Open AccessEvaluation of the uniformity of plastic deformation under tension
Author(s) -
D. A. Rastorguev
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/734/1/012071
Subject(s) - materials science , tension (geology) , deformation (meteorology) , residual stress , plasticity , mechanics , composite material , mechanical engineering , ultimate tensile strength , engineering , physics
The article deals with the method of estimating the uniformity of the axial strain distribution under tension of cylindrical samples. Such an assessment is necessary in the design and conduct of thermal power treatment within the procurement stage of the technological process. The technology of processing of low-rigid long-length blanks, which consists in simultaneous heating and deformation, mainly by stretching, is considered. This method provides the formation of straightness of the workpiece with alignment and reduction of residual process stresses. For long-length workpieces, the distribution of deformations in the axial direction across different zones is unstable. It is associated with the initial heterogeneity of the material properties, uneven heating and autowave nature of the plastic flow. A technique is considered that provides a comprehensive assessment of the uniformity of stretching along the length with sufficient simplicity and high objectivity. The results of using the developed integrated assessment for high-temperature tension of samples made of corrosion resistant alloy are presented.