To study the kinetics of ordering based on changes in mechanical properties, is it more accurate to use yield stress data (point B, determined by the conventional 0.2% offset method) or flow stress at point A (transition of the curve from linear elastic to nonlinear plastic behavior)? It should be noted that in the range where ordering occurs, other transformations, such as recrystallization, are also taking place, and recrystallization affects the yield stress. Could you please recommend references on this topic?
A and B are the points in the stress-strain curve. Both shall be studied to understand the ordering and then to conclude.References are there in the scholarly articles.
In the general approach, point A looks more like it corresponds to the physical nature of the process. Point B is chosen more or less arbitrarily to be sure that the
elastic loading region has ended. So I advise you to study both points, and then compare the results and thereby gain new knowledge that will be useful for other people.
A good book on this topic: Bell J. F., Encyclopedia of Physics, Vol. VIa/1 Mechanics of Solids, Volume I: The Experimental Foundations of Solid Mechanics, Springer-Verlag, Berlin 1973, or, ISBN 978-3-540-13160-1, 1984
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