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Relevant bibliographies by topics / Hydrostatic extrusion. Stress concentration

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Academic literature on the topic 'Hydrostatic extrusion. Stress concentration'

Author: Grafiati

Published: 4 June 2021

Last updated: 7 February 2022

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Journal articles on the topic "Hydrostatic extrusion. Stress concentration"

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Topolski, K., H. Garbacz, P. Wiecinski, W. Pachla, and K. J. Kurzydłowski. "Mechanical properties of titanium processed by hydrostatic extrusion." Archives of Metallurgy and Materials 57, no. 3 (2012): 863–67. http://dx.doi.org/10.2478/v10172-012-0095-3.

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The mechanical properties of titanium Grade 2 subjected to the hydrostatic extrusion technique (HE) were investigated. The hydrostatic extrusion technique is a method which refines the titanium grains to a nano-metric size. Compared with coarse grained titanium (CG-Ti), nanocrystalline titanium (NC-Ti) is characterized by a much higher yield stress, tensile strength and microhardness. The yield stress of NC-Ti determined in tensile tests is higher than that measured in compression test. The Young modulus of NC-Ti is slightly lower than that of CG-Ti.

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Dryden, John. "Stress concentration in polymer extrusion dies." Acta Mechanica 219, no. 3-4 (2011): 269–79. http://dx.doi.org/10.1007/s00707-011-0450-x.

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Li, Yang, and Ren Shu Yuan. "Forming Analysis of AZ80 Magnesium Alloy Thick-Walled Tube Fabricated by Hydrostatic Shrinkage Extrusion." Materials Science Forum 950 (April 2019): 80–84. http://dx.doi.org/10.4028/www.scientific.net/msf.950.80.

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In order to obtain high performance magnesium alloy thick-walled tubes, the magnesium alloy ingot was extruded by hydrostatic shrinkage extrusion technology. Through a series of experiments, it was found that the magnesium alloy tube was not formed in the extrusion ratio that is smaller than 2.11 . Deform-3D software was used to simulate the tube forming process under different extrusion ratios. It was noting that at the condition of the extrusion ratio of 2.11, the equivalent stress and strain of the extruded tube at the fixed sizing zone were obviously unevenly distributed, which was disappe

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Wu, Zhi Lin, Duo Xiang Wu, Ren Shu Yuan, Lei Zhao, and Yan Bao Zhao. "Electrochemical Corrosion Behavior of AZ80 Magnesium Alloy Tube Fabricated by Hydrostatic Extrusion." Applied Mechanics and Materials 624 (August 2014): 77–81. http://dx.doi.org/10.4028/www.scientific.net/amm.624.77.

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The corrosion behavior of hydrostatic extruded tube AZ80 magnesium alloy was investigated by polarization curves and electrochemical impedance spectroscopy (EIS) in simulated atmosphere. The results indicated that, the corrosion resistance of the hydrostatic extruded AZ80 magnesium alloy with uneven deformed grains and increased sub-grains were obviously weakened, with larger corrosion current density in the polarization curves and lower corrosion resistances in the electrochemical impedance spectroscopy plots. This was mainly because of the hydrostatic extrusion which made AZ80 magnesium allo

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Lee, Jong Sup, Yong Bae Kim, Geun An Lee, Dong Su Bae, Jun Pyo Park, and Sang Mok Lee. "A Study on Hydrostatic Extrusion of Al Duo-Casted Billet." Advanced Materials Research 630 (December 2012): 18–22. http://dx.doi.org/10.4028/www.scientific.net/amr.630.18.

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In this study, a Hydro Co-Extrusion Process of Al-Mn/Al-Si hybrid alloys prepared by electromagnetic duo-casting was investigated. Sleeve of the duo-casted billets is 3003 Al-Mn alloy and core is 4004 Al-Si alloy. It is expected hydrostatic stress during the HCE process enhances formability of materials and minimize any defects in extruded billets due to different material properties between two Al alloys. The duo-casted billet was extruded at temperature of 423K and with extrusion ratio of 5. Finally, the effect of the HCE on microstructure of the billet was investigated by an optical microsc

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Zhang, Chao Hui, Yuan Liang, and Fu Chi Wang. "Numerical Simulation of Hydrostatic Extruding Cu/Al Bimetal Clad through Equal-Strain Contour Concave Die." Materials Science Forum 575-578 (April 2008): 792–98. http://dx.doi.org/10.4028/www.scientific.net/msf.575-578.792.

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A bimetal composite material is a variant of the typical composite that is composed of two materials joined at their interface surface. The advantage of clad material is that the combination of different properties of materials can satisfy both the need of good mechanical properties and the demand of user such as electrical properties simultaneously. This paper is concerned with the hydrostatic extrusion process of copper-clad aluminum rod. The commercially available finite element program ANSYS was used to simulate the process of hydrostatic extrusion for Cu/Al bimetal composite through the e

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Modławski, Michał, Jacek Nabiałek, and Tomasz Jaruga. "Computer simulation of the load test of an extrusion blow moulded product." MATEC Web of Conferences 157 (2018): 01012. http://dx.doi.org/10.1051/matecconf/201815701012.

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The results of compression "top load" test of an extrusion blow moulded container, performed in ANSYS Mechanical software, were presented. The non-uniform wall thickness of the blown product was considered because the thickness distribution was the result of the first step of the simulation in ANSYS Polyflow - the simulation of the product manufacturing by extrusion blow moulding. The hydrostatic pressure factor was taken into account during the "top load" simulation, because such a test is usually done for filled products. It was found that the biggest stress values occur around the inlet as

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Lim, L. G., and F. P. E. Dunne. "Modelling void nucleation and growth in axisymmetric extrusion." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 211, no. 4 (1997): 285–97. http://dx.doi.org/10.1243/0954405971516266.

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Elastic-viscoplastic constitutive equations, with kinematic and isotropic hardening, are employed to model the deformation behaviour of an aluminium alloy in extrusion. Constitutive equations are also employed for void nucleation and growth, which are fully coupled with the deformation behaviour. The material model is employed to investigate the roles of void nucleation and growth in extrusion defect formation. It has been shown that central bursting is a void growth controlled process. The existence of nucleated voids only leads to central burst formation with the existence of appropriate str

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Kaganovsky, Yuri S., Lyudmila N. Paritskaya, V. V. Bogdanov, and Witold Łojkowski. "Stress Relaxation Mechanisms during Cd₂₁Ni₅ Intermetallic Growth under High Hydrostatic Pressure." Defect and Diffusion Forum 264 (April 2007): 123–32. http://dx.doi.org/10.4028/www.scientific.net/ddf.264.123.

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Stress relaxation processes accompanying intermetallic growth during reactive diffusion between Cd and Ni have been studied by the methods of optical and scanning electron microscopy, provided with X-ray microanalysis. The experiments were carried out with the two-layer Cd-Ni samples at 250 and 280oC under hydrostatic pressures 350-900 MPa. The observed processes have been compared with those occurred at low pressures to demonstrate that the mechanisms of stress relaxation and thus the kinetics of intermetallic growth essentially depend on applied hydrostatic pressure. New mechanisms of stress

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Richert, M. W., B. Leszczyńska-Madej, W. Pachla, and J. Skiba. "The Microstructure and Properties of Hydrostatically Extruded Polycrystalline Aluminium Al99.5 / Mikrostruktura I Własności Wyciskanego Hydrostatycznie Polikrystalicznego Aluminium Al99.5." Archives of Metallurgy and Materials 57, no. 4 (2012): 911–17. http://dx.doi.org/10.2478/v10172-012-0100-x.

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The changes of Al99.5 microstructure and properties deformed by hydrostatic extrusion process in the conditions of constant strain rate (1.35×102s-1) and variable deformation (φ = 1.44÷2.85) were investigated. The samples were investigated by means both optical (LM) and transmission electron microscopy (TEM). The size of subgrain was statistically measured by mean chord. To establish the influence of hydrostatic extrusion on the properties of the polycrystalline aluminium Al99.5, the microhardness was measured and the tensile test was performed. The bands and shear bands were the characteristi

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Dissertations / Theses on the topic "Hydrostatic extrusion. Stress concentration"

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Gudal, Sameer. "Investigation of the extrusion pressure requirements and the residual stress distribution in orthodox and augmented hydrostatic extrusion." Ohio : Ohio University, 1993. http://www.ohiolink.edu/etd/view.cgi?ohiou1175706127.

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Book chapters on the topic "Hydrostatic extrusion. Stress concentration"

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Ogawa, Teruo, Akira Katoh, and Masatoshi Sonoda. "Molecular Mechanisms of CO2 Concentration and Proton Extrusion in Cyanobacteria." In Stress Responses of Photosynthetic Organisms. Elsevier, 1998. http://dx.doi.org/10.1016/b978-0-444-82884-2.50015-7.

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Conference papers on the topic "Hydrostatic extrusion. Stress concentration"

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Ozeki, Go, A. Toshimitsu Yokobori, Toshihito Ohmi, et al. "Effect of Pre-Heat Treatment on Hydrogen Concentration Behavior of y-Grooved Weld Joint Based on a Coupled Analysis of Heat Transfer-Thermal Stress-Hydrogen Diffusion." In ASME 2018 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/pvp2018-84178.

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Hydrogen induced cracking occurs at the welded position of the structure due to concentration of hydrogen during cooling process of welding. In order to prevent the hydrogen induced cracking, Pre-Heat Treatment (PHT) is conducted. However, since PHT takes high cost, it is important to find out the suitable PHT condition based on computational mechanics. One of authors has been proposed α multiplication method which magnifies the hydrogen driving term in the diffusion equation to find out detailed behaviors of hydrogen concentration around a local stress field. In this study, in order to clarif

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Kim, Y., Y. J. Chao, M. J. Pechersky, and M. J. Morgan. "Investigation of Hydrogen Transport Related Fracture in Stainless Steels." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-13823.

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Stress-assisted hydrogen diffusion analysis was performed on arc-shaped tension specimen (C-specimen) fabricated from Type 21-6-9 stainless steel. Two-dimensional finite element method was applied for the determination of elastic-plastic crack front stress fields, which was later coupled with hydrogen diffusion analyses. The extension of Fick's rule was used as the governing equation for the diffusion analysis. The distributions of hydrogen concentration were compared under various Internal Hydrogen Embrittlement (IHE) and Hydrogen Environment Embrittlement (HEE) conditions. Without any extern

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Kato, Mitsuaki, Takahiro Omori, Akihiro Goryu, Tomoya Fumikura, and Kenji Hirohata. "Electromigration Analysis of Solder Joints for Power Modules Using an Electrical-Thermal-Stress Coupled Model." In ASME 2020 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/ipack2020-2556.

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Abstract Power modules are being developed with the aim of increasing power output. Achieving this aim requires increased current density in power modules. However, at high current densities, power modules can degrade as a result of electromigration, which is a phenomenon where atoms move due to momentum transfer between conducting electrons and metal atoms. In addition, atoms are also moved by mechanical stress gradients and temperature gradients, so it is necessary to consider the combined effects of electrical, thermal, and mechanical stress. This report describes an electromigration analys

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Hsiao, C. C., P. S. Wei, and K. Y. Chen. "Universal Force Diagrams of a Microbubble in Static Fluid on a Surface." In ASME 2008 First International Conference on Micro/Nanoscale Heat Transfer. ASMEDC, 2008. http://dx.doi.org/10.1115/mnht2008-52048.

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Universal dimensionless three-dimensional universal lift force diagrams for a microbubble (or pendant drop) in a static liquid on a solid surface (or orifice) are presented in this work. Studying microbubble dynamics is important due to its controlling mass, momentum, energy and concentration transfer rates in many micro- and nano-sciences and technologies. In this study, dimensionless force diagrams are introduced by applying the solutions for microbubble shape for small Bond number in literature. A parametric study reveals that two dimensionless independent parameters, Bond number and contac

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Booth, Martin, and Michael Martin. "Use of the Extended Finite Element Method in the Assessment of Delayed Hydride Cracking." In ASME 2016 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/pvp2016-63156.

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Zirconium alloys, as used in water-cooled nuclear reactors, are susceptible to a time-dependent failure mechanism known as Delayed Hydride Cracking, or DHC. Corrosion of zirconium alloy in the presence of water generates hydrogen that subsequently diffuses through the metallic structure in response to concentration, temperature and hydrostatic stress gradients. As such, regions of increased hydrogen concentration develop at stress concentrating features, leading to zirconium hydride precipitation. Regions containing zirconium hydride are brittle and prone to failure if plant transient loads ar

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Kato, Mitsuaki, Takahiro Omori, Akihiro Goryu, Tomoya Fumikura, and Kenji Hirohata. "Electromigration Analysis of Power Modules by Electrical-Thermal-Mechanical Coupled Model." In ASME 2019 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/imece2019-10558.

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Abstract Power semiconductors and modules are basic components of electrical infrastructure and are currently widely used in applications such as power conversion devices, industrial equipment, railways, and automobiles. Power modules are being developed with the aim of downsizing and increasing power output. With the larger current densities and higher operating temperatures associated with downsizing and increasing power output, degradation of power modules can occur as a result of electromigration. Electromigration is a phenomenon where atoms move due to the momentum transfer between conduc

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Zou, Shikun, and Ziwen Cao. "The Fatigue Properties of Laser Shock Processed Aluminum Alloy 7050." In ASME 2007 Pressure Vessels and Piping Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/pvp2007-26047.

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In order to develop the application of laser shock processing (also named laser peening or LSP in short) as a strengthening technology for 7050 aluminum alloy fastener holes, the fatigue properties of laser shock-processed aluminum alloy specimens were investigated. At first, the dislocation density and surface residual stress induced in the shock affected zone was characterized and compared with that of the base material. Then, the fatigue specimens with stress-concentration hole (notch) were treated by LSP. The fatigue life of LSP-treated specimens were measured and compared with that of spe

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Fernando, Upul S., and Michelle Davidson. "Fatigue Life Assessment of Single Layer 60512 PVDF Barrier in Unbonded Flexible Risers." In ASME 2015 34th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/omae2015-41329.

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The polymeric barrier is one of the key components in a flexible pipe, the sound function of which is essential for the containment of the transported medium, ensuring no leakage to the environment which could result in undesired consequences. According to API 17J the barrier design must be able to sustain certain static and dynamic strain conditions however; the actual design or the fatigue assessment of the barrier is not covered within the standard. Since the barrier is subjected to the same dynamic loading as the pipe the durability and integrity of the barrier is a key issue that needs to

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