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  • 1
    Electronic Resource
    Electronic Resource
    Evaluation for Toughness Degradation of 2.25Cr-1Mo Steel Using Magnetic Property Measurement Method (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 321-323 (Oct. 2006), p. 522-527 
    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: Many researchers have been interested in the nondestructive measurement methods forexamining the microstructural changes and components damage in order to assure the safe operationof steel structure. It has been recognized that the techniques based on magnetic measurement offereda great potential because of high susceptibility to the change of several metallurgical factors. In thisstudy, the effect of isothermal heat treatments, which simulate the microstructural changes observedin reactor vessel material at the service temperature, on the magnetic properties was investigated.2.25Cr-1Mo steel specimens with several different kinds of aging were prepared by an isothermalheat treatment at three different temperature levels. Magnetic property such as coercive force wasmeasured. The coercive force at room temperature monotonously increased with the extent ofdegradation of the material. The correlation between the measured magnetic property and themechanical properties was studied. In addition, the applicability of magnetic properties measurementsto the evaluation for toughness degradation of reactor vessel was discussed
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/51/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.321-323.522.pdf
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  • 2
    Electronic Resource
    Electronic Resource
    A Study on Fatigue Properties of Sc Added Al 2519 Alloy (2005)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 297-300 (Nov. 2005), p. 2483-2488 
    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 high cycle fatigue properties of two kinds of wrought Al 2519 alloys without and with scandium of 0.10% were investigated. The fatigue strength was determined at R = 0.1 under constant amplitude loading conditions in air. The alloy with scandium of 0.10% showed a little lower tensile yield strength and higher fatigue strength values. The fine grained Al-0.10Sc alloy exhibited a higher resistance against fatigue crack nucleation despite the lower yield stress in comparison to the coarsegrained Al 2519 alloy. The results can be explained mainly with the microstructural differences between both alloys. This results are due to the presence of coherent Al3 (Sc, Zr) precipitates and a very fine subgrain structure
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/50/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.297-300.2483.pdf
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  • 3
    Electronic Resource
    Electronic Resource
    A Study on Fatigue Properties of Sc and Zr Added Al Alloy (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 345-346 (Aug. 2007), p. 657-660 
    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: Al alloy is used extensively in several fields because specific strength is good andworkability is superior. It is known that If Sc is added to Al alloy, strength is increased andre-crystallization temperature rises because microstructure becomes fine. The high cycle fatigueproperties of four kinds of Al-Mg-Si alloys without and with only scandium of 0.20 % or with bothscandium(Sc) of 0.20 % and zirconium(Zr) of 0.12% were investigated. The fatigue strength wasdetermined at R = -1.0 under constant amplitude loading conditions in air. The alloy with scandium of0.20 % showed a little higher fatigue strength values. The alloy with 0.20 % Sc and 0.12 % Zr showedhighest tensile yield strength and highest fatigue strength. The fine grained Al 6061+0.20Sc+0.12Zralloy exhibited a higher resistance against fatigue crack nucleation in comparison to the coarsegrained Al 6061 alloy. The results can be explained mainly with the micro-structural differencesamong four alloys. This results are due to the presence of coherent Al3 (Sc, Zr) precipitates and a veryfine sub-grain structure
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/54/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.345-346.657.pdf
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