NUMERICAL SIMULATION ON STRESS CORROSION CRACK GROWTH RATE OF 316L STAINLESS STEEL IN DISSOLVED OXYGEN ENVIRONMENT BASED ON A COUPLED DIFFUSION-COHESION MODEL

BA SiBo; LING Ling; ZHANG JunJie; WANG XueLin

doi:10.16579/j.issn.1001.9669.2024.06.021

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NUMERICAL SIMULATION ON STRESS CORROSION CRACK GROWTH RATE OF 316L STAINLESS STEEL IN DISSOLVED OXYGEN ENVIRONMENT BASED ON A COUPLED DIFFUSION-COHESION MODEL

Fatigue · Damage · Fracture · Failure Analysis | 更新时间：2025-04-28

- NUMERICAL SIMULATION ON STRESS CORROSION CRACK GROWTH RATE OF 316L STAINLESS STEEL IN DISSOLVED OXYGEN ENVIRONMENT BASED ON A COUPLED DIFFUSION-COHESION MODEL
- Journal of Mechanical Strength Vol. 46, Issue 6, Pages: 1441-1448(2024)
- 作者机构：
  
  1. 华中科技大学机械科学与工程学院
- 作者简介：
- 基金信息：
- DOI：10.16579/j.issn.1001.9669.2024.06.021
  CLC： TG174
- Published：15 December 2024
- 稿件说明：
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BA SiBo, LING Ling, ZHANG JunJie, et al. NUMERICAL SIMULATION ON STRESS CORROSION CRACK GROWTH RATE OF 316L STAINLESS STEEL IN DISSOLVED OXYGEN ENVIRONMENT BASED ON A COUPLED DIFFUSION-COHESION MODEL[J]. Journal of mechanical strength , 2024, 46(6): 1441-1448.
DOI：

BA SiBo, LING Ling, ZHANG JunJie, et al. NUMERICAL SIMULATION ON STRESS CORROSION CRACK GROWTH RATE OF 316L STAINLESS STEEL IN DISSOLVED OXYGEN ENVIRONMENT BASED ON A COUPLED DIFFUSION-COHESION MODEL[J]. Journal of mechanical strength , 2024, 46(6): 1441-1448. DOI： 10.16579/j.issn.1001.9669.2024.06.021.

摘要

高温水环境下溶解氧是影响奥氏体不锈钢应力腐蚀开裂的主要环境参数之一。基于应力腐蚀的滑移-溶解理论

建立了一种氧扩散与内聚力耦合的应力腐蚀裂纹模拟模型。采用内聚力有限元数值方法模拟了在325℃高温水溶解氧环境下316L奥氏体不锈钢的应力腐蚀开裂行为

分析了溶解氧含量与加工硬化对裂纹扩展速率(Crack Growth Rate

CGR)的影响。结果表明

通过标定的模型参数

建立的模型可以预测不同溶解氧含量下材料应力腐蚀裂纹扩展速率

计算结果与文献中的实验测量结果一致。在模拟的高温水环境和应力强度因子条件下

316L不锈钢应力腐蚀裂纹扩展速率与屈服强度关系可表示为CGR∝σy2.028。

Abstract

Dissolved oxygen is one of the main environmental parameter affecting of stress corrosion cracking of austenitic stainless steel in high temperature water environment.Based on the slip-dissolution of stress corrosion theory

a coupled diffusion and cohesion model was built for simulating stress corrosion crack.The stress corrosion cracking behavior of 316L austenitic stainless steel in high temperature water of 325℃ with dissolved oxygen was simulated by finite element analysis using cohesive element.The effects of dissolved oxygen content and cold working on crack growth rate(CGR)were analyzed.The results indicate that

by appropriately calibrating the model parameters

the built model can predict the CGR of stress corrosion cracking under different dissolved oxygen contents

showing that the calculated CGR agrees well with the experimental results reported in the literature.Furthermore

the relationship between the stress corrosion crack growth rate and the yield strength of 316L stainless steel can be fitted as CGR∝σy2.028 in the simulated high temperature water and stress intensity factor conditions.

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