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  • 1
    Electronic Resource
    Electronic Resource
    Effect of the Surface Defects on Hydroformability of Aluminum Alloys (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 340-341 (June 2007), p. 587-592 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Extruded aluminum alloys, which are highly versatile, have relatively modest prototypingcost, good strength and corrosion resistance. Because there is no weld seam, the circumferentialmechanical properties may be uniform and advantageous for hydroforming. However, surface defectssuch as die lines and pick-up can be generated during the extrusion especially due to imperfections onthe die surface. In this study, the extent of the crack propagation caused by die lines is evaluatedaccording to the deformed shape of the tube in hydroforming process. And when forming a extrudedaluminum tube, the deformed surface of the tube frequently becomes rougher with increasing plasticstrain. This is well known as orange peel phenomenon and it has a significantly effect not only on thesurface quality of a final product but also on the forming limit. To evaluate the effects of the orangepeel on the hydroformability, the inter-stage polishing has been performed. Through the several testsincluding hydroforming test, the effect of surface defects on the hydroformabilities are well defined
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/54/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.340-341.587.pdf
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  • 2
    Electronic Resource
    Electronic Resource
    Web Based Shape Inspection System for the Forging Products Having Complicated Shapes (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 340-341 (June 2007), p. 719-724 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The outer race of the constant velocity(CV) joint is an important load-supportingautomotive part, which transmits torque between the transmission and the wheel. The outer race isdifficult to be forged, because its shape is very complex and the required dimensional tolerances arevery stringent. Therefore, the internet based shape inspection system is developed in this study toprovide quick and accurate measuring data. Proposed system uses mechanical displacement sensorsto measure the shape of CV joint that has six inner ball grooves, and commercially available Lab-View program is used to process measured data into the dimensional shape. Developed programprovides a simple user interface that enables users to have real-time access of data measured fromindustrial production lines. Furthermore, the measured data can be exchanged via the internetbetween users and forging system operators. A java applet helped the system connection viainternet. A data, IP access, is transmitted to the packet by TCP/IP. Our proposed system has manyadvantages over current measuring systems including fast and efficient data processing by real-timemeasuring, and system flexibility
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/54/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.340-341.719.pdf
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Effects of the Process Parameters on Beads by Plasma Arc Welding of the Membrane for LNG Ships (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 26-28 (Oct. 2007), p. 507-510 
    Details
    ISSN: 1662-8985
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The membrane, which forms the primary barrier of the cargo tank onboard LNG carrier,is made of corrugated sheets, angle pieces and sealing caps and so on. These components aremanufactured from SUS 304L sheets of 1.2mm thickness and assembled by the plasma welding.There are several welding defects such as overlap, excessive convexity, excessive concavity of weldand incomplete inclusion in the plasma welding. These unacceptable portions of the weld should beremoved and repaired in order to prevent propagation of the defects. So a study is undertaken todetermine the optimum process parameters such as the welding current, traveling speed, gas flowrates and frequency in the plasma lap welding process for LNG ships in order to prevent thesedefects. The polished and etched surface of the welded membrane sheet is examined if the crosssection shows a properly made weld. And the tensile tests are conducted to consider if the tensilestrength is less than the minimum required for the parent metal of the membrane sheet
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.26-28.507.pdf
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  • 4
    Electronic Resource
    Electronic Resource
    Residual Stress Relief and Redistribution of Welded Metals by Vibratory Stress Relaxation (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 580-582 (June 2008), p. 419-423 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: In this study, research work on the effects of vibrational energy on the microstructure ofwelds and Charpy toughness is performed. The results show that vibration during welding exhibitspositive effects on the microstructure constituent formation by reducing the amount and thicknessof grain boundary ferrite and suppressing the formation of the Widmanstatten structure. And alsodue to the finer microstructure developed by the vibration, toughness value of the weld metalincreases
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/18/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.580-582.419.pdf
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  • 5
    Electronic Resource
    Electronic Resource
    Texture Evolution during Uniaxial Compression of Hot-Rolled AZ31 Mg Alloy (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 539-543 (Mar. 2007), p. 1713-1718 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Uniaxial compression tests on hot-rolled AZ31 Mg alloy were carried out at 200°C. Inorder to investigate the evolution of texture during plastic deformation, cylindrical specimens werecompressed to the rolling and normal directions. Experimental investigation reveals that workhardening and texture evolution are strongly dependent on the loading direction. The occurrence ofdeformation twinning was revealed by the observation of microtexture using electron backscatterdiffraction (EBSD). A visco-plastic self-consistent (VPSC) polycrystal model was used to simulatethe texture evolution during the uniaxial compression. The texture evolution induced bycrystallographic slip and deformation twinning can be explained by the relative activity of eachdeformation modes
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/15/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.539-543.1713.pdf
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  • 6
    Electronic Resource
    Electronic Resource
    Simulation of Primary Recrystallization in Automotive Steels by Consideration of Particle Pinning (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 558-559 (Oct. 2007), p. 171-176 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: A modified two dimensional (2-D) Monte Carlo (MC) technique was used to simulateprimary recrystallization in automotive steels containing fine particles. In order to consideranisotropic properties of grain boundary energy and grain boundary mobility, functions of boundarymisorientation were introduced. Orientation-dependent stored energy developed in 80% cold-rolledinterstitial free (IF) sheet steel was evaluated by reconstructing of data measured using electronback-scattered diffraction (EBSD) analysis. A subgrain method based on subgrain structure is usedfor quantitative analysis of the stored energy. The simulation reveals that particles affect evolution ofmicrostructure during recrystallization. The simulation provided a theoretical foundation forunderstanding effect of particles on the final microstructures and crystallographic textures
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/17/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.558-559.171.pdf
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  • 7
    Electronic Resource
    Electronic Resource
    Biological screening of 100 plant extracts for cosmetic use (II): anti-oxidative activity and free radical scavenging activity (1997)
    Oxford, UK : Chapman and Hall
    International journal of cosmetic science 19 (1997), S. 0 
    Details
    ISSN: 1468-2494
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Methanol aqueous extracts of 100 plants were screened for anti-oxidative activity using Fenton's reagent/ethyl linoleate system and for free radical scavenging activity using the 1,1-diphenyl-2-picryl hydrazyl free radical generating system. The results suggest that 14 plants - Alpinia officinarum, Areca catechu, Brassica alba, Cannabis sativa, Curcuma longa, Curcuma aromatica, Eugenia caryophyllata, Evodia officinalis, Paeonia suffruticosa, Rhaphanus sativus, Rheum palmatum, Rhus verniciflua, Trapa bispinosa, Zanthoxylum piperitum - may be potential sources of anti-oxidants. Eight plants - Citrus aurantium, Cornus officinalis, Gleditsia japonica, Lindera strychnifolia, Phragmites communis, Prunus mume, Schizandra chinensis, Terminalia chebula - may be the potential source of free radical scavengers from natural plant. Nous avons crible l'activite anti-oxydante de 100 extraits methanoliques aqueux de plantes en utilisant le systeme reactif de Fenton/linoleate, et leur activite de piege a radicaux libres en utilisant le systeme generateur de radicaux libres au 1,1-diphenyl-2-picryl-hydrazyle. Les resultats suggerent que 14 plantes - Alpinia officinarum, Areca catechu, Brassica alba, Cannabis sativa, Curcuma longa, Curcuma aromatica, Eugenia caryophyllata, Evodia officinalis, Paeonia suffruticosa, Rhaphanus sativus, Rheum palmatum, Rhus verniciflua, Trapa bispinosa, Zanthoxylum piperitum - peuvent etre des sources potentielles d'anti-oxydants. Huit plantes - Citrus aurantium, Cornus officinalis, Gleditsia japonica, Lindera strychnifolia, Phragmites communis, Prunus mume, Schizandra chinensis, Terminalia chebula - peuvent etre la source potentielle de pieges a radicaux libres a partir de plantes naturelles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1467-2494.1997.tb00194.x
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  • 8
    Electronic Resource
    Electronic Resource
    Biological screening of 100 plant extracts for cosmetic use (I): inhibitory activities of tyrosinase and DOPA auto-oxidation (1997)
    Oxford, UK : Chapman and Hall
    International journal of cosmetic science 19 (1997), S. 0 
    Details
    ISSN: 1468-2494
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The aim of this study was to evaluate several plant extracts with a view to developing melanogenesis inhibitors. In this study, 100 plant extracts were screened to elucidate their whitening effects using in vitro inhibition of tyrosinase and DOPA auto-oxidation activity. Several plant extracts such as Chaenomeles speciosa, Dryopteris crassirhizoma, Gastrodia ellata, Glycyrrhiza glabra, Morus alba, Myristica fragrans, Rheum palmatum and Sophora japonica showed inhibition of mushroom tyrosinase activity. Plant extracts including Bupleurum falcatum, Caragana sinica, Morus alba and Tussilago farfara showed inhibition of DOPA auto-oxidation activity. L'objet de cette etude etait d'evaluer plusieurs extraits vegetaux dans le but de developper des inhibiteurs de la melanogenese. Dans cette etude, on a crible 100 extraits vegetaux pour connaitre leurs effets blanchissants en utilisant in vitro l'inhibition de la tyrosinase et de l'activite auto-oxydante de la DOPA. Plusieurs extraits vegetaux tels que Chaenomeles speciosa, Dryopteris crassirhizoma, Gastrodia ellata, Glycyrrhiza glabra, Morus alba, Myristica fragrans, Rheum palmatum et Sophora japonica presentent une activite d'inhibition de la tyrosinase du champignon. Des extraits vegetaux comprenant Bupleurum falcatum, Caragana sinica, Morus alba et Tussilago farfara montrent une inhibition de l'activite d'auto-oxydation de la DOPA.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1467-2494.1997.tb00193.x
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  • 9
    Electronic Resource
    Electronic Resource
    Measurements of cross section and charge asymmetry for e^+e^- -〉 μ^+μ^- and e^+e^- -〉 τ^+τ^- at s = 57.8 GeV
    Amsterdam : Elsevier
    Physics Letters B 331 (1994), S. 227-235 
    Details
    ISSN: 0370-2693
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0370-2693(94)90967-9
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  • 10
    Electronic Resource
    Electronic Resource
    Comparison of hadronic shower punchthrough and TeV muon dE/dx with calculation
    Amsterdam : Elsevier
    Nuclear Physics B (Proceedings Supplements) 23 (1991), S. 37-44 
    Details
    ISSN: 0920-5632
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0920-5632(91)90029-E
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