金属腐蚀形貌的分形表征
Fractal Characterization of Corrosion Morphology of Metallic Material
摘 要
利用扫描电子显微镜(SEM)得到铝合金表面腐蚀损伤微观形貌, 借助于数字图像处理技术对其进行二值化处理, 并利用小岛法研究二值图像的分形维数, 得到分形维数随腐蚀损伤的变化趋势。结果表明: 二值化过程中灰度阈值与分形维数间的函数关系与弹塑性材料的拉伸曲线具有类比性。提出了从分形角度上表征腐蚀损伤特征, 所得的结果具有一定的工程价值。
腐蚀形貌
表征
fractal dimension
corrosion morphology
characterization
Abstract
The corrosion morphology of aluminum alloy was obtained by SEM. With the aid of digital image technique, original SEM images were transferred to binary image, which was prepared to be executed with fractal analysis. Relationship between fractal dimensions of binary images versus corresponding corrosion damage was identified. Results indicated a complicated relationship of grey threshold value and corresponding calculated fractal dimension, which was similar to the elastoplastic tensile curve. Corrosion damage could be characterized from viewpoint of fractal geometry, which would be promising for engineering application.
中图分类号 TG174
所属栏目 试验与研究
基金项目 国家自然科学基金资助项目(11272173)
收稿日期 2013/5/29
修改稿日期
网络出版日期
作者单位点击查看
备注李旭东(1984-), 男, 讲师, 硕士。
引用该论文: LI Xu-dong,MU Zhi-tao,KONG Guang-ming. Fractal Characterization of Corrosion Morphology of Metallic Material[J]. Physical Testing and Chemical Analysis part A:Physical Testing, 2014, 50(9): 639～642
李旭东,穆志韬,孔光明. 金属腐蚀形貌的分形表征[J]. 理化检验－物理分册, 2014, 50(9): 639～642
被引情况:
【1】朱江, "激光共聚焦扫描显微镜原位观察奥氏体不锈钢的敏化过程",理化检验－物理分册 52, 83-87(2016)
【2】邹章雄,金少申,刘昌禄,刘顺勤,马强,葛玉雄, "奥氏体不锈钢压力管道的应力腐蚀开裂及预防",理化检验－物理分册 51, 721-724(2015)
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参考文献
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【2】MANDELBROT B B, PASSOJA D E, PAULLAY A J. Fractal character of fracture surfaces of metals[J].Nature,1984,308(18):721-722.
【3】张济忠.分形[M].北京:清华大学出版社,1995.
【4】BORODICH F M. Some fractal models of fracture[J].J Mech Phys Solids,1997,45(2):239-259.
【5】张有宏,吕国志,任克亮,等.不同环境下LY12-CZ铝合金表面腐蚀损伤演化规律研究[J].航空学报,2007,28(1):142-145.
【6】李旭东, 刘治国, 穆志韬.铝锂合金预腐蚀疲劳退化研究[J].新技术新工艺,2013,3:90-92.
【7】李旭东,穆志韬,刘治国,等.基于分形理论的6A02铝合金腐蚀损伤评估[J].装备环境工程,2012(4):27-31.
【8】李旭东,刘治国,穆志韬.基于短裂纹的LD10CZ铝合金腐蚀疲劳裂纹扩展研究[J].海军航空工程学院学报,2013,28(1):47-52.
【9】谢和平.脆性材料中的分形损伤[J].机械强度,1990,17(2):75-82.
【10】杨志远.铝质电瓷断口分形研究与分维测量[J].绝缘材料,2002(5):18-20.
【11】LI Xu-dong, WANG Xi-shu, REN Huai-hui, et al. Effect of prior corrosion state on the fatigue small cracking behavior of 6151-T6 aluminum alloy[J].Corrosion Science,2012,55:26-33.
【12】WANG X S, DENG Y H, LI Y Q. An experimental investigation of failure behaviors of conducting polythiophene coating films[J].Journal of Material Science,2002,37:4865-4870.
【2】MANDELBROT B B, PASSOJA D E, PAULLAY A J. Fractal character of fracture surfaces of metals[J].Nature,1984,308(18):721-722.
【3】张济忠.分形[M].北京:清华大学出版社,1995.
【4】BORODICH F M. Some fractal models of fracture[J].J Mech Phys Solids,1997,45(2):239-259.
【5】张有宏,吕国志,任克亮,等.不同环境下LY12-CZ铝合金表面腐蚀损伤演化规律研究[J].航空学报,2007,28(1):142-145.
【6】李旭东, 刘治国, 穆志韬.铝锂合金预腐蚀疲劳退化研究[J].新技术新工艺,2013,3:90-92.
【7】李旭东,穆志韬,刘治国,等.基于分形理论的6A02铝合金腐蚀损伤评估[J].装备环境工程,2012(4):27-31.
【8】李旭东,刘治国,穆志韬.基于短裂纹的LD10CZ铝合金腐蚀疲劳裂纹扩展研究[J].海军航空工程学院学报,2013,28(1):47-52.
【9】谢和平.脆性材料中的分形损伤[J].机械强度,1990,17(2):75-82.
【10】杨志远.铝质电瓷断口分形研究与分维测量[J].绝缘材料,2002(5):18-20.
【11】LI Xu-dong, WANG Xi-shu, REN Huai-hui, et al. Effect of prior corrosion state on the fatigue small cracking behavior of 6151-T6 aluminum alloy[J].Corrosion Science,2012,55:26-33.
【12】WANG X S, DENG Y H, LI Y Q. An experimental investigation of failure behaviors of conducting polythiophene coating films[J].Journal of Material Science,2002,37:4865-4870.
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