The paper explores the effect of high-temperature cross rolling followed by cold rolling on the internal structure of metastable Fe-Cr-Mn austenitic stainless steel, formation of nonequilibrium martensite e and α′ phases in it, dynamic rotations on fracture surfaces, fatigue life under alternating bending, and wear resistance. Scratch testing revealed a strong increase in the damping effect in the formed hierarchical mesoscopic substructure that promotes the formation of a nanocrystalline grain structure, formation of hcp e martensite and bcc α′ martensite in grains, formation of a vortical filamentary substructure on the fracture surface, and an increase in the high-cycle fatigue properties and wear resistance. These processes are associated with a high density of nanoscale mesoscopic structural states that arise in lattice curvature zones during high-temperature cross rolling followed by cold rolling with smooth rolls. The described effects are explained by the self-consistent mechanical behavior of hcp e martensite laths in fcc austenite grains and bcc α′ martensite laths formed in cold rolling of the steel after high-temperature cross rolling.

中文翻译：

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与晶格曲率相关的纳米级细观结构状态对 Fe-Cr-Mn 奥氏体钢机械性能的影响

本文探讨了高温交叉轧后冷轧对亚稳态Fe-Cr-Mn奥氏体不锈钢内部结构、非平衡马氏体e和α'相的形成、断口动态旋转、疲劳寿命的影响。在交替弯曲下，耐磨。划痕测试表明，所形成的分级细观亚结构中的阻尼效应显着增加，促进了纳米晶粒结构的形成，晶粒中 hcp e 马氏体和 bcc α' 马氏体的形成，在断裂面上形成了涡旋丝状亚结构，以及提高高周疲劳性能和耐磨性。这些过程与高密度的纳米级介观结构状态有关，这些状态在高温交叉轧制过程中出现在晶格曲率区，然后用光滑辊冷轧。所描述的效果可以通过 fcc 奥氏体晶粒中的 hcp e 马氏体板条和高温交叉轧制后钢冷轧中形成的 bcc α' 马氏体板条的自洽力学行为来解释。