Issues »  Volume 12, Issue 3

Stress Raisers and Their Role in Formation of Mechanical Properties of Polycrystals with the Nanosize Components of Structure

P. Yu. Volosevych

G.V. Kurdyumov Institute for Metal Physics, NAS of Ukraine, 36 Academician Vernadsky Blvd., UA-03142 Kyiv, Ukraine

Received: 22.10.2010. Download: PDF

Applicability of the d’Alembert principle for the description of plastic deformation in terms of the modern conceptions of physics of metals is considered. It is offered to consider the stress concentrators as points of interaction between the parts of a sample or elements of its structure. The dependence of their actual quantity on the strain rate is determined, and features of change of stress-growth rate at concentrator peaks are described as function of their number and strength. Within the scope of the d’Alembert principle, the process of plastic deformation is represented as two progressive phenomena, namely, the growth of stresses in tops of concentrators at a microlevel during a choice of the weakest section of a sample and the stress relaxation in tops of actual concentrators because of the loss of mechanical stability at a macrolevel. The determining roles of a quantity of concentrators and their strength in formation of mechanical properties are specified.

Keywords: concentrator of stresses, micromechanisms of relaxation and growth of stresses, stress growth rate.

PACS: 46.50.+a, 62.20.F-, 62.20.M-, 62.23.-c, 62.25.Mn, 62.40.+i, 83.50.-v

DOI: https://doi.org/10.15407/ufm.12.03.367

Citation: P. Yu. Volosevych, Stress Raisers and Their Role in Formation of Mechanical Properties of Polycrystals with the Nanosize Components of Structure, Usp. Fiz. Met., 12, No. 3: 367—382 (2011) (in Russian), doi: 10.15407/ufm.12.03.367

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Cited By (2)
  1. G. I. Prokopenko, B. M. Mordyuk, P. Yu. Volosevych, S. P. Vorona et al., Metallofiz. Noveishie Tekhnol. 39, 189 (2017).
  2. P. Yu. Volosevich and A. V. Shiyan, Steel Transl. 45, 460 (2015).

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