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Effect laws and mechanisms of different temperatures on isothermal tensile fracture morphologies of high-strength boron steel 被引量:1
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作者 刘佳宁 宋燕利 +1 位作者 路珏 郭巍 《Journal of Central South University》 SCIE EI CAS CSCD 2015年第4期1191-1202,共12页
The fracture behaviour and morphologies of high-strength boron steel were investigated at different temperatures at a constant strain rate of 0.1 s-1 based on isothermal tensile tests. Fracture mechanisms were also an... The fracture behaviour and morphologies of high-strength boron steel were investigated at different temperatures at a constant strain rate of 0.1 s-1 based on isothermal tensile tests. Fracture mechanisms were also analyzed based on the relationship between microstructure transformation and continuous cooling transformation(CCT) curves. It is found that 1) fractures of the investigated steel at high temperatures are dimple fractures; 2) the deformation of high-strength boron steel at high temperatures accelerates diffusion transformations; thus, to obtain full martensite, a higher cooling rate is needed; and 3) the investigated steel has the best plasticity when the deformation temperature is 750 °C. 展开更多
关键词 high-strength boron steel fracture morphology isothermal tensile test
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Effects of Strain Rate on Stress Corrosion of S355 Steel in 3.5% NaCl Solutions
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作者 金亦富 SHENG Tianyuan +3 位作者 KONG Weicheng ZHANG Ruihong WANG Wenchang 孔德军 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2016年第6期1381-1386,共6页
The stress corrosion of S355 steel in 3.5% NaCl solution under the different strain rates was analyzed with the slow strain rate test(SSRT), the stress corrosion cracking(SCC) behaviors of S355 steel under the dif... The stress corrosion of S355 steel in 3.5% NaCl solution under the different strain rates was analyzed with the slow strain rate test(SSRT), the stress corrosion cracking(SCC) behaviors of S355 steel under the different strain rates in the solution were investigated, and the fracture morphologies and compositions of corrosion products under the different strain rates were analyzed with scanning electron microscopy(SEM) and energy dispersive spectrometerry(EDS), respectively. The experimental results show that the SCC sensitivity index is the highest when the strain rate is 2×10-6, and the medium corrosion is the main reason resulting in the highest SCC sensitivity index. The SCC sensitivity index is the least when the strain rate is 5×10-6, and the stress is the main reason resulting in the stress corrosion. The SCC sensitivity index is the middle when the strain rate is 9×10-6, the interaction of stress and medium is the stress corrosion fracture mechanism. 展开更多
关键词 strain rate slow strain rate test S355 steel stress corrosion fracture morphology
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