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首页> 外文期刊>Journal of Materials Research >Cyclic deformation behavior of austenitic stainless steels in the very high cycle fatigue regime-Experimental results and mechanism-based simulations
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Cyclic deformation behavior of austenitic stainless steels in the very high cycle fatigue regime-Experimental results and mechanism-based simulations

机译：奥氏体不锈钢在极高循环疲劳状态下的循环变形行为-实验结果和基于机理的模拟

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摘要

Two austenitic stainless steels of strongly different stacking fault energies (SFEs) and correspondingly different stabilities of the austenite phase were studied with respect to their very high cycle fatigue (VHCF) behavior. The metastable austenitic stainless steel 304L shows a very pronounced transient behavior and a fatigue limit in the VHCF regime. The higher SFE of the 316L steel results in a less pronounced transient cyclic deformation behavior. The plastic shear is more localized, and the formation of deep intrusions leads to microcrack initiation. However, the propagation of such microcracks is impeded by a'-martensite formed very localized within the shear bands. A comprehensive description of the microstructural changes governing the cyclic deformation including the transient resonant behavior was developed and transferred into a mechanism-based model. Simulation results were correlated with the observed deformation evolution and the change of the resonant behavior of specimens during VHCF loading providing a profound understanding of the VHCF-specific deformation behavior.
机译：研究了两种具有高度不同的堆垛层错能（SFE）和相应的奥氏体稳定性的奥氏体不锈钢的极高循环疲劳（VHCF）行为。亚稳态奥氏体不锈钢304L在VHCF模式下表现出非常明显的瞬态行为和疲劳极限。 316L钢的较高SFE会导致不太明显的瞬态循环变形行为。塑性剪切作用更局限，深部侵入体的形成导致微裂纹的产生。但是，这种微裂纹的传播受到剪切带内非常局部形成的马氏体的阻碍。开发了对包括周期性共振行为在内的周期性变形的微观结构变化的全面描述，并将其转移到基于机理的模型中。模拟结果与观察到的变形演化和在VHCF加载过程中样品共振行为的变化相关，从而提供了对VHCF特定变形行为的深刻理解。

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  • 来源
    《Journal of Materials Research》 |2017年第23期|4387-4397|共11页
  • 作者

    Philipp-M. Hilgendorff; Andrei C. Grigorescu; Martina Zimmermann; Claus-Peter Fritzen; Hans-Juergen Christ;

  • 作者单位

    Institut fuer Mechanik und Regelungstechnik-Mechatronik, Universitaet Siegen, Siegen 57068, Germany;

    Institut fuer Werkstofftechnik, Universitdt Siegen, Siegen 57068, Germany;

    Institut fuer Werkstoffwissenschaft, Technische Universitaet Dresden, Dresden 01069, Germany;

    Institut fuer Mechanik und Regelungstechnik-Mechatronik, Universitaet Siegen, Siegen 57068, Germany;

    Institut fuer Werkstofftechnik, Universitaet Siegen, Siegen 57068, Germany;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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