Papers by Keyword: Mild Steel

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Authors: M.F. Achoi, Mohd Nor Asiah, Mohamad Rusop, Saifollah Abdullah
Abstract: TiO2 nanocoated mild steel surface has been successfully prepared via 100 watt of RF magnetron sputtering by using TiO2 target and sputtering condition was performed in 80sccm argon gas. The studied was done in comparing the surface properties of TiO2 nanocoated mild steel between short term and long term sputtering time at 5 and 60 minutes, respectively. From the results, we have found that the long-term sputtering time producing good surface coating with lower surface roughness at 0.033 nm with thickness in nanometer scale is 169 nm via AFM. Through Auger study revealed that the coating attributed Ti and O elements at energy of 383.48 eV and 483.44 eV, respectively. It was also showed that the intensity of that element high at about 100k a.u. in long-term compared to 55k a.u. short-term of sputtering time. It is thus showed that producing coating depends upon manipulation of parameter in RF magnetron sputtering.
Authors: Yool Kwon Oh, Ho Dong Yang, Yong Bum Kim
Abstract: In the present study, numerical work applying a finite element method (FEM) is used to analyze the characteristics of aluminum (Al) alloy mold for thermal strain control. In the concrete, the temperature distribution on the inside of Al alloy mold, the contraction rate and stress occurred by temperature variations are investigated to predict the accurate measurement variation of Al alloy mold during the cooling process. In addition, the numerical result of the Al alloy mold were compared with those of mild steel mold in order to obtain the improvement and good quality of mold. In the end, the numerical results such as temperature distributions, contraction rate and stress are presented to help to make the effective and the best mold products. Besides, the introduced technique of numerical analysis applying a FEM is very useful and important things in the fracture and damage mechanics, especially needs the accuracy improvement such as Al alloy mold products.
Authors: Jia Guo, Ke Gui Xin, Wei Ping Wu, Ming Hua He
Abstract: A self-centring bridge pier is a combination of elastic recovery devices and internal or external energy dissipaters. During the cyclic loading test, it is proved that the self-centring system can minimize the residual drift of the pier whereas holding sufficient energy dissipate capacity as well as bearing capacity. It is worth noting that a simplified analytical model is proposed based on the experimental response regarding flexural deformation, unbounded length of mild steels and strain penetration. Comparison between the analytical model and test results has indicated that a reasonable envelope of the cyclic behavior of the system can be achieved by the model presented.
Authors: Mehdi Soodi, S.H. Masood, Milan Brandt
Abstract: Laser cladding is a thermal process for depositing a metallic alloy on to a parent metal to repair corrosion, erosion, wear or other physical damage. The present work studies the effects of the laser cladding process on the integrity of metal substrates and the bond between the cladding layer and the base metal. It also evaluates some physical characteristics of the cladding layer, in this case grade 420 stainless steel. The research compares the work with Tungsten Inert Gas (TIG) welding and concludes that, due to the small size of the heat-affected zone, this laser cladding process does not adversely affect the physical properties of the metallic substrates.
Authors: Tie Jun Su, Ke Hua Li
Abstract: The corrosion inhibition of mild steel in 5.0 M HCl by 1–phenylaminomethyl-benzimidazo -le (PMB) was studied by gravimetric and potentiodynamic polarization methods. Inhibition efficiency of PMB increased with increase in the concentration of inhibitor and decreased with the increase in temperature. PMB acts as anodic-type inhibitor for mild steel. The adsorption of PMB on mild steel surface obeys the Langmuir adsorption isotherm.
Authors: Elyor Berdimurodov, Abduvali Kholikov, Khamdam Akbarov, Innat Nakhatov, Nigora Kh. Jurakulova, Nurbek Umirov
Abstract: This article showed that new mixed inhibitor type of cucurbit [n] urils based corrosion inhibitors with gossypol at the proportion of 50:50 is excellent efficiency for mild steel in in alkaline media containing chloride ions. The Polarization Resistance results suggest that this inhibitor decreased the rate of anodic mild steel dissolution and cathodic hydrogen evolution. Increased activation energy suggested that inhibitors adsorb physically during the first step of the adsorption process.
Authors: Je Se Choi, Yool Kwon Oh
Abstract: In the present study, AC7A aluminum alloy casting mold which consist of 8 pieces is introduced as an analysis model. Also, numerical work using a finite element method was applied to investigate the thermal strain that included the temperature distribution, stress and strain during the cooling process in AC7A casting mold. In addition, the numerical work was carried out that analysis results of the AC7A casting mold were compared with those of mild steel casting mold to prove the improvement and good quality. The numerical results such as temperature distributions, stress and strain are presented to help to make the effective and the best tire mold. In addition, the introduced technique of numerical work using a finite element method is very useful and especially needs to improve the precision of tire mold such as sectional type or puzzle type.
Authors: Atria Pradityana, Sulistijono, Abdullah Shahab
Abstract: The use of Myrmecodia Pendans (MP) extract as mild steel corrosion inhibitor in 3.5% NaCl media was investigated using weight loss and potentiodynamic polarization methods as well as characteristics analysis of the Fourier Transform Infra-Red (FTIR). Obtained data from weight loss and potentiodynamic polarization methods has shown the value of inhibition efficiency (% IE) is proportional toadded inhibitor concentration. Tafel constants data indicates that MP extract can act as cathodic and anodic inhibitors (type of mixed inhibitor). FTIR analysis also demonstrates the characteristics of MPextract. Occured inhibition mechanism was in the form of inhibitor adsorption process on metal surfacethat allegedly preceded by physical adsorption followed by chemical adsorption. Chemical adsorption is conceivable since metal surface scoping elevates as the increasing of inhibitor concentration.
Authors: Z. Petrakou
Abstract: Mild steel is one of the most commonly used materials in both industry, construction and other commercial –less or more elaborated- applications, and therefore the need of the appliance of an efficient and precise non-destructive testing method is requisite and mandatory. Here we report the experimental study of one of the most significant properties of mild steel, that of hardness, that can substantially reveal important facts such as the grade of deformation and work-hardening of steel, with the use of Barkhausen Noise Analysis. We also studied how the magnetic and mechanical properties of this specific metallic material can be successfully correlated.
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