The paper proposes a technique for reconstructing the true hardening curve of isotropic materials from ring tensile tests. Neutron irradiated 42XNM alloy tensile properties were investigated. The calculation of the true hardening curve for tensile and compression tests of standard cylindrical samples was performed at the first step. After that, the FEM-model was developed and validated using the ring tension and compression tests (with the hardening curve defined in step 1). Finally, the true hardening curve was calculated by selecting the FEM-model parameters and its validation by ring sample tests in different states using an iterative method. For these samples, experimental and calculated gauge length values were obtained, and the corresponding material’s constants were estimated.

本文提出了一种通过环拉伸试验重建各向同性材料真实硬化曲线的技术。研究了中子辐照的 42XNM 合金的拉伸性能。标准圆柱试样拉伸和压缩试验的真实硬化曲线的计算在第一步进行。之后，使用环拉伸和压缩测试（使用步骤 1 中定义的硬化曲线）开发和验证 FEM 模型。最后，通过选择有限元模型参数并通过使用迭代方法在不同状态下的环形样本测试对其进行验证，计算出真实硬化曲线。对于这些样品，获得了实验和计算标距值，并估计了相应材料的常数。