以 Na Cl薄液层模拟 LC4CS铝合金的大气腐蚀环境 ,并在实验室空气中、3 .5 % Na Cl溶液中和 Na Cl薄液层作用下研究 LC4CS铝合金的疲劳性能。结果显示 ,在 ΔK小于 40 0 N/mm3/2时 ,薄液层下铝合金的腐蚀疲劳裂纹扩展速率大于 Na Cl溶...以 Na Cl薄液层模拟 LC4CS铝合金的大气腐蚀环境 ,并在实验室空气中、3 .5 % Na Cl溶液中和 Na Cl薄液层作用下研究 LC4CS铝合金的疲劳性能。结果显示 ,在 ΔK小于 40 0 N/mm3/2时 ,薄液层下铝合金的腐蚀疲劳裂纹扩展速率大于 Na Cl溶液中的数值 ,也大于实验室空气中的数值。在ΔK较小时 ,薄液层下腐蚀疲劳裂纹断口的特征与 Na Cl溶液中的较为接近 。展开更多
The notched and smooth specimens of aluminum alloy LC4CS soaked in EXCO solution for different time are tested under the constant amplitude cyclic loading to obtain S-N curves and fatigue notch factors with different ...The notched and smooth specimens of aluminum alloy LC4CS soaked in EXCO solution for different time are tested under the constant amplitude cyclic loading to obtain S-N curves and fatigue notch factors with different pre-corrosion time. By analyzing the corrosion process of LC4CS specimens in EXCO solution, the influ- ence mechanism of corrosion on fatigue notch factor is expounded. Then, a two-parameter model used to describe the change of corrosion fatigue notch factor with time is established and verified by experiment. The results show that the pre-corrosion fatigue notch factor of LC4CS material decreases at first and then increases with the increasing pre-corrosion time. The inflection point appears at the beginning of denudation stage.展开更多
文摘以 Na Cl薄液层模拟 LC4CS铝合金的大气腐蚀环境 ,并在实验室空气中、3 .5 % Na Cl溶液中和 Na Cl薄液层作用下研究 LC4CS铝合金的疲劳性能。结果显示 ,在 ΔK小于 40 0 N/mm3/2时 ,薄液层下铝合金的腐蚀疲劳裂纹扩展速率大于 Na Cl溶液中的数值 ,也大于实验室空气中的数值。在ΔK较小时 ,薄液层下腐蚀疲劳裂纹断口的特征与 Na Cl溶液中的较为接近 。
基金Supported by the Program for Changjiang Scholars and Innovative Research Team of Ministry of Education(Irt0906)~~
文摘The notched and smooth specimens of aluminum alloy LC4CS soaked in EXCO solution for different time are tested under the constant amplitude cyclic loading to obtain S-N curves and fatigue notch factors with different pre-corrosion time. By analyzing the corrosion process of LC4CS specimens in EXCO solution, the influ- ence mechanism of corrosion on fatigue notch factor is expounded. Then, a two-parameter model used to describe the change of corrosion fatigue notch factor with time is established and verified by experiment. The results show that the pre-corrosion fatigue notch factor of LC4CS material decreases at first and then increases with the increasing pre-corrosion time. The inflection point appears at the beginning of denudation stage.
