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以LY12CZ航空铝合金材料试件为研究对象,以中值寿命N50及特征寿命β为度量参数,通过对自然环境条件下的腐蚀试验和试验室内加速腐蚀试验数据拟合分析,以增长曲线的形式拟合得到中值寿命N50及特征寿命β随加速腐蚀时间t及自然腐蚀时间T的变化规律,得到基于中值寿命和特征寿命相当的当量折算关系。通过与相关文献的对比,证明该折算关系是可行的和合理的。
Taking LY12CZ aerospace aluminum alloy specimen as the research object, taking the median life expectancy (N50) and characteristic life (β) as the measurement parameters, through the fitting analysis of the corrosion test in natural environment and the laboratory accelerated corrosion test data, Fitting the variation law of the median life N50 and the characteristic life β with the accelerated corrosion time t and the natural corrosion time T, the equivalence equivalent conversion based on median life and characteristic life is obtained. Through the comparison with the relevant literature, it is proved that the conversion relationship is feasible and reasonable.