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Status : Active
Standard Type : Main
Document No : ISO 10275:2020
Document Year : 2020
Pages : 10
Edition : 3
Section Volume : Ductility testing (ISO/TC 164/SC 2.)
The method is valid only for that part of the stress-strain curve in the plastic range where the curve is continuous and monotonic (see 8.4).
In the case of materials with a serrated stress-strain curve in the work hardening range (materials which show the Portevin-Le Chatelier effect, e.g. AlMg-alloys), the automatic determination (linear regression of the logarithm true stress vs. the logarithm true plastic strain, see 8.7) is used to give reproducible results.