Regular features of Luders strain due to appearance and propagation of one Chernov–Luders band (CLB) in superfine-grained steel 08G2B are investigated. Active, relaxation and peripheral zones are distinguished in the source of strain uniting the CLB nucleus; go-ahead-activated flow channels are defined. The functions of the zones are considered. Growth in the dislocation density and in the energy spent in the zones upon motion of the CLB front is evaluated. Mechanisms of appearance of new slip bands in the CLB and of unlocking of dislocations are analyzed.
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The work has been performed at the UrFU with financial support of the Government of the Russian Federation (Act No. 211, Contract No. 02.A03.21.0006) and at the IMASh UrO RAN within the topic of State Provision No. 0391-2016-0004.
The tests have been conducted using the equipment of the Collective Use Center of the Ural Federal University and the “Plastometry” Collective Use Center of the IMASh UrO RAN.
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Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 7, pp. 9 – 14, July, 2019
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Farber, V.M., Polukhina, O.N., Vichuzhanin, D.I. et al. A Study of Plastic Strain Before and on the Yield Plateau of Steel 08G2B by Correlation of Digital Images. Part II. Functioning of Flow Channels and Zones in them. Met Sci Heat Treat 61, 405–410 (2019). https://doi.org/10.1007/s11041-019-00437-8
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DOI: https://doi.org/10.1007/s11041-019-00437-8