Integrated system for design and products quality control based on additive technologies for high-tech industries
The article describes the functional structure of an integrated computer system that allows choosing the equipment for 3D printing on the basis of information and mathematical models to study the quality of printed high-tech polymeric and ceramic materials, as well as the necessary mode of its functioning. The integrated system includes the modules for selecting 3D printing technologies (extrusion, sintering) and 3D printers, a module for searching for the parameters of equipment for obtaining products of a given quality, a visualization module for simulation results, and a module for generating a product passport. The integrated system can be used as a training and educational system for training specialists in the field of additive technologies, taking into account the study of the complete life cycle of the synthesis of complex products (from studying the properties of composite materials and designing prototypes of products to assessing the quality of printed products). Testing of the computer system, which confirmed its operability, was carried out on the basis of the Engineering Center of SPbSIT (TU), the corporation Klöckner Pentaplast and Virial Ltd. (St. Petersburg). The use of an integrated system at enterprises of high-tech industries allows us to solve the problem of designing and managing the quality of complex products, saving raw materials and materials, which reduce the cost and time of production of high technology products.
Advances in 3D Printing & Additive Manufacturing Technologies
Influence of Process Parameters on Tensile Strength of Additive Manufactured Polymer Parts using Taguchi Method -- Determination and Comparison of the Anisotropic Strengths of Fused Deposition Modeling P400 ABS -- Estimating the Effect of Process Parameters on Build Time and Model Material Volume for FDM Process Optimization by Response Surface Methodology and Grey Relational Analysis -- Current Trends of Additive Manufacturing in the Aerospace Industry -- Influence of Oxygen Partial Pressure on Hydroxyapatite Coating of Additive Manufactured component by Pulsed Laser Deposition -- Electro Discharge Machining of Ti-alloy(Ti6Al4V) and 316LStainless Steel and Optimization of Process Parameters by Grey Relational Analysis (GRA) Method -- Multi-Objective Optimization of Mechanical Properties of Aluminium 7075 Based Hybrid Metal Matrix Composite using Genetic Algorithm -- A Review on Status of Research in Metal Additive Manufacturing -- Multi Response Optimization of Nd: YAG Laser for Micro Drilling of 304Stainless Steel using Grey Relational Analysis -- Additive Manufacturing at French Space Agency with Industry Partnership -- Wear Characterization of Direct Steel –H20 Specimens Produced by Additive Manufacturing Techniques -- Rapid Manufacturing of Customized Surgical Cutting Guide for the Accurate Resection of Malignant Tumor in the Mandible -- Implant Analysis on the Lumbar-Sacrum Vertebrae using Finite Element Method -- An Automated Acupressure Glove For Stress & Pain Relief Using 3D Printing -- Development and Optimization of Dental Crown using Rapid Prototyping Integrated with CAD.
Inhibition of Mild Steel Corrosion Using L-tryptophan and Synergistic Surfactant Additives
The corrosion inhibition characteristics of nitrogen containing amino acid L-tryptophan on mild steel in 0.1 M HCl solution, in the temperature range of 30-50 o C, was studied by weight loss and potentiodynamic polarization measurements. L-tryptophan significantly reduces the corrosion rates of mild steel; the maximum inhibition efficiency being 83% at 50 o C in presence of inhibitor concentration of 500 ppm. The effect of the addition of very small concentrations of anionic surfactant, sodium dodecyl sulfate (SDS), and of cationic surfactant, cetyl trimethyl ammonium bromide (CTAB), on the corrosion inhibition behavior of L-tryptophan was also studied. The inhibition efficiency (IE) of L-tryptophan significantly improved in presence of both surfactants. The effect of SDS and CTAB on the corrosion inhibition behavior of L-tryptophan appears to be synergistic in nature, the values of synergism parameter being greater than unity. The adsorption of inhibitors on mild steel surface obeyed Langmuir’s adsorption isotherm. The calculated thermodynamic parameters for adsorption reveal a strong interaction between the inhibitors and the mild steel surface. The results obtained by electrochemical studies are consistent with the results of the weight loss measurements. L-tryptophan acts more anodic than cathodic inhibitor.