Generation and Propagation Mechanisms of Cracks in Galvannealed Coating
摘 要
用配备拉伸/三点弯曲试验装置的SEM原位观察分析了热镀锌合金化钢板变形时镀层中裂纹产生、扩展、镀层断裂及在塑性变形过程中镀层与钢基体界面的交互作用。结果表明, 在拉应力作用下, 镀层的破坏可以分为两个过程: 第一阶段主要表现为粉化; 第二阶段主要表现为剥落。镀层在复合应力作用下的断裂并非沿着某一固定的界面发生, 而是在载荷作用的不同阶段, 发生不同类型的断裂和脱落, 在不同区域镀层断裂的界面不同。当镀层承受拉应力时, 裂纹在Г/δ相界面产生, 在δ相中沿着垂直于镀层平面的方向扩展, 并沿着Г相/钢基体界面延伸, 镀层塑性变形的迹象不明显; 但在压应力作用下, 镀层表现出了明显塑性变形的迹象, 在镀层和基体的变形过程中存在裂纹之间的相互作用和不均匀变形的情况。
Abstract
The generation and expansion of cracks in galvannealed coating were analyzed under the condition of compressive or tensile stress, and the interaction between the coating and the steel substrate was analyzed during galvannealed deformation by environmental scanning electron microscope (ESEM) with in-situ investigation method in tension test and three point bending test. The results showed that the damaging process of the galvannealed coating under tensile stress could be divided into two stages. In the first stage the major damage form was powdering, in the second stage, the major damage form was flaking. Under the composite tensile stress, the fracture of galvannealed coating was not along with the fixed interface but arised with different types of fractures and flakes at different stages of the loading; and the interface fracture was different in different regions. When the galvannealed coating was subjected to tensile stress, cracks occurred at the Г/δ interface and extended perpendicularly to coating plane in the δ phase, and then propagated along with the Г/Fe interface. The signs of plastic deformation of coating was not obvious under tensile stress, but showed apparent plastic deformation under compressive stress. During the deformation of coating and steel substrate, there was substantial interaction and inhomogeneity.
中图分类号 TG174.44
所属栏目 试验研究
基金项目 国家自然科学基金资助项目(51071052); 国家“十一五”科技支撑项目(2006BAE03A13); 北京市科技计划项目(D07010300700702)
收稿日期 2010/10/27
修改稿日期 2010/11/19
网络出版日期
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备注袁训华, 博士研究生,
引用该论文: YUAN Xun-hua,JIANG She-ming,LIU Xin,ZHANG Qi-fu. Generation and Propagation Mechanisms of Cracks in Galvannealed Coating[J]. Corrosion & Protection, 2011, 32(8): 595
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参考文献
【1】Iwamoto S, Ochiai S, Okuda H. Analysis of group-buckling and debonding behaviors of galvannealed coating layer on steel substrates under applied tensile strain[J]. ISIJ International, 2009, 49(1):139-145.
【2】Iwamoto S. Analysis of multiple cracking and interfacial debonding of the galvannealed coating layer under applied tensile strain[D]. Department of Materials Science and Engineering Kyoto University, 2009.
【3】Ochiai S, Iwamoto S, Nakamura T. Crack spacing distribution in coating layer of galvannealed steel under applied tensile strain[J]. ISIJ International, 2007, 47(3):458-465.
【4】Nunomura Y, Takasugi T. Plastic deformation and fracture behavior of galvannealed coating[J]. ISIJ International, 2003, 43(3):454-460.
【5】Iwamoto S, Ochiai S, Okuda H, et al. Finite element analysis of interfacial debonding of the Fe-Zn intermetallic coating layer on steel substrate[C]//The 7th international conference on zinc and zinc alloy coated steel sheet, Osaka, Japan, 2007:236-240.
【6】Takasugi T, Machida J. Plastic deformation and fracture behavior of galvannealed coating under compressive stress circumstance[C]//The 7th international conference on zinc and zinc alloy coated steel sheet, Osaka, Japan, 2007:230-235.
【7】Luis G Garza, Chester J Van Tyne. The effect of ζ-phase on the frictional behavior of galvannealed interstitial free sheet steels[C]//The 7th international conference on zinc and zinc alloy coated steel sheet, Osaka, Japan, 2007:248-253.
【8】Nunomura Y, Takasugi T. Plastic deformation and fracture behavior of galvannealed coating[J]. ISIJ International, 2003, 43(3):454-460.
【9】Moon-Hi Hong. Correlation between the microstructure of galvannealed coatings and the defoliation during press forming[J]. ISIJ International, 2005, 45(6):896-902.
【10】Michal G M, Janavicius P V, Paik Doo-Jin, et al. Direct observations of galvanneal coating delamination[C]//The 6th International Conference on Zinc and Zinc Alloy Coated Sheet Steels, Chicago, III.USA, 2004:517-525.
【11】Lee H, Jun C H, Song J, et al. The estimation of phase fractions in galvannealed steel sheet using independent component analysis[J]. Chemometrics and Intelligent Laboratory Systems, 2007, 87:81-87.
【12】Zhong W, Ng H F, Ichikawa M. Effect of coating characteristics on powdering performance of galvanneal coatings[C]//Proceedings of the 4th international conference on zinc and zinc alloy coated steel sheet, ISIJ, Tokyo, Japan, 1998:603-607.
【13】Lee K K, Lee I H, Lee C R, et al. In-situ observation in a scanning electron microscope on the exfoliation behavior of galvannealed Zn-Fe coating layers[J]. Surface and Coating Technology, 2007, 201:6261-6266.
【14】Garza L G, Van Tyne C J. Fraction and formability of galvannealed interstitial free sheet steel[J]. Journal of Materials Processing Technology, 2007, 187(12):164-168.
【15】Marder A R. The metallurgy of zinc-coated steel[J]. Progress in Materials Science, 2000, 45(3):191-271.
【16】Hertveldt I, De Cooman B C, Meseure K, et al. The shear strength of galvannealed coatings on IF steels[J]. ISIJ International, 1999, 39(12):1280-1288.
【17】Alpas A T, Inagaki J. Effect of microstructure on fracture mechanisms in galvannealed coatings[J]. ISIJ International, 2000, 40(2):172-181.
【18】张启富, 刘邦津, 黄建中. 现代钢带连续热镀锌[M]. 北京: 冶金工业出版社, 2007.
【19】Ochiai S, Iwamoto S, Nakamura T, et al. Crack spacing distribution in coating layer of galvannealed steel under applied tensile strain[J]. ISIJ International, 2007, 47(3):45458-465.
【2】Iwamoto S. Analysis of multiple cracking and interfacial debonding of the galvannealed coating layer under applied tensile strain[D]. Department of Materials Science and Engineering Kyoto University, 2009.
【3】Ochiai S, Iwamoto S, Nakamura T. Crack spacing distribution in coating layer of galvannealed steel under applied tensile strain[J]. ISIJ International, 2007, 47(3):458-465.
【4】Nunomura Y, Takasugi T. Plastic deformation and fracture behavior of galvannealed coating[J]. ISIJ International, 2003, 43(3):454-460.
【5】Iwamoto S, Ochiai S, Okuda H, et al. Finite element analysis of interfacial debonding of the Fe-Zn intermetallic coating layer on steel substrate[C]//The 7th international conference on zinc and zinc alloy coated steel sheet, Osaka, Japan, 2007:236-240.
【6】Takasugi T, Machida J. Plastic deformation and fracture behavior of galvannealed coating under compressive stress circumstance[C]//The 7th international conference on zinc and zinc alloy coated steel sheet, Osaka, Japan, 2007:230-235.
【7】Luis G Garza, Chester J Van Tyne. The effect of ζ-phase on the frictional behavior of galvannealed interstitial free sheet steels[C]//The 7th international conference on zinc and zinc alloy coated steel sheet, Osaka, Japan, 2007:248-253.
【8】Nunomura Y, Takasugi T. Plastic deformation and fracture behavior of galvannealed coating[J]. ISIJ International, 2003, 43(3):454-460.
【9】Moon-Hi Hong. Correlation between the microstructure of galvannealed coatings and the defoliation during press forming[J]. ISIJ International, 2005, 45(6):896-902.
【10】Michal G M, Janavicius P V, Paik Doo-Jin, et al. Direct observations of galvanneal coating delamination[C]//The 6th International Conference on Zinc and Zinc Alloy Coated Sheet Steels, Chicago, III.USA, 2004:517-525.
【11】Lee H, Jun C H, Song J, et al. The estimation of phase fractions in galvannealed steel sheet using independent component analysis[J]. Chemometrics and Intelligent Laboratory Systems, 2007, 87:81-87.
【12】Zhong W, Ng H F, Ichikawa M. Effect of coating characteristics on powdering performance of galvanneal coatings[C]//Proceedings of the 4th international conference on zinc and zinc alloy coated steel sheet, ISIJ, Tokyo, Japan, 1998:603-607.
【13】Lee K K, Lee I H, Lee C R, et al. In-situ observation in a scanning electron microscope on the exfoliation behavior of galvannealed Zn-Fe coating layers[J]. Surface and Coating Technology, 2007, 201:6261-6266.
【14】Garza L G, Van Tyne C J. Fraction and formability of galvannealed interstitial free sheet steel[J]. Journal of Materials Processing Technology, 2007, 187(12):164-168.
【15】Marder A R. The metallurgy of zinc-coated steel[J]. Progress in Materials Science, 2000, 45(3):191-271.
【16】Hertveldt I, De Cooman B C, Meseure K, et al. The shear strength of galvannealed coatings on IF steels[J]. ISIJ International, 1999, 39(12):1280-1288.
【17】Alpas A T, Inagaki J. Effect of microstructure on fracture mechanisms in galvannealed coatings[J]. ISIJ International, 2000, 40(2):172-181.
【18】张启富, 刘邦津, 黄建中. 现代钢带连续热镀锌[M]. 北京: 冶金工业出版社, 2007.
【19】Ochiai S, Iwamoto S, Nakamura T, et al. Crack spacing distribution in coating layer of galvannealed steel under applied tensile strain[J]. ISIJ International, 2007, 47(3):45458-465.
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