.V., Korznikova, G., Myshlyaev, M.M., Semiatin, S.L., 2016, Grain growth during annealing of cryogenically-rolled Cu-30Zn brass, Journal of Alloys and Соmрounds, 666, pp. 170-177.

Konkova, T., Valeev, I., Mironov, S., Korznikov, A., Myshlyaev, M.M., Semiatin, S.L., 2014, Effect of electric-current pulses on grain-structure evolution in cryogenically rolled copper, Journal of Materials Research, 29, pp. 2727-2737.

Konkova, T., Valeev, I., Mironov, S., Korznikov, A., Korznikova, G., Myshlyaev, M.M., Semiatin, S.L., 2016, Microstructure response of cryogenically-rolled Cu-30Zn brass to electric-current pulsing, Journal of Alloys and Compounds, 659, pp. 184-192.

Valeev, I.Sh., Valeeva, A.Kh., Ilyasov, R.R., Sitdikov, O.Sh., Markushev, M.V., 2019, Structure and hardness of cold-rolled nickel after single and multiple electric pulse treatment, Letters on Materials, 9, pp. 447-450.

Ilyasov, R.R., Valeeva, A.Kh., Valeev, I.Sh., Sitdikov, O.Sh., Markushev, M.V., 2020, Effect of electric pulse treatment on the structure and hardness of nickel deformed at room and liquid nitrogen temperatures, IOP Conf. Series: Materials Science and Engineering, 1008, pp. 012006 (1-6).

Valeev, I.S., Valeeva, A.K., Ilyasov, R.R., Avtokratova, E.V., Krymskiy, S.V., Sitdikov, O.S., Markushev, M.V., 2021, Influence of electric pulse treatment on structure and hardness of cryorolled aluminum, Letters on Materials, 11, pp. 351-356.

Baranov, Yu.V., Troitskiy, O.A., Avraamov, Yu.S., Shlyapin, A.D., 2001, Physical basics of electro-impulse and electro-plastic treatments and new materials, Moscow, Russia, 844 p. (in Russian).

Liang, Ch.-L., Lin, K.-L., 2018, The microstructure and property variations of metals induced by electric current treatment: A review, Materials Characterization, 145, pp. 545-555.

Dobatkin, S.V., Salishchev, G.A., Kuznetsov, A.A., Kon’kova, T.N., 2007, Submicrocristalline structure in copper after different severe plastic deformation schemes, Materials Science Forum, 558-559, pp. 189–194.

Markushev, M.V., Ilyasov, R.R., Krymskiy, S.V., Valeev, I.S., Sitdikov, O.S., 2021, Structure and strength of fine-grain copper after cryorolling and single electrо-pulsing of different capacity, Letters on Materials, 11, pp. 491-496.

Nugmanov, D.R., Sitdikov O.Sh., Markushev, M.V., 2013, On the comparison of texture data obtained by X-ray diffraction and EBSD analysis of a fine-grained magnesium alloy, Prospective Materials, S15, pp. 101-105 (in Russian).

Humphreys, F.J., 2004, Characterization of fine-scale microstructures by electron backscatter diffraction (EBSD), Scripta Materialia, 51, pp. 771-776.

Nowak, W.J., Ochał, K., Filip, R., Wierzba, B., 2021, The analysis of the residual stress evolution during cycling oxidation of the Ni-base superalloys at high temperature, Tehnički vjesnik, 28, pp. 540-547.

Yan, J., Li, W., Liu, H., Shen, Y., 2019, Reversion of sub-boundaries into dense dislocations in aluminum by electric pulsing treatment, Scripta Materialia, 167, pp. 86-90.

Vadlamani, S.S., Eickemeyer, J., Schultz, L., Holzapfel, B., 2007, Rolling and recrystallisation textures in Cu–Al, Cu–Mn and Cu–Ni alloys, Journal of Materials Science, 42, pp. 7586–7591.

Kestens, L.A.I., Pirgazi, H., 2016, Texture formation in metal alloys with cubic crystal structures, Materials Science and Technology, 32, pp. 1303-1315.

Kallend, J.S., Davies, G.J., 1972, The development of texture in copper and copper-zinc alloys, Texture, 1, pp. 51-69.

Kobayashi, C., Sakai, T., Belyakov, A., Miura, H., 2007, Ultrafine grain development in copper during multidirectional forging at 195 K, Philosophical Magazine Letters, 87, pp. 751-766.

Belyakov, A., Sakai, T., Miura, H., Kaibyshev, R., Tsuzaki, K., 2002, Continuous recrystallization in austenitic stainless steel after large strain deformation, Acta Materialia, 50, pp. 1547-1557.


Refbacks

  • There are currently no refbacks.


ISSN: 0354-2025 (Print)

ISSN: 2335-0164 (Online)

COBISS.SR-ID 98732551

ZDB-ID: 2766459-4