| 新型超高强度钢应力腐蚀断裂行为研究 |
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| 引用本文： | 刘建华,田帅,李松梅,于美.新型超高强度钢应力腐蚀断裂行为研究[J].航空学报,2011,32(6):1164-1170. |
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| 作者姓名： | 刘建华 田帅 李松梅 于美 |
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| 作者单位： | 北京航空航天大学材料科学与工程学院,北京,100191 |
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| 摘 要： | 采用恒载荷拉伸应力腐蚀实验研究了23Co14Ni12Cr3及40CrNi2Si2MoVA两种超高强度钢在质量分数为3.5％的NaCl溶液中的应力腐蚀开裂行为,为两种超高强度钢在结构件中的安全使用提供数据依据.通过金相显微镜和扫描电镜(SEM)对两种超高强度钢的显微组织以及断口形貌进行了分析.恒载荷拉伸应力腐蚀实验结果表...
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| 关 键 词： | 超高强度钢 拉伸应力腐蚀 断裂行为 NaC1溶液 断裂形貌 |
| 收稿时间： | 2010-09-07; |
Stress Corrosion Crack of New Ultrahigh Strength Steel |
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| LIU Jianhua,TIAN Shuai,LI Songmei,YU Mei.Stress Corrosion Crack of New Ultrahigh Strength Steel[J].Acta Aeronautica et Astronautica Sinica,2011,32(6):1164-1170. |
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| Authors: | LIU Jianhua TIAN Shuai LI Songmei YU Mei |
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| Institution: | School of Materials Science and Engineering,Beihang University,Beijing 100191,China |
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| Abstract: | The behavior of stress corrosion crack of two kinds of ultrahigh strength steel, 23Co14Ni12Cr3 and 40CrNi2Si2MoVA, in 3.5% NaCl solution are investigated with the constant load tensile stress corrosion method. The microstructure and fracture surface of the two ultrahigh strength steels are analyzed by metalloscopy and scanning electron microscopy (SEM). The results of constant load tensile stress corrosion test show that at the same stress level the fracture time of steel 23Co14Ni12Cr3 is longer than that of 40CrNi2Si2MoVA, which means 23Co14Ni12Cr3 possesses better corrosion resistance. The fracture morphology analysis shows that the fracture surface of the two ultrahigh strength steels has the characteristic of intergranular fracture and dimple fracture under the joint action of stress and corrosive solution. |
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| Keywords: | ultrahigh strength steel tensile stress corrosion fracture behavior NaCl solution fracture morphology |
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