Library

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
    Characterization of Mushy Zone of ZWx2 (x=2, 4, 6) Magnesium Alloys (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 141-143 (July 2008), p. 581-585 
    Details
    ISSN: 1662-9779
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Notes: The potentials of Mg-Al system alloys for semi-solid forming have been extensivelyevaluated these years. In the present studies, mushy zone properties of the Mg-Zn system alloys, i.e.ZWx2 (x=2, 4, 6), are characterized and analyzed by using cooling curve thermal analysis method andcontinuous torque measurement technique. The results show that Tn1 (first characteristic temperatureof primary crystal nucleation), Tn2 (second characteristic temperature of primary crystal nucleation)and Tch (temperature of dendritic coherency) decrease with the increasing of zinc content, and thetemperature difference of (Tn1-Tn2) almost remains constant, while the temperature difference of(Tn2-Tch) changes dramatically when Zn content increases to 6wt.%; The results also show that the fs-cc(solid fraction of dendritic coherency) of ZWx2 alloys ranges from 0.4 to 0.51 while ZW22 andZW62 alloys having higher fs-ch and ZW42 alloy having the lowest fs-ch; also, strength of alloys inmushy zone does not develop until a certain fraction solid( corresponding to the dendrite coherencypoint) is reached. The results obtained by cooling curve thermal analysis method and continuoustorque measurement techniques are comparable to each other
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/24/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.141-143.581.pdf
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    C-Doped TiO〈sub〉2〈/sub〉 with Visible Light Photocatalytic Activity (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 121-123 (Mar. 2007), p. 939-942 
    Details
    ISSN: 1662-9779
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Notes: Carbon doped titanium dioxide photocatalysts have been synthesized by a precipitation method.Anatase TiO2 was obtained when the precipitate was heat-treated at 400℃ when rutile phaseappeared at 600℃. The absorption spectra of the powders showed strong absorption in visibleregion. For the sample calcined at 400 ℃ , the absorption extended up to 750nm. X-rayphotoelectron spectrum (XPS) confirmed that carbon atoms were incorporated into the TiO2 crystallattice. Photodegradation experiments showed that the powders had visible-light degradationactivity
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/23/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.121-123.939.pdf
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Stress Corrosion Cracking of NiTi Orthodontic Wires in Sodium Fluoride Solution (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 32 (Feb. 2008), p. 79-82 
    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 influence of fluoride on stress corrosion cracking (SCC) of NiTi orthodontic wireswas investigated using slow strain rate test (SSRT) and scanning electron microscopy (SEM). Theresults indicated that fluoride significantly accelerated the stress corrosion cracking of NiTiorthodontic wires. The fractographies of NiTi orthodontic wires exhibited striation pattern
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.32.79.pdf
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Fatigue Behaviour of Ti-6Al-4V Alloy in Vacuum and at Low Temperature (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 41-42 (Apr. 2008), p. 83-90 
    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: Investigations have been conducted on the fatigue behavior of Ti-6Al-4V alloy with thebimodal microstructure in air at room temperature, in vacuum at room temperature and in vacuumat low temperature (100K), respectively. The results show that the fatigue life of this alloy is longerin vacuum and/or at low temperature than that in air at room temperature. The combination ofvacuum and low temperature can much improve the fatigue properties of this alloy because of theirpurifying effect on fatigue cracks propagation. SEM observation of fatigue fracture surfaceindicates that all the fatigue cracks initiate in the sample surface when Nf ≦106 cycles. The abovethree testing conditions lead to different modes of fatigue crack propagation and therefore muchdifferent morphology of fatigue fracture
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.41-42.83.pdf
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Semisolid Microstructural Evolution of Equal Channel Angular Extruded Mg-Al Alloy During Partial Remelting (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 141-143 (July 2008), p. 557-562 
    Details
    ISSN: 1662-9779
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Notes: Using equal channel angular extrusion (ECAE) process, which combine the advantages ofgrain refinement and induced strain, for preparing semisolid billets is a relatively new Strain InducedMelt Activation(SIMA)method. This paper investigates the remelting and semisolid isothermalholding behavior of Mg-9Al alloy after ECAE processing at 350ºC. It has been found that 2 passesECAE-ed billets are qualified for obtaining spherical grains after remelting and isothermal holdingtreatment. Increasing the ECAE process from 2 passes to 8 passes has no further significant effects onthe size and roundness of the solid particles at the semisolid state. The effects of temperature andisothermal holding time on microstructural evolution have also been investigated. In addition, thesolid solution treatment before the ECAE processing affected greatly on microstructural evolution ofthe alloy during ECAE processing and thus the following remelting and isothermal holding behavior.The Mg17Al12 precipitates were uniformly decomposed from the saturated solid solution in thesolutionized samples during ECAE processing. The coalescence of grains together with theself-blocking effect generated more entrapped liquid in the solutionized sample at semisolid state.Moreover, the solid particles of solutionized samples have bigger size and grow faster, which aredetrimental to SSM processability
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/24/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.141-143.557.pdf
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Effect of Nd on Microstructures and Properties of AZ31 Wrought Mg Alloy (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 546-549 (May 2007), p. 301-304 
    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: Addition of RE elements to Al-containing Mg alloys can improve properties of Mg alloysat elevated temperatures. In the present investigation, hot-extruded AZ31+x%Nd.(x=0.1,0.3,0.6and1.0 wt%) wrought Mg alloy were prepared .The effects of Nd on microstructuresand mechanical properties at room temperature of new alloy were investigated. The investigationfound that Nd can bring about two kind of precipitation phases . One is AlNd phase, the other isAlNdMn phase, which were identified as Al11Nd3 and Al8NdMn4 by X-ray diffraction and TEM
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/16/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.546-549.301.pdf
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Characteristics of Acoustic Emission during Fatigue of As-Rolled AZ31B Magnesium Alloy (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 546-549 (May 2007), p. 579-584 
    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: The acoustic emission (AE) detected during the fatigue process in an as-rolled magnesiumalloy AZ31B was analyzed. Measurements were made during fatigue in air as well as in aqueous 0.1%NaCl solution. Three stages of fatigue were detected with AE. It is concluded that plasticity, crackextension or friction was the main AE sources during fatigue
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/16/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.546-549.579.pdf
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Effect of Aging on Electrochemical Behavior of T6-Treated WE54 Mg Alloy (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 546-549 (May 2007), p. 533-536 
    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: Microstructural examinations of T6-treated WE54 magnesium alloy were conducted afterdifferent aging conditions, and the influence of aging on electrochemical behavior of this alloy wasinvestigated. For three batches of samples, with increasing aging time, the amount of precipitatephases was greatly promoted, and they formed in a strengthening continuous way. Electrochemicalstudy showed that the value of corrosion potential followed the tendency to decrease when the agingcondition transformed from under-aged to peak-aged. However, after peak-aging, the corrosionpotential was raised to higher values. Explanations for the observed phenomena were based on therelationship between microstructure, especially precipitate phases, and electrochemical behavior. Atunder-aged condition, matrix served as galvanic cathode and precipitates acted as galvanic anode.Because the amount of precipitate would rise with prolonging aging time, it is natural that corrosionpotential decreased. For over-aged alloys, metastable precipitate phases might in situ change toequilibrium phases, rendering increase of corrosion potential possible
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/16/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.546-549.533.pdf
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Development of a High Strength Mg-Zn-Y-Zr Wrought Alloy (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 539-543 (Mar. 2007), p. 1701-1706 
    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: The effects of Y addition to the Mg-Zn-Y-Zr alloy on the change of the microstructureand the mechanical properties (with the Y content range of 1 to 3 wt%) have been investigated. Itshows that when Zn content is constant (5.65wt%), the alloys with Y content between 1.17 and1.72wt% nearly reach its highest strength. With the composition near the optimums, the extrudedMg-6%Zn-1%Y-Zr alloy shows high strength and excellent ductility. The deformation behavior ofthis new alloy at high temperature has also been studied. Moreover, the super-long fatiguebehavior of the Mg-6%Zn-1%Y-Zr alloy has also been tested, the results show the alloy with ahigh fatigue strength of about 85-90MPa in the super-long fatigue life regime of 1×109 cycles
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/15/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.539-543.1701.pdf
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Comparison of Coating Properties by Two Pulse Modes on Magnesium Alloy (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 546-549 (May 2007), p. 585-588 
    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: Micro arc oxidation is an effective method to improve corrosion resistance of magnesiumalloys and the selected electric parameters have great effects on coating properties. In this paper, theeffects of the unipolar pulse and the bipolar pulse on surface morphology, chemical compositions andcorrosion resistance were studied. When working voltage was higher than breakdown voltage, sparksappeared on sample surface whether the unipolar pulse or the bipolar pulse was used. However, underthe same positive working voltage, the spark size and lifetime obtained by the bipolar pulse wereevidently larger and longer than those by the unipolar pulse, which resulted in rougher anodic coatingsand worse corrosion resistance by the former than the latter
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/16/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.546-549.585.pdf
    Library Location Call Number Volume/Issue/Year 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...