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| 1 | Corrosion Evolution of Reinforcing Steel in Concrete under Dry/Wet Cyclic Conditions Contaminated with Chloride显示文摘The corrosion evolution of rebar in concrete was monitored by electrochemical impedance spectroscopy(EIS) under dry/wet alternated accelerated corrosion test.Four stages with different dynamic characteristics were observed during the corrosion evolution.They were passive stage,local corrosion controlled by the charge transfer step,accelerated corrosion controlled by the mass transfer step,and constant rate corrosion controlled by the mass transfer step through a barrier layer.X-ray diffraction(XRD) analysis showed that the corrosion product of rebar in mortar was composed of α-FeOOH,γ-FeOOH and Fe 3 O 4.The corrosion mechanisms of all four stages were discussed and the corrosion reactions were proposed according to the corrosion product and corrosion evolution characteristics. | J.Wei X.X.Fu J.H.Dong W.Ke | 2012 | Journal of Materials Science & Technology2012，28，10： | 11 |
| 2 | High mechanical strengths and ductility of stainless steel 304L fabricated using selective laser melting显示文摘Achieving not only high mechanical strengths but also high ductility is recently established using an additive manufacturing technique called selective laser melting. In the present study, stainless steel 304 L fully dense samples were successfully printed using the 3 D systems – ProX 300 printing machine. The ductility and tensile yield strength were almost two and three times higher compared to those of ASTM cast's alloy. Honey comb like nano-cellular structure with different orientation was observed in the fine grains(~4μm) due to fast cooling rate. In addition, the formation of martensite phase in random grains is also a contributor to the strengths. Furthermore, negative residual stresses in the build and horizontal directions were detected and assisted further increase in the tensile strength. Fractography revealed the ductile feature of plastic deformation and the crack openings at unmelted particles or pores. | Q.B.Nguyen Z.Zhu F.L.Ng B.W.Chua S.M.L.Nai J.Wei | 2019 | Journal of Materials Science & Technology2019，35，2： | 8 |
| 3 | 查看详情显示文摘 | J.W.Zheng S.M.L.Nai M.F.Ng P.Wu J.Wei and M.Gupta | | 0，，03： | 1 |
| 4 | 查看详情显示文摘 | J.Wei S.J.Xu | | 0，，： | 1 |
| 5 | Stability and Hopf bifurcation analysis on a simplified BAM neural network with delays显示文摘 | Y.Song M.Han J.Wei | | 0，，200： | 1 |
| 6 | Nitrogen Contents on Tribological Properties of Magnetron Sputtered SICN Coatings显示文摘Silicon carbonitride (SiCN) coatings were deposited on silicon and tungsten carbide substrates by co-sputtering silicon and carbon in argon and nitrogen mixture atmosphere using magnetron-sputtering system. The effect of the N2 concentration, RF substrate bias voltage and target current on film deposition rate, roughness, adhesion, mechanical and tribological properties of coatings were investigated. The deposition rate was found to increase with the increasing nitrogen concentration. X-ray photoelectron spectroscopy analysis showed that high nitrogen concentration in the nitrogen-argon gas mixture enhanced the incorporation of C and N but reduced the incorporation of Si. SiCN coatings have good tribological properties at a N2 concentration of approximately 60%. | TIETUNSUN Y.Q.FU J.WEI H.J.DU | 2004 | 材料热处理学报2004，25，05B： | 0 |
| 7 | 挥之不去的阴影:中国高等教育获取的不平等显示文摘在现代中国,高等教育获取的问题始终为社会所瞩目,主要原因在于,高等教育是社会向上流动的核心渠道。也是社会公平的重要指标。但是高等教育获取不平等的问题却变得日益突出,正在成为中国社会挥之不去的阴影。 | 李馨宇 P.Loyalka J.Chu J.Wei N.Johnson J.Reniker | 2017 | 文化纵横2017，，3： | 0 |
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