Effect of Recovery and Recrystallization on the Hall–Petch Relation Parameters in Submicrocrystalline Metals: I. Experimental Studies
- Authors: Chuvil’deev V.N.1, Nokhrin A.V.1, Myshlyaev M.M.2,3, Kopylov V.I.1,4, Lopatin Y.G.1, Melekhin N.V.1, Piskunov A.V.1, Bobrov A.A.1, Pirozhnikova O.E.1
-
Affiliations:
- Nizhny Novgorod State University
- Baikov Institute of Metallurgy and Materials Science
- Institute of Solid State Physics
- Physicotechnical Institute
- Issue: Vol 2018, No 1 (2018)
- Pages: 71-89
- Section: Article
- URL: https://journals.rcsi.science/0036-0295/article/view/172219
- DOI: https://doi.org/10.1134/S0036029518010044
- ID: 172219
Cite item
Abstract
Yield strength σy, macroelastic limit σ0, and effective grain-boundary hardening coefficient Keff in the Hall–Petch relation (\({\sigma _y} = {\sigma _0} + {K_{eff}}/\sqrt d \)) in the submicrocrystalline (SMC) materials produced by equalchannel angular pressing are experimentally studied. It is shown that, as compared to parameter σ0 and K in the Hall–Petch relation for coarse-grained metals, the SMC metals are characterized by higher values of σ0 and lower values of Keff. The critical grain size (d1) at which Keff in the σy–d–1/2 relations of SMC materials changes falls in the range 0.2–0.5 μm. The dependences of macroelastic limit σ0 and coefficient Keff on the annealing temperature are found to be determined by recrystallization. If abnormal grain growth develops in annealing of SMC metals, anomalous hardening is detected and a nonmonotonic temperature dependence of coefficient Keff takes place. In the case of conventional recrystallization at a high annealing temperature, SMC metals exhibit a smooth decrease in σ0 and an increase in Keff to the values of K characteristic of coarsegrained materials.
About the authors
V. N. Chuvil’deev
Nizhny Novgorod State University
Author for correspondence.
Email: nokhrin@nifti.unn.ru
Russian Federation, pr. Gagarina 23/5, Nizhny Novgorod, 603600
A. V. Nokhrin
Nizhny Novgorod State University
Email: nokhrin@nifti.unn.ru
Russian Federation, pr. Gagarina 23/5, Nizhny Novgorod, 603600
M. M. Myshlyaev
Baikov Institute of Metallurgy and Materials Science; Institute of Solid State Physics
Email: nokhrin@nifti.unn.ru
Russian Federation, Leninskii pr. 49, Moscow, 119991; Chernogolovka, Moscow oblast, 142432
V. I. Kopylov
Nizhny Novgorod State University; Physicotechnical Institute
Email: nokhrin@nifti.unn.ru
Russian Federation, pr. Gagarina 23/5, Nizhny Novgorod, 603600; ul. Tskhodinskaya 4, Minsk, 220141
Yu. G. Lopatin
Nizhny Novgorod State University
Email: nokhrin@nifti.unn.ru
Russian Federation, pr. Gagarina 23/5, Nizhny Novgorod, 603600
N. V. Melekhin
Nizhny Novgorod State University
Email: nokhrin@nifti.unn.ru
Russian Federation, pr. Gagarina 23/5, Nizhny Novgorod, 603600
A. V. Piskunov
Nizhny Novgorod State University
Email: nokhrin@nifti.unn.ru
Russian Federation, pr. Gagarina 23/5, Nizhny Novgorod, 603600
A. A. Bobrov
Nizhny Novgorod State University
Email: nokhrin@nifti.unn.ru
Russian Federation, pr. Gagarina 23/5, Nizhny Novgorod, 603600
O. E. Pirozhnikova
Nizhny Novgorod State University
Email: nokhrin@nifti.unn.ru
Russian Federation, pr. Gagarina 23/5, Nizhny Novgorod, 603600