A method for obtaining circumferential strain gradient of alloy compression deformation experiment

CN123028905APending Publication Date: 2026-11-03CHINA NAT ERZHONG GRP DEYANG WANHANG DIE FORGING CO LTD
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Patent Information

Application Number
CN202611507783.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-09-28
Publication Date
2026-11-03

AI Technical Summary

Technical Problem

In existing double-cone deformation experiments, the radial metallurgical differences of alloy materials are coupled with the strain gradient, resulting in insufficient accuracy of experimental results. There is a lack of systematic experimental design methods to eliminate the interference of radial metallurgical defects and improve the efficiency of experimental design.

Method used

Design a wedge-shaped mold or specimen end face to continuously vary the axial compression at different circumferential angles. Use finite element simulation software to obtain the actual cumulative strain value, quantitatively compare the nominal strain with the actual cumulative strain, and select the optimal experimental scheme.

Benefits of technology

This method enables the acquisition of experimental data under multiple strain conditions at the same radius location, decoupling strain variables from radial metallurgical differences, improving the accuracy of experimental data and design efficiency, and reducing interference from defects such as radial segregation and inclusions.

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Abstract

The application discloses an alloy compression deformation experiment method for obtaining a circumferential strain gradient, and relates to the technical field of alloy material deformation experiments.The working surface of a compression experiment mold or the end surface of a cylindrical sample is processed into a wedge-shaped structure which is mirror-symmetric about the plane where the central axis of the cylindrical sample is located, so that the cylindrical sample has different compression deformation spaces at different circumferential positions during axial compression, and thus the strain gradient distributed along the circumference is obtained on a single sample; by comparing the deviation of nominal strain calculation and finite element simulation, the strain control accuracy of different schemes can be quantitatively evaluated, and then the finally adopted experiment scheme is determined.The application effectively reduces the interference of defect factors such as radial segregation and inclusions on the experiment results, guarantees that the experiment results are affected by a single variable of strain, and significantly improves the accuracy of experiment data.
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