Structure and hardness of cold-rolled nickel after single and multiple electric pulse treatment

I.S. Valeev, A.K. Valeeva ORCID logo , R.R. Ilyasov, O.S. Sitdikov, M.V. Markushev show affiliations and emails
Received 10 October 2019; Accepted 21 October 2019;
Citation: I.S. Valeev, A.K. Valeeva, R.R. Ilyasov, O.S. Sitdikov, M.V. Markushev. Structure and hardness of cold-rolled nickel after single and multiple electric pulse treatment. Lett. Mater., 2019, 9(4) 447-450
BibTex   https://doi.org/10.22226/2410-3535-2019-4-447-450

Abstract

The nature of the processes controlling the changes in the structure and hardness of nickel depending on the number of cycles of electric pulse treatment is discussed.The structure and hardness of nickel Grade NP2 after rolling at room temperature with a strain of 90 % and subsequent electric pulse treatment with a calculated heating temperature of 550°C carried out 1 to 20 times with a pulse duration of 10−4 s and intervals between the pulses of 2 min, were investigated. It has been established that electric pulse treatment activates the static recovery and recrystallization of the heavily deformed structure. After one current pulse, a partially recrystallized, and after 5 pulses, a completely recrystallized fine-grain structure with a grain size of 2 – 4 μm was formed, whose subsequent transformation with number of pulses was accompanied by a slight normal grain growth. It was found that the transformation of the deformation structure of nickel was associated with the intense formation of annealing twins, the fraction of which in the grain boundary spectrum reached 45 % after 5 pulses and further scarcely changed. Such structural changes lead to a decrease in the hardness of the material from 225 to 110 HV followed by subsequent stabilization of its level under processing. The nature of the processes controlling the changes in the structure and hardness of nickel depending on the number of cycles of electric pulse treatment is discussed.

References (17)

1. H. Conrad, N. Karam, S. Mannan. Scr. Metall. 17 (3), 411 (1983). Crossref
2. H. Conrad, A. F. Sprecher, W. D. Cao, X. P. Lu. JOM. 42, 28 (1990). Crossref
3. H. Knoepfel. Pulsed High Magnetic Fields. Amsterdam, North-Holland Publishing Company (1970) 392 p.
4. Yu. V. Baranov, O. A. Troitsky, Yu. S. Avramov, A. D. Shlyapin. Physical fundamentals of electropulse and electroplastic treatments and new materials. Moscow, MSIU (2001) 844 p. (in Russian) [Ю. В. Баранов, О. А. Троицкий, Ю. С. Аврамов, А. Д. Шляпин. Физические основы электроимпульсной и электропластической обработок и новые материалы. Москва, МГИУ (2001) 844 с.].
5. W. Jin, J. Fan, H. Zhang, Y. Liu, H. Dong, B. Xu. J. All. Com. 646, 1 (2015). Crossref
6. I. Sh. Valeev, N. P. Barykin, V. G. Trifonov, A. Kh. Valeeva. J. Mater. Eng. Perform. 14, 236 (2005). Crossref
7. T. Konkova, I. Valeev, S. Mironov, A. Korznikov, M. Myshlyaev, S. Lee Semiatin. J. Mater. Res. 29, 2727 (2014). Crossref
8. I. Sh. Valeev. Lett. on Mater. 3 (3), 236 (2013). (in Russian) [И. Ш. Валеев. Письма о материалах. 3 (3), 236 (2013).]. Crossref
9. E. V. Avtokratova, R. R. Ilyasov, I. S. Valeev, O. S. Sitdikov, M. V. Markushev. Lett. on Mater. 1 (4), 194 (2011). (in Russian) [Е. В. Автократова, Р. Р. Ильясов, И. Ш. Валеев, О. Ш. Ситдиков, М. В. Маркушев. Письма о материалах. 1 (4), 194 (2011).]. Crossref
10. I. Sh. Valeev, A. Kh. Valeeva, A. Kh. Akhunova. Basic Probl. of Mat. Sci. 12 (2), 214 (2015). (in Russian) [И. Ш. Валеев, А. Х. Валеева, А. Х. Ахунова. Фунд. пробл. совр. материаловед. 12 (2), 214 (2015).].
11. F. J. Humphreys, M. Hatherly. Recrystallization and related annealing phenomena. 2nd ed. Elsevier (2004) 605 p. Crossref
12. M. Booth, V. Randle, G. Owen. J. Micros. 217, 162 (2005). Crossref
13. X.-M. Chen, Y. C. Lin, Fan Wu. J. All. Com. 724. 198 (2017). Crossref
14. V. Randle, P. R. Rios and Y. Hu. Scr. Mater. 58, 130 (2008). Crossref
15. J. L. Bair, S. L. Hatch, D. P. Field. Scr. Mater. 81, 52 (2014). Crossref
16. Y. Jin, B. Lin, M. Bernacki, G. S. Rohrer, A. D. Rollett, N. Bozzolo. Mat. Sci. Eng. A. 597, 295 (2014). Crossref
17. X. P. Chen, L. F. Li, H. F. Sun, L. X. Wang, Q. Liu. Mat. Sci. Eng. A. 622, 108 (2015). Crossref

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Funding

1. Russian Foundation for Basic Research - 19-08-00953A