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  • Electronic Resource  (15)
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  • Electronic Resource  (15)
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  • 11
    Electronic Resource
    Electronic Resource
    Effect of Initial Texture on the Deformed Microstructure of IF Steel (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 558-559 (Oct. 2007), p. 1395-1400 
    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 development of deformation texture and microstructure was examined for fourdifferent initial textures. IF steel sheets with a majority of α-, ε-, and γ-fiber and near random texturewere prepared and cold rolled. The specimens exhibited characteristic behaviors in rolling textureevolution and deformation-induced misorientation development, according to their initial textures,especially at small strain levels. Due to the orientation dependence of intra-granular misorientationaccumulation, the different texture evolutions affected the induced misorientation distribution. Alarger fraction of γ-fiber orientations was related to more prominent misorientation development,while the initial texture stability simultaneously affected the misorientation development. Theunstable, initial ε-fiber texture showed a stronger tendency of misorientation accumulation than thestable α-fiber during the subsequent cold rolling
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/17/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.558-559.1395.pdf
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    Paper (German National Licenses)
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  • 12
    Electronic Resource
    Electronic Resource
    Grain Boundary Precipitation and Tensile Ductility of Fe-Mn-Ni Alloys (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 539-543 (Mar. 2007), p. 1595-1600 
    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 mechanism of grain boundary embrittlement and the improvement of the tensileductility afforded by alloy addition or heat treatment was investigated in an Fe-Mn-Ni alloy. Theprecipitation of θ-MnNi intermetallic particles was observed at the prior austenite or interlathboundaries during the aging treatment and this was believed to be responsible for the grainboundary embrittlement of these alloys. After prolonged aging or aging at higher temperaturesabove 520°C, these metastable intermetallic particles were transformed into the thermodynamicallystable austenite phase, thereby leading to the recovery of the grain boundary strength. The additionof Mo caused the grain boundary precipitate to be changed to austenite and resulted in a significantimprovement in the tensile ductility after aging
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/15/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.539-543.1595.pdf
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    Paper (German National Licenses)
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  • 13
    Electronic Resource
    Electronic Resource
    The Effect of Alloy Addition on the High Temperature Properties of Over-Aged Al-Si(CuNiMg) Cast Alloys (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 519-521 (July 2006), p. 461-466 
    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 role of alloying elements in the improvement of the high temperaturestrength of Al-12Si(CuNiMg) cast alloys used for automotive piston applications wasinvestigated. The addition of alloying elements such as Mn, Cr, Ti and Ge was studiedand the detailed characterization of the composition and morphology of theconstituent phases after over aging at 350[removed info] for 1000 hrs was performed. Thecompositions and volume fractions of the equilibrium phases determined bythermodynamic calculation were compared with the experimental results. Theaddition of transition elements, including Mn, Cr and Ti, increased the volumefraction of the intermetallic phases, which effectively enhanced the high temperaturestrength of the alloys. Among these transition elements, Mn turned out to be the mosteffective alloying element. After adding up to 0.5wt% of Mn, a large number ofintermetallic phases, α-Al(Mn,Fe)Si as well as fine Al6(Mn,Fe) particles wereprecipitated and a significant improvement in the elevated temperature properties wasachieved. The addition of Ge promoted the precipitation of the θ[removed info]phase (metastablephase, θ-Al2Cu), due to the formation of GeSi precipitates, thereby improved themechanical properties of the alloy after T6 heat treatment. However, the presence ofthese GeSi precipitates did not affect the coarsening of the θ[removed info] phase to form Qphase(Al5Cu2Mg8Si6) during aging and, thus, the elevated temperature properties werenot improved by the addition of Ge
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/13/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.519-521.461.pdf
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  • 14
    Electronic Resource
    Electronic Resource
    Microtexture Measurement of Copper Damascene Line with EBSD (2002)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 408-412 (Aug. 2002), p. 529-534 
    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
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/06/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.408-412.529.pdf
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  • 15
    Electronic Resource
    Electronic Resource
    Orientation Spread in Deformed Grains and Its Relevance to Recrystallization Texture Development in IF Steels (2004)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 467-470 (Oct. 2004), p. 69-74 
    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: Deformation characteristics of cold rolled grains and their contribution to the development of recrystallization texture in IF steel were investigated using EBSD. Quantitative evaluation of the intra-granular orientation spread in the deformed grains was attempted. Both of the GAM and SGS could represent the orientation spread but in different manner. The GAM value was higher in {111}//ND orientations than in other orientation groups implying steep orientation gradient withinshort ranges in {111}//ND oriented grains. This steep orientation gradient was generally originated from the existence of deformation heterogeneities. Particularly, {111}〈112〉 orientation which was the dominant component in the recrystallization texture showed the maximum values of both GAM and SGS, which was caused by the frequent development of shear bands. SGS values of {001}//ND oriented soft grains were unexpectedly large in spite of their small GAM values. It could be confirmed that their uniform deformation behavior led to the gentle but monotonous orientation gradient in long ranges. The lowest values of both GAM and SGS were obtained in the {112}〈110〉 orientation, probably, because of the highest orientation stability in that orientation during plain strain deformation condition. GAM was more closely related to the development of recrystallization texture and the significance of the steep orientation gradient in the recrystallization behavior should be re-addressed
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/09/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.467-470.69.pdf
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