ISSN:
1662-9779
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Physics
Notes:
This paper illustrates several research activities being carried out within the Center of Competencefor Casting and Thixoforging Stuttgart (CCT `NOVUS´).A new method for manufacturing Metal Matrix Composites out of the semi-solid state has beendeveloped at the Institute for Metal Forming Technology, Universitaet Stuttgart, and applied forpatent pending. Within this new manufacturing method for the production of fibre and particlereinforced composites now disadvantages of liquid-phase-techniques can be reduced in combinationwith decreased manufacturing costs compared to conventional MMC-production technologies dueto short cycle times and the ability of near-net-shape forming.It is obvious that manufacturing process in the fabrication of metal matrix composite materials willinfluence in some extent the performance of these materials. A current research project at theInstitute for Metal Forming Technology (IFU), contributes implementing specific boundarycondition of the manufacturing process to numerical analysis. Such boundary conditions exert directinfluence on product quality. For manufacturing of metal matrix composites limiting factors are e.g.temperature, pressure, deformation, etc. Detecting input-parameter for numerical analysis basicrheological parameters, such as static and dynamic yield points, hysteresis and shear rate jump tests,detection of the differential structural parameter, evolution of apparent viscosity of different castalloysare topics of current research project at the Institue for Metal Forming Technology.For reheating-process of semi-solid alloys new technologies have been developed and applied forpatent pending by the Institute for Control Engineering of Machine Tools and Manufacturing Units(ISW). The two main advantages of this technique as compared with other induction heatingtechniques are the direct online determination of liquid-, solid fraction and heating-homogeneity aswell as robustness against variations of prematerial (chemical composition, billet-diameter, etc.)
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/24/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.141-143.109.pdf
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