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  • 1
    Digitale Medien
    Digitale Medien
    Flow Stress and Microstructural Evolution of AM50 Alloy during Upsetting Forging Tests at High Temperature (2005)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 488-489 (July 2005), p. 815-818 
    Details
    ISSN: 1662-9752
    Quelle: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Thema: Maschinenbau
    Notizen: Flow stress and microstructures evolution of AM50 alloy during upsetting forging tests were investigated in this paper. In upsetting forging deformation, cylindrical billets of AM50 alloy as-cast were compressed in the temperature range of 250°C to 350°C and strain rate range of 1.1×10-3s-1 to 2.8×10-2s-1. Under the deformed conditions, the true stress-true strain curves indicated that the true stress increased quickly at the initial time, then stayed at certain value for a short duration and increased continuously at lower temperature and high strain rate. It should be noted that the true stress kept the dynamic balance with the true strain at higher temperature and lower strain rate that the true stress obeyed the regulation as the same as the ordinary materials. The peak stress at all conditions increased with the strain rate increasing and the forging temperature decreasing. A great many recrystallized grains and dislocations were observed in the deformed specimens of AM50 alloy. The grain size of the deformed specimens decreased with decreasingforging temperature and increasing the deformation
    Materialart: Digitale Medien
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/10/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.488-489.815.pdf
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  • 2
    Digitale Medien
    Digitale Medien
    Microstructures, Tensile Properties and Forming Process of AZ31 Alloy Sheets (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 546-549 (May 2007), p. 241-244 
    Details
    ISSN: 1662-9752
    Quelle: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Thema: Maschinenbau
    Notizen: Rolling and punching techniques of AZ31 alloy were investigated in this paper. Variousrolling experiments were carried out to make fine-grained Mg sheets. Punching tests were conductedat the temperatures range from 70 to 300 oC. The analysis revealed that there existed an excellentwarm forming temperature for as-rolled AZ31 alloy. A warm deep punching tool setup using heatingelements was designed and manufactured to produce the cell phone. Microstructures were observedusing optical and scanning electron microscope equipped with EBSD. The textures in as-rolled andas-annealed specimens attribute to different mechanical properties along the various direction
    Materialart: Digitale Medien
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/16/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.546-549.241.pdf
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