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Mechanistic modeling of corrosion fatigue crack growth of steels in aqueous solutions.

机译：水溶液中钢的腐蚀疲劳裂纹扩展的力学模型。

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摘要

The primary objective was to develop a model for the effects of the range of stress intensity factor (;An experimental study was performed to determine the crack growth (CG) response of a HY-130 steel in de-aerated 3.5% NaCl solution, as a function of ;The crack growth rate (CGR) exhibited an exponential-like dependence on 1/f, with saturation occurring as the frequency decreased. Increases in ;A modeling framework was developed to link the chemical and mechanical processes occurring at the crack-tip. ECGR was assumed to result from hydrogen embrittlement was controlled by the rate of the electrochemical surface reactions.;A model for the CG response, as a function of f and T, was developed based on the kinetic response of the transient surface reactions. The CG response is related to the charge transferred during the transient reactions, which explains the frequency and temperature dependence in terms of reaction kinetics and time.;A model for the CGR magnitude, as a function of K
机译：主要目标是建立应力强度因子范围影响的模型（;进行了一项实验研究以确定HY-130钢在脱气的3.5％NaCl溶液中的裂纹扩展（CG）响应，的函数；裂纹扩展速率（CGR）对1 / f呈指数状依赖，随着频率的降低饱和度增加；在的基础上，建立了一个建模框架来链接发生在裂纹处的化学和机械过程。提示：ECGR假定是由氢脆引起的，它是由电化学表面反应的速率控制的；基于瞬态表面反应的动力学响应，建立了CG反应作为f和T的函数的模型。 CG反应与瞬态反应过程中转移的电荷有关，这从反应动力学和时间的角度解释了频率和温度的依赖性.CGR量的模型，作为K的函数

著录项

  • 作者

    Thomas, James Paul.;

  • 作者单位

    Lehigh University.;

  • 授予单位 Lehigh University.;
  • 学科 Mechanics.;Materials science.;Mechanical engineering.
  • 学位 Ph.D.
  • 年度 1989
  • 页码 240 p.
  • 总页数 240
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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