热震对结构钢锈层裂纹的影响
Effect of Thermal Shock on Rust Layer on Structural Steel
摘 要
通过周浸加速腐蚀试验在结构钢表面形成了锈层,用压痕法测定了锈层的断裂韧性,在锈层及锈层/钢基体界面预制压痕裂纹,观测压痕裂纹在温度变化过程中的扩展行为,从而评价了锈层的抗热震性能.结果表明,锈层/钢基体界面的断裂韧性和抗热震能力均优于锈层本身,裂纹更倾向于在锈层中形核和扩展.温度变化可导致锈层中原有裂纹的扩展,但不会使裂纹在锈层中形核.
锈层
锈层/钢基体界面
热震
indentation test
rust layer
interface between the rust layer and steel
thermal shock
Abstract
In the present investigation,the rust layer was formed on structural steel after cyclic wet/dry test.The fracture toughness of the rust layer and the interfacial fracture toughness of the interface between the rust layer and the steel were measured by means of indentation test.Quench tests were performed to determine the thermal shock resistance of the rust layer and the interface.Both the interfacial fracture toughness and the thermal shock resistance of the interface were better than those of the rust layer.Indentation cracks tended to initiate and propagate in the rust layer rather than along the interface.The temperature change could cause an original crack propagating rather than a new crack nucleating in the rust layer.
中图分类号 TG172.3
所属栏目 试验研究
基金项目 国家“973”资助项目(2004CB619102); 新世纪优秀人才支持计划资助项目
收稿日期 2008/1/18
修改稿日期 2008/1/25
网络出版日期
作者单位点击查看
引用该论文: WANG Shu-tao,GAO Ke-wei,YANG Shan-wu,HE Xin-lai. Effect of Thermal Shock on Rust Layer on Structural Steel[J]. Corrosion & Protection, 2009, 30(3): 153～157
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参考文献
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【3】张全成,马峰,郑文龙.耐候钢表面保护性锈层与基体结合强度的研究[J].机械工程材料,2004,28(6):30-32.
【4】张全成,吴建生.耐候钢表面保护性锈层的力学性能[J].钢铁研究学报,2006,18(3):42-45.
【5】Yu F,Gao K W,Su Y J,et al.The fracture toughness of CO2 corrosion scale in pipeline steel[J].Material Letters,2005,59(14):1709-1713.
【6】Andersson T,Rowcliffe D J.Indentation thermal shock testr for ceramics[J].Journal of American Ceremic Society,1996,79(6):1509-1514.
【7】Pettersson P,Johnsson M,Shen Z.Parameters for measuring the thermal shock of cer materials with an indentation-quench method[J].Journal of the European Ceramic Society,2002,22(11):1883-1889.
【8】Yamashita M,Miyuki H,Matsuda Y,et al.The long term growth of the protective rust layer formed on weathering steel by atmospheric corrosion during a quarter of a century[J].Corrosion Science,1994,36(2):283-299.
【9】Misawa T,Hashimoto K,Shimodaira S.The mechanism of formation of iron oxide and oxyhydroxides in aqueous solutions at room temperature[J].Corrosion Science,1974,14(2):131-149.
【10】Anstis G R,Chantikul P,Lawn B R,et al.Critical evaluation of indentation techniques for measuring fracture toughness:I,direct crack measurements[J].Journal of American Ceremic Society,1981,64(9):533-538.
【11】Chicot D,Demarecaux P,Lesage J.Apparent interface toughness of substrate and coating couples from indentation tests[J].Thin Solid Films,1996,283(1/2):151-157.
【12】Lasage J,Chicot D.Role of residual stresses on interface toughness of thermally sprayed coatings[J].Thin Solid Films,2002,415(1/2):143-150.
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