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Experimental Study of Strain Hardening in Cast Austenitic 60X24AG16 Steel
Deryugin E. E.
1, Vlasov I.V.
1, Gomorova Y.F.1
1Institute of Strength Physics and Materials Science of Siberian Branch of Russian Academy of Sciences, Tomsk, Russia
Email: dee@ispms.ru, viv@ispms.ru, gomjf@ispms.ru
An improved method for the numerical determination of the deformation characteristics of low-ductility materials is presented. A specialized algorithm has been developed that, using the capabilities of the standard OriginPro software, enables accurate averaging of the experimental deformation diagram and represents it in an analytical form. The nonlinear part of the experimental stress-strain relationship is expressed as a 9th-degree polynomial. This analytical representation of the deformation diagram allowed for a precise determination dependency of the strain hardening coefficient and the strain hardening rate of the material from deformation. Using this new method, the patterns of strain hardening in the cast 60X24AG16 alloy were analyzed. Special attention is given to the influence of preliminary deformation on the strain hardening characteristics. Keywords: uniaxial tension, three-point bending, strain hardening, preloading, deformation stages, boundary conditions, numerical analysis of tensile curves.
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