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Residual stress analysis with stress-dependent growth rate and creep deformation during oxidation

机译：残余应力分析，应力依赖性生长速率和氧化过程中的蠕变变形

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摘要

In this paper, taking into account the external loading, growth strain, creep, and bending deformation during the metallic high-temperature oxidation, a residual stress evolution model is developed according to the force- and moment-equilibrium equations. In this model, oxidation kinetic relationship (the stress-dependent growth rate) is related to the stress in the oxide scale, not classical parabolic law. If and only if the stress in the scale or the activation volume is equal to zero, this relationship can reduce to the parabolic law. Then the stress-dependent oxidation kinetics is compared with the stress-independent one (the parabolic law). Finally, effects of the external loading on the stress distribution in the oxide scale, the curvature of the system and the scale thickness are discussed, and numerical results show that the tensile external loading decreases the oxidation stress and promotes the growth rate of the oxidation layer.
机译：在本文中，考虑到金属高温氧化过程中的外部载荷，生长应变，蠕变和弯曲变形，根据力和力矩平衡方程建立了残余应力演化模型。在该模型中，氧化动力学关系（与应力有关的生长速率）与氧化物级的应力有关，而不与经典的抛物线定律有关。当且仅当标度或激活体积中的应力等于零时，这种关系才能简化为抛物线定律。然后将应力相关的氧化动力学与应力无关的氧化动力学进行比较（抛物线定律）。最后，讨论了外部载荷对氧化皮应力分布，体系曲率和氧化皮厚度的影响，数值结果表明，拉伸外部载荷降低了氧化应力，促进了氧化层的生长速率。 。

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  • 来源
    《Journal of Materials Research》 |2016年第16期|2384-2391|共8页
  • 作者

    Yaohong Suo; Zhonghua Zhang; Xiaoxiang Yang;

  • 作者单位

    School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou 350108, China, and School of Science, Xi'an University of Science and Technology, Xi'an 710054, China;

    School of Science, Xi'an University of Science and Technology, Xi'an 710054, China;

    School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou 350108, China;

  • 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);
  • 原文格式 PDF
  • 正文语种 eng
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