Search Results - "Buhrig, A."

The Influence of Surface Roughness on Freckle Formation in Directionally Solidified Superalloy Samples by Ma, Dexin, Bührig-Polaczek, A.

“…A series of directional solidification experiments with superalloy CMSX-4 was carried out with various surface profiles. The results obtained clearly…”
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Fabrication of Micropatterned Surfaces by Improved Investment Casting by Schmitz, G. J., Grohn, M., Bührig-Polaczek, A.

“…A defined surface texture in the sense of geometrically, relief‐like functionalized surfaces of macroscopic investment castings has not been subject of…”
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Description of component distortion in aluminum gravity die casting as a result of hindered shrinkage and evaluation of numerical predictions by Wolff, N., Gor, S., Vroomen, U., Bührig‐Polaczek, A.

“…Abstract Deviation from the nominal dimension in the sense of component distortion is a quality‐reducing phenomenon in the foundry. This distortion problem as…”
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A high thermal gradient directional solidification method for growing superalloy single crystals by Wang, F., Ma, D.X., Zhang, J., Bogner, S., Bührig-Polaczek, A.

“…The experiments here were conducted at withdrawal rates of 3mm/min and 1mm/min using a CMSX-6 and a CMSX-4 superalloy, respectively. The process was assessed…”
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Application of a Heat Conductor Technique in the Production of Single-Crystal Turbine Blades by Ma, Dexin, Bührig-Polaczek, A.

“…The heat conductor (HC) technique was applied in the production of single-crystal turbine blades with the aim of reducing grain defects originating from a…”
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ADI Lost-Foam: Synergy of Process and Material by dos Santos, D., Vroomen, U., Bührig-Polaczek, A.

“…A consortium of SME and RTD partners from Germany, Poland, Italy and Finland was established in the ambit of the fifth European framework programme for the…”
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Physico-chemical causes of the formation of chunky graphite in austenitic ductile iron by Pustal, B., Bührig-Polaczek, A.

“…Chunky graphite (CHG) is a well-known phenomenon which occurs in heavy section spheroidal graphite iron (SGI) castings or SGI castings with higher alloying…”
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Comparative investigations into microstructural and mechanical properties of as‐cast and laser powder bed fusion (LPBF) fabricated duplex steel (1.4517) by Raffeis, I., Vroomen, U., Adjei‐Kyeremeh, F., Großmann, D., Hammelrath, H., Westhoff, E., Bremen, S., Boscolo Bozza, D., Bührig‐Polaczek, A.

“…A methodology is presented that compares the microstructural and mechanical properties of as‐cast and additive‐made ferritic‐austenitic duplex steel 1.4517…”
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Influence of convection and grain movement on globular equiaxed solidification by Wu, Menghuai, Ludwig, Andreas, Bührig-Polaczek, Andreas, Fehlbier, Martin, Sahm, Peter R.

“…A two-phase volume averaging model was used to study convection and grain movement, and their influence on the globular equiaxed solidification. Both liquid…”
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Mechanical Properties and Impact Toughness of Molybdenum Alloyed Ductile Iron by Franzen, D., Pustal, B., Bührig-Polaczek, A.

“…Grades of high silicon ductile iron offer excellent combinations of static strength and ductility as well as good machinability due to their fully ferritic,…”
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Determination of the solid-liquid interface energy in the Al-Cu-Ag system by BULLA, A, CARRENO-BODENSIEK, C, PUSTAL, B, BERGER, R, BÜHRIG-POLACZEK, A, LUDWIG, A

“…The solid-liquid interface energy, σ^sub SL^, is of major importance during phase transformation. It has a strong influence on solidification morphologies and…”
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Heat Transfer Coefficient Determination in a Gravity Die Casting Process with Local Air Gap Formation and Contact Pressure Using Experimental Evaluation and Numerical Simulation by Vossel, T., Wolff, N., Pustal, B., Bührig-Polaczek, A., Ahmadein, M.

“…Anticipating the processes and parameters involved for accomplishing a sound metal casting requires an in-depth understanding of the underlying behaviors…”
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Grain Nucleation Parameters for Aluminum Alloys: Experimental Determination and Model Validation by Ahmadein, M., Pustal, B., Berger, R., Subašić, E., Bührig-Polaczek, A.

“…A statistical grain nucleation model was implemented as a part of a multiphase flow and solidification simulation code for metallic alloys. Three…”
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Effect of Ceramic Cores on the Freckle Formation During Casting Ni-Based Single Crystal Superalloys by Wang, F., Ma, D. X., Bührig-Polaczek, A.

“…A directional solidification experiment was carried out using CMSX-4 superalloy to investigate the effect of the ceramic core on the freckle formation. The…”
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Biomimetic cellular metals-using hierarchical structuring for energy absorption by Bührig-Polaczek, A, Fleck, C, Speck, T, Schüler, P, Fischer, S F, Caliaro, M, Thielen, M

“…Fruit walls as well as nut and seed shells typically perform a multitude of functions. One of the biologically most important functions consists in the direct…”
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Casting of a cold work steel alloy in semi-solid state by Bramann, H., Fehlbier, M., Sahm, P.R., Bührig-Polaczek, A.

“…Semi-solid processing of metallic materials has already been investigated for some time, however, this innovative production process has not fully established…”
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Evaluating the Application of Heating Conductor Surfaces Inside Plasma Sprayed Coatings in Permanent Mold Metal Casting Processes for Local, Near-Surface Heat Release by Vossel, T., Gor, S., Pustal, B., Bührig-Polaczek, A.

“…With casting being a complex process which involves several physical effects and interactions, a wide array of means for influencing such processes exist…”
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Thixocasting Steel Hand Tools using Al2O3-coated Steel and Molybdenum Dies by Bünck, M., Subasic, E., Bührig-Polaczek, A., Jiang, K., Münstermann, S., Schneider, J. M., Fickert, K., Günther, H.-J.

“…Forging is state‐of‐the‐art for producing hand tools on an industrial scale. Due to high demands on the stiffness and the fracture toughness, high‐strength…”
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Modeling the Porosity Formation in Austenitic SGI Castings by Using a Physics-Based Material Model by Pustal, B., Hallstedt, B., Schäfer, W., Bartels, C., Subasic, E., Siebert, H., Schneider, J. M., Bührig-Polaczek, A.

“…On solidification, microsegregations build up in solid phases due to changes in solid concentrations with temperature. Diffusion, which is a kinetic process,…”
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Influence of the casting and mould temperatures on the (micro)structure and compression behaviour of investment-cast open-pore aluminium foams by Fischer, S.F., Schüler, P., Fleck, C., Bührig-Polaczek, A.

“…Current literature offers only limited information about the influence of the casting and mould temperatures on the properties of cast aluminium foams. In…”
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