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Measurement and Modeling of the Stress-Strain State of the Surface of the Band at The Caliber Rolling By Deformation
Authors: B. Sereda and D. Sereda
As it is known the rolling in box passes system has a great influence on rolling billets. That is why the optimization of rolling in box passes is the actual problem need to be solved. In given work for deflected mode researching the modeling of rolling in box passes was done. The proposed mathematical model is based on phenomenological description of plasticity criterion.
Authors: Ning Peng, Ye-Dong He, Li-Bo Liang
Anode aluminum foil is etched in H 2SO 4 and H C l solutions to meet the development tendency of high capacitance and miniaturization for making aluminum electrolytic capacitor. But the currently etching technology often result in the tunnels etched with large sizes and distributed no-uniformly, thereby restricting the further increase of capacitance.
Authors: I. Khalfallah, A. Aning
The microstructural evolution and microhardness of the product of reverse peritectoid reaction in N i3M o alloy was studied. High-energy ball milling was used to produce a partially alloyed elemental nickel and molybdenum of Ni3Mo composition, cold-compacted and then sintered/solutionized at 1300oC for 100 h and quenched. y-Ni3Mo was formed isothermally at 600oC.
The Microstructure And Properties Of Ultra-High Strength Wear Resistance Steel Plate By A Novel Energy Conservation Process
Authors: Biao Ju, Huibin Wu, Di Tang, Pengcheng Zhang
A study of ultra-high strength wear resistance steel plate subjected to thermomechanical control process (TMCP) is presented. The dependence of the mechanical properties on the after rolled microstructure evolution was examined. With designed water cooling - relaxation - static air cooling process after hot rolling, the TMCP steel plate exhibited excellent combination of ultra-high strength and toughness, which is better than steel plate heat treated by conventional reheated quenching and tempering.
Authors: Ankit Saharan, Sohan Kale, and Martin Ostoja-Starzewski
Scale dependent homogenization is used to estimate the effective properties of heterogeneous materials with Gaussian correlated microstructures. Separation of scales (Micro, Meso, Macro) in these microstructures leads to the problem of determination of Representative Volume Element (RVE) that corresponds to the effective properties of materials.
Development Of Duplex High Temperature Gas Nitriding And Low Temperature Plasma Nitriding Surface Treatments For Uns S31803 Duplex Stainless Steel
Authors: L.B.Varela, X.Y. Li, C.E. Pinedo, H. Dong, A.P. Tschiptschin
Specimens of a UNS S31803 duplex stainless steel were (i) single low temperature plasma nitrided and (ii) high temperature gas nitrided, at 1200oC and low temperature plasma nitrided. Plasma nitriding treatments were carried out at 400°C by 20 h, in a 75%N2+25%H2 atmosphere, duplex surface treatment. The microstructure of the as received material is composed by ferrite and austenitic stringers, aligned in the rolling direction. Light optical microscopy (LOM), scanning electron microscopy (SEM), Xray diffraction (XRD) and electron-backscattered diffraction (EBSD) were used to characterize the microstructure.
Authors: M.M. Sadawy, A.F.Ismael, M.A.Gouda
This paper addresses the issue of modeling the uncertainty about the corrosion values of oil steel tank, at any particular unsampled location. Our method is based on using geostatistics technique for modeling steel tank thickness from nondestructive data.
Authors: Yunusa A. Balogun, Ryan Ubelhor
The likelihood of successful system operation following long periods of dormancy can be increased by assessing the long-term environmental effects on the performance of materials and subsystems. Because of the long experimental times often required in many accelerated aging programs, the need for faster and more reliable methods for investigating the degradative aging of polymeric materials under various environments becomes important.
Microstructural and Porosity Characterization During the Sintering Process Of 420 Stainless Steel Samples Using Powder Based 3D Printing
Authors: Yu Zhou, Sin Chien Siw and C. Isaac Garcia
A series of 420 stainless steel samples produced using the M-flex system (a powder-based 3D printer) were used to study the systematic evolution of the changes in porosity and grain size behavior after sintering.
Authors: Jonathan G. Jordan, Amy E. Richards
Computed Tomography (CT) is the process of imaging an object in all directions using X-rays and reconstructing image data to produce a duplicate, three-dimensional digital model of the scanned object. The internal and external structure of the object can then be viewed at any cross section, point, or angle.