铝合金表面腐蚀形态演化规律的分形几何表征  

Characteristics of the Fractal Geometry in the Evolution Rhythm of Surface Corrosion Morphology of Aluminum Alloy

作　　者：许成龙[1,2] 吕胜利[1] 王振果[1,2] 张伟[1,2] 安国锋[1,2] 

机构地区：[1]西北工业大学无人机特种技术国防科技重点实验室,西安710065 [2]西北工业大学航空学院,西安710072

出　　处：《机械科学与技术》2011年第2期233-236,共4页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家科技支撑计划项目(2007BAB27B06)资助

摘　　要：通过计算机图像处理技术对不同腐蚀时间作用下铝合金的腐蚀形貌进行分析,将分形理论引入到铝合金腐蚀损伤研究领域,采用盒维数法计算得到铝合金表面腐蚀形貌的分形维数值,并对这些数值进行了详细的统计分析。研究结果表明:分形维数随腐蚀时间的增加而增大,分形维数的概率分布符合逻辑分布。分形维数可作为定量描述腐蚀形貌复杂程度的特征参数之一。Image-processing technique is used to analyze the corrosion morphology of aluminum alloy pre-corroded in the corrosive environments of different durations.The fractal theory was introduced to the research domain of aluminum alloy corrosion damage.The data sets of values of the fractal dimension of corrosion surface were calculated by adopting the box-counting dimension method.Detailed statistical analysis was carried out.The conclusion can be drawn that the logistic distribution is acceptable for the data sets of values of the fractal dimension which become larger with the prolonging of corrosion time.The fractal dimension can then be used as an important characteristic parameter to describe the complexity degree of corrosion morphology.

关 键 词：腐蚀形貌 分形 盒维数 特征参数 铝合金 

分 类 号：TG171[金属学及工艺—金属表面处理] V252[金属学及工艺—金属学]