ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Modeling of Laser Dressing for Metal-Bond Diamond Grinding Wheel (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 329 (Jan. 2007), p. 145-150 
    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: Laser processing of super-abrasive grinding wheel is paying a role in a truing/dressingtechnique to complement mechanical methods recently. However, normal dressing/truing is difficultowing to the toughness of metal-bond materials and high hardness of diamond abrasive. Bothgeometric and mathematic models were developed to improve laser processing quality and predictvarious processing parameters, such as focal offset, and incident power, and power density toperform material removal during laser processing a metal-bond diamond grinding wheel. Varioustrends of the geometrical features of dressing zone in terms of the varying focal offsets wereanalyzed. Discussions were also given on dressing-zone geometry control. Experimental studieswere carried out using different processing parameters to test the effects of laser poweres ondressing quality. Further grinding-force measurement determined the laser dressing parameters withrespect to the wheel surface conditions. The normal force FN reduces up to 20%, while tangentialforce FT decreases to 7% too.The outcomes were shown well agreement with predicted results
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.329.145.pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Prediction of Surface Quality and Parameter in Bearing Convex Raceway Finishing (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 24-25 (Sept. 2007), p. 361-370 
    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: Electrochemical abrasive belt grinding (ECABG) technology, which has the advantageover conventional stone super-finishing, has been applied in bearing raceway super-finishing.However, the finishing effect of ECABG is dominated by many factors, which relationship is socomplicated that appears non-linear behavior. Therefore, it is difficult to predict the finishing resultsand select the processing parameters in ECABG. In this paper, Back-Propagation (BP) neuralnetwork is proposed to solve this problem. The non-linear relationship of machining parameters wasestablished based on the experimental data by applying one-hidden layer BP neural networks. Thecomparison between the calculated results of the BP neural network and experimental results underthe corresponding conditions was carried out, and the results indicates that it is feasible to apply BPneural network in determining the processing parameters and forecasting the surface quality effectsin ECABG
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/39/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.24-25.361.pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Fatigue Reliability Evaluation of Old Steel Bridges Based on Probabilistic Fracture Mechanics (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 324-325 (Nov. 2006), p. 435-438 
    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: There are many old steel bridges on Chinese transportation lines, which keep their normaltraffic service function. The old bridges are often required to carry an increasing volume of traffic andheavier vehicles than the original design, so bridge management departments pay more attention tothe actual remaining fatigue life of such structures. Based on probabilistic fracture mechanics theory,the member and the system fatigue failure evaluation models for old steel bridges are all proposed,and the fatigue reliability analysis program is developed using Monte-Carlo. As a case study, theevaluation models are used to predicate the fatigue reliability of Zhejiang Street Bridge. According toevaluation results, the probabilistic remaining fatigue life, safe inspection intervals and maintenancestrategy are determined
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.324-325.435.pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Low Temperature Superplasticity of Fine-Grained Magnesium Alloy AZ31 (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 15-17 (Feb. 2006), p. 467-472 
    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: Low temperature superplasticity (LTSP) was studied in a fine-grained magnesium alloyAZ31 which was processed by multi-directional forging (MDF) under decreasing temperatureconditions. Tensile specimens were cut from MDFed Mg alloy parallel to the final compressionaxis (CA), and the tensile axis perpendicular to the CA. Tensile tests was carried out attemperatures from 393K to 473K and at various strain rates. Superplasticity appears even at a lowtemperature of 393K with a stress exponent (n) of about 0.56 and a total elongation of 370%. Therelative large stress exponent can be connected with grain coarsening taking place duringdeformation. The initial texture hardly takes place during deformation. This suggests that grainrotation does not occur during superplasticcity
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/39/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.15-17.467.pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Nano-Structures Fabrication by Laser Combined with Near-Field Scanning Optical Microscopy (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 329 (Jan. 2007), p. 415-420 
    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: We have developed the laser nanoprocessing technique by the integration of the fs laserand near-field scanning microscopy (NSOM). The second harmonic femtosecond laser working inthe optical near-field with the assistance of NSOM equipment was applied to expose thephotosensitive polymer material. The nanopatterns with feature size smaller than the laserwavelength can be fabricated. The optical diffraction limitation is therefore broken through by thenear-field nanoprocessing. It was found in our experiment that the nanofabrication feature sizedepends strongly on the gap between the fiber probe tip and the substrate surface, as well as thelaser coupling efficiency. The approach offers the advantages of high precision, speed andselectivity in nanopatterning, and is promising to be used in data storage device manufacture forhigher density recording
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.329.415.pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Laser Truing and Dressing of Small Vitrified CBN Grinding Wheel (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 329 (Jan. 2007), p. 163-168 
    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: This paper aims at the development of an alterative technique for truing and dressing asmall vitrified CBN grinding wheel used for the internal finishing of small holes measuring severalmillimeters in diameter. In conventional truing and dressing, a single-tip diamond dresser or a rotaryGC cup wheel dresser is employed. This levels off the improvement in the wheel truing accuracybecause the stiffness of the grinding wheel shaft with an open-sided structure is low, and the shaft isthus deformed easily due to the truing force. In the present work, a new truing and dressing techniqueis proposed in which a Nd:YAG laser beam is employed as the dresser. Experiments were carried outwith respect to the effects of the laser beam conditions (amplitude, width and frequency of pulse, andfocus offset) and the relative motion between the laser beam and CBN wheel. It was found that therun-out of the CBN wheel was decreased significantly, and the wheel surface condition was improvedgreatly after laser truing and dressing
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.329.163.pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Study on Anodic Smoothening Velocity in Electrochemical Abrasive Lapping (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 329 (Jan. 2007), p. 297-302 
    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: By analysing the change of the anodic surface topography in Electrochemical AbrasiveLapping (ECAL), the influence of the lapping action and the electrochemical action on the anodicsmoothening velocity is studied. In electrochemical finishing, the micro-peaks on the anodic surfacecould be smoothened quickly by electrochemical action and the surface topography presents theprofile wave, but in ECAL, the profile wave after electrochemical action could be divided intomicro-peaks renewedly by lapping action and the alternation of electrochemical action and lappingaction makes the surface topography before electrochemical action present profile micro-peaks,which will increase the anodic smoothening velocity. The influence of machining parameters, such asabrasive grain sizes, tool’s pressure, abrasive content, frictional velocity and current density etc, onthe anodic smoothening velocity is discussed in detailed
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.329.297.pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Strain-Induced Grain Refinement in Magnesium Alloy AZ31 during Hot Forging (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 503-504 (Jan. 2006), p. 521-526 
    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: Strain-induced grain refinement in a magnesium alloy AZ31 was studied in multi-directional forging (MDF) at a temperature range from 423K to 623K and at a strain rate of 3x10-3s-1. MDF with a pass strain of 0.8 was carried out to high cumulative strains of around 5 with changing of the loading direction during decreasing temperature from pass to pass. The structural changes can be characterized by the evolution of many mutually crossing kink bands at low strains followed by increase in their number and misorientation, finally resulting in a fully developed fine-grains at high strains. MDF with decreasing temperature can accelerate the evolution of much finer grains and the improvement of plastic workability. An average grain size of 0.3 μm is formed at an accumulative strain of 4.8 and at 423K. It is concluded that grain refinement under MDF conditions occurs by a series of deformation-induced continuous reactions; that is essentially similar to continuous dynamic recrystallization (cDRX)
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/11/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.503-504.521.pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    The Effects of Rare Earth Elements on Corrosion Resistance of Sol-Gel Coatings for 2024 Aluminum Alloy (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 546-549 (May 2007), p. 1801-1804 
    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: Rare-earth modified coatings on 2024 aluminum alloy were prepared by sol-gel methods,aiming at improving the corrosion resistance with the environmental friendly features. Theinvestigation put emphases on the effects of rare-earth additives on corrosion resistance andmicrostructure of sol-gel coatings. The results revealed that coated samples containing 2g·L-1rare-earth not only delayed the incubation period of corrosion, but also hindered the development ofit, and their corrosion rate decreased 80.3% compared with the bare ones and was 15.9% than therare-earth free coated ones. The action of rare-earth on morphology and microstructure of sol-gelcoatings for 2024 Al alloy was studied by SEM. High density good cohesion, and intact coveragewere showed clearly ,which provided a reliable proof of the reformative effects of rare-earthadditives
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/16/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.546-549.1801.pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Laser Fabrication of Low Resistivity Electrode on Glass (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 532-533 (Dec. 2006), p. 345-348 
    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 method for low resistivity resistor on transparent substrate with laser induced plasmaassisted by ablation and laser annealing was described. The diffusion distribution for metallizationwas measured with XPS. The surface profile was analysed with SEM. The minimum resistivity wegot was 0.1 [removed info]/Sq. It demonstrates that the electronic thin film obtained has a very good conductivity.The most important factors for forming electrically conducting films on the transparent substrate arelaser fluence, beam scanning and pulse repetition rate. This technology will be useful in thefabrication of LCD electrode, glass defused resistor and circuit on glass
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/14/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.532-533.345.pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...