Abstract

1. The improtant role of correct selection of measurement base in studying distribution rules has been demonstrated. The most complete micropicture for strains is revealed on a specimen base equal to part of the grain size. 2. Plastic microstrain distribution for a number of metals with a certain value of the measurement base may be described by a normal distribution rule. Departure from the latter arises in cases of an increase in strain localization along grain boundaries, through boundary regions, through grains of a soft phase, etc. 3. Almost all of the possible cases for plastic microstrain distribution may be described by rules for normal and logarithmically normal distribution, and also a distribution of the exponential type (7). Selection for approximation of one distribution rule or another depends on the measurement base and the type of strain microinhomogeneity; intragranular, intergranular, and zonal.

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