This paper aims at understanding the texture evolution in extruded oxide dispersion strengthened 18Cr ferritic steel during high-temperature uniaxial compression testing at 1,423 K at a strain rate of 0.01/s based on extensive electron back scatter diffraction characterization. The α-fiber texture is observed along the extrusion direction (ED) in the initial microstructure. The flow curves generated during uniaxial compression test are used to determine the associated hardening parameters. In addition, the degree of texture evolution after deformation along the ED and the transverse direction (TD) with respect to the initial condition has been predicted using VPSC-5 constitutive model. The prediction shows that the deformation along the ED produces a dominant γ-fiber texture in contrast to the TD. This is in agreement with the experimental results where γ-fiber texture is observed, due to enhanced dynamic recrystallization at high-temperature deformation.

中文翻译：

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基于塑性评价的18Cr-ODS铁素体钢高温变形结晶织构演变研究

本文旨在基于广泛的电子背散射衍射表征，在 1,423 K、应变速率为 0.01/s 的高温单轴压缩试验中了解挤压氧化物弥散强化 18Cr 铁素体钢的织构演变。这α-在初始微观结构中沿挤出方向 (ED) 观察到纤维织构。在单轴压缩试验期间产生的流动曲线用于确定相关的硬化参数。此外，已经使用 VPSC-5 本构模型预测了沿 ED 和横向 (TD) 变形后相对于初始条件的纹理演变程度。预测表明，沿 ED 的变形产生了占主导地位的γ- 与 TD 相比的纤维质地。这与实验结果一致，其中γ观察到纤维织构，这是由于高温变形时动态再结晶增强。