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首页> 外文期刊>International Journal of Fatigue >Fatigue behavior of ferritic-pearlitic-bainitic steel in loading with positive mean stress
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Fatigue behavior of ferritic-pearlitic-bainitic steel in loading with positive mean stress

机译：铁素体-贝氏体-贝氏体钢在平均正应力作用下的疲劳行为

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摘要

The effect of positive mean stress on the fatigue behavior of ferritic-pearlitic-bainitic steel has been studied. Specimens, produced from a massive forging, were cycled with two constant stress amplitudes and various positive mean stresses. Plastic strain amplitude and cyclic creep rate were measured during cyclic loading and the effect of the mean stress on saturated plastic strain amplitude and mean strain at half-life was established. Plastic strain amplitude is weakly dependent but creep strain increases with the mean stress exponentially. Fatigue life decreases with the mean stress for both stress amplitudes. The contributions of cyclic plastic strain and cyclic creep to the fatigue damage were evaluated and discussed in relation with the Manson-Coffin curve.
机译：研究了正平均应力对铁素体-贝氏体-贝氏体钢疲劳性能的影响。由大量锻件制成的试样以两个恒定的应力幅度和各种正平均应力循环。在循环加载过程中测量了塑性应变幅度和循环蠕变速率，并建立了平均应力对饱和塑性应变幅度和半衰期平均应变的影响。塑性应变幅度是弱相关的，但是蠕变应变随平均应力呈指数增加。疲劳寿命随着两个应力幅度的平均应力而减小。评估了循环塑性应变和循环蠕变对疲劳损伤的贡献，并与曼森-科芬曲线进行了讨论。

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  • 来源
    《International Journal of Fatigue》 |2012年第2012期|p.103-108|共6页
  • 作者

    Jaroslav Polak; Jiri Man; Martin Petrenec; Jiri Tobias;

  • 作者单位

    Institute of Physics of Materials, Academy of Sciences of the Czech Republic, Zizkova 22, 616 62 Brno, Czech Republic;

    Institute of Physics of Materials, Academy of Sciences of the Czech Republic, Zizkova 22, 616 62 Brno, Czech Republic;

    Institute of Physics of Materials, Academy of Sciences of the Czech Republic, Zizkova 22, 616 62 Brno, Czech Republic;

    Institute of Physics of Materials, Academy of Sciences of the Czech Republic, Zizkova 22, 616 62 Brno, Czech Republic;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    fatigue life; mean stress; plastic strain; cyclic creep; fatigue damage;

    机译：疲劳寿命;平均应力;塑性应变;循环蠕变;疲劳损伤;

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