Prof. Dr. Florian Pyczak

 

Metallphysik
Institut für Werkstoffforschung, Werkstoffphysik
Helmholtz-Zentrum Geesthacht

Max-Planck-Str. 1
21502 Geesthacht

 

Tel: +49 4152/87-2545
florian.pyczak@hzg.de
Website


THEMEN

Die Arbeiten der Abteilung Metallphysik zielen auf die Weiterentwicklung intermetallischer TiAl-Legierungen und geeigneter Herstellverfahren für diese Legierungen mittels der Pulver-, Guß- und Umformtechnologie. Unverzichtbar ist es dabei die Ursachen der für die Anwendung wesentlichen mechanischen Eigenschaften zu verstehen und ihre Abhängigkeit von der Zusammensetzung und den Herstellungsbedingungen aufzuklären. Dazu werden umfangreiche Untersuchungen zur Charakterisierung von Mikrostruktur und atomaren Defekten sowie des mechanischen Verhaltens dieses Legierungssystems angestellt.

TECHNIKEN UND APPARATIVE AUSSTATTUNG

–  Rasterelektronenmikroskope (Leo Gemini 1530, Zeiss DSM 962)

–  Transmissionselektronenmikroskope (Philips CM200, FEI Titan 80-300)

–  dynamisches Hoch-Temperatur-Kalorimeter

–  Bähr Thermoanalyse

–  Leeco Analysesystem

–  Pulververdüsungsanlage

– DS-Einheit

– Labor-Kaltwand-Lichtbogenofen

– Umformsimulator

– Prüfmaschinen
AKTUELLE PROJEKTE

– Investigations on L12 phase and partitioning behavior of alloying elements in Co-base superalloys, Impuls- und Vernetzungsfond der Helmholtz Gemeinschaft

– “Neuartige Triebwerksreparaturverfahren”, Bundesministerium für Wirtschaft und Energie im Rahmen des Luftfahrtforschungsprogrammes (LUFO)

AKTUELLE PUBLIKATIONEN (SCOPUS)

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Li, Y., Pyczak, F., Paul, J., Oehring, M., Lorenz, U., Yao, Z., Ning, Y.: Rafting of γ′ precipitates in a Co-9Al-9W superalloy during compressive creep. (2018) Materials Science and Engineering A, 719, pp. 43-48.

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Kim, Y.M., Mendis, C., Sasaki, T., Letzig, D., Pyczak, F., Hono, K., Yi, S.: Erratum to “Static recrystallization behaviour of cold rolled Mg-Zn-Y alloy and role of solute segregation in microstructure evolution” (Scr. Mater. (2017) (136) (41–45) (S135964621730177X) (10.1016/j.scriptamat.2017.04.001)). (2018) Scripta Materialia, 145, p. 131.

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Li, Y., Pyczak, F., Paul, J., Oehring, M., Lorenz, U., Yao, Z.: Microstructure evolution in L12hardened Co-base superalloys during creep. (2017) Journal of Materials Research, 32 (24), pp. 4522-4530.

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Wang, L., Lorenz, U., Münch, M., Stark, A., Pyczak, F.: Influence of alloy composition and thermal history on carbide precipitation in γ-based TiAl alloys. (2017) Intermetallics, 89, pp. 32-39.

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Wang, L., Zenk, C., Stark, A., Felfer, P., Gabrisch, H., Göken, M., Lorenz, U., Pyczak, F.: Morphology evolution of Ti3AlC carbide precipitates in high Nb containing TiAl alloys. (2017) Acta Materialia, 137, pp. 36-44.

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Gabrisch, H., Lorenz, U., Pyczak, F., Rackel, M., Stark, A.: Morphology and stability of orthorhombic and hexagonal phases in a lamellar γ-Ti-42Al-8.5Nb alloy-A transmission electron microscopy study. (2017) Acta Materialia, 135, pp. 304-313.

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Kim, Y.M., Mendis, C., Sasaski, T., Letzig, D., Pyczak, F., Hono, K., Yi, S.: Static recrystallization behaviour of cold rolled Mg-Zn-Y alloy and role of solute segregation in microstructure evolution. (2017) Scripta Materialia, 136, pp. 41-45.

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Paul, J.D.H., Oehring, M., Appel, F., Pyczak, F.: Depth resolved near-surface residual stresses in γ-based TiAl before and after high-temperature exposure. (2017) Intermetallics, 84, pp. 103-111.

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Luo, X., Ebel, T., Pyczak, F., Limberg, W., Lin, Y.: Carbide evolution and its potential reduction methods in Ti-22Nb based alloys prepared by metal injection moulding. (2017) Materials Letters, 193, pp. 295-298.

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Soyama, J., Oehring, M., Ebel, T., Kainer, K.U., Pyczak, F.: Sintering Behavior and Microstructure Formation of Titanium Aluminide Alloys Processed by Metal Injection Molding. (2017) JOM, 69 (4), pp. 676-682.

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Iqbal, F., Pyczak, F., Neumeier, S., Göken, M.: Crack nucleation and elastic / plastic deformation of TiAl alloys investigated by in-situ loaded atomic force microscopy. (2017) Materials Science and Engineering A, 689, pp. 11-16.

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Amherd Hidalgo, A., Frykholm, R., Ebel, T., Pyczak, F.: Powder Metallurgy Strategies to Improve Properties and Processing of Titanium Alloys: A Review. (2017) Advanced Engineering Materials, . Article in Press.

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Rackel, M.W., Stark, A., Gabrisch, H., Schell, N., Schreyer, A., Pyczak, F.: Orthorhombic phase formation in a Nb-rich γ-TiAl based alloy – An in situ synchrotron radiation investigation. (2016) Acta Materialia, 121, pp. 343-351.

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Tankoua, A.T., Stark, A., Rackel, M.W., Pyczak, F., von Hehl, A.: In situ analysis of the forging process of a novel γ-TiAl alloy using synchrotron radiation [In situ Untersuchung des Schmiedeprozesses einer neuartigen γ-TiAl Legierung unter Verwendung von Synchrotronstrahlung]. (2016) Materialwissenschaft und Werkstofftechnik, 47 (11), pp. 1109-1120.

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Kolb, M., Wheeler, J.M., Mathur, H.N., Neumeier, S., Korte-Kerzel, S., Pyczak, F., Michler, J., Göken, M.: Local mechanical properties of the (β0+ω0) composite in multiphase titanium aluminides studied with nanoindentation at room and high temperatures. (2016) Materials Science and Engineering A, 665, pp. 135-140.

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Prashanth, K.G., Scudino, S., Chaubey, A.K., Löber, L., Wang, P., Attar, H., Schimansky, F.P., Pyczak, F., Eckert, J.: Processing of Al-12Si-TNM composites by selective laser melting and evaluation of compressive and wear properties. (2016) Journal of Materials Research, 31 (1), pp. 55-65.

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Soyama, J., Oehring, M., Limberg, W., Ebel, T., Kainer, K.U., Pyczak, F.: Sintering behaviour of Ti-45Al-5Nb-0.2B-0.2C alloy modifications by additions of elemental titanium and aluminium. (2015) Powder Metallurgy, 58 (5), pp. 369-375.

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Stark, A., Rackel, M., Tankoua, A.T., Oehring, M., Schell, N., Lottermoser, L., Schreyer, A., Pyczak, F.: In situ high-energy X-ray diffraction during hot-forming of a multiphase TiAl Alloy. (2015) Metals, 5 (4), pp. 2252-2265.

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Soyama, J., Oehring, M., Limberg, W., Ebel, ., Kainer, K.U., Pyczak, F.: The effect of zirconium addition on sintering behaviour, microstructure and creep resistance of the powder metallurgy processed alloy Ti-45Al-5Nb-0.2B-0.2C. (2015) Materials and Design, 84, pp. 87-94.

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Zhao, D., Chang, K., Ebel, T., Nie, H., Willumeit, R., Pyczak, F.: Sintering behavior and mechanical properties of a metal injection molded Ti-Nb binary alloy as biomaterial. (2015) Journal of Alloys and Compounds, 640, pp. 393-400.

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Wang, L., Gabrisch, H., Lorenz, U., Schimansky, F.-P., Schreyer, A., Stark, A., Pyczak, F.: Nucleation and thermal stability of carbide precipitates in high Nb containing TiAl alloys. (2015) Intermetallics, 66, art. no. 5703, pp. 111-119.

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Pyczak, F., Bauer, A., Göken, M., Lorenz, U., Neumeier, S., Oehring, M., Paul, J., Schell, N., Schreyer, A., Stark, A., Symanzik, F.: The effect of tungsten content on the properties of L12-hardened Co-Al-W alloys. (2015) Journal of Alloys and Compounds, 632, pp. 110-115.

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Wang, Z., Prashanth, K.G., Chaubey, A.K., Löber, L., Schimansky, F.P., Pyczak, F., Zhang, W.W., Scudino, S., Eckert, J.: Tensile properties of Al-12Si matrix composites reinforced with Ti-Al-based particles. (2015) Journal of Alloys and Compounds, 630, pp. 256-259.

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Salih, M.Z., Uhlarz, M., Pyczak, F., Brokmeier, H.-G., Weidenfeller, B., Al-Hamdany, N., Gan, W.M., Zhong, Z.Y., Schell, N.: The effect of magnetic annealing on crystallographic texture and magnetic properties of Fe-2.6% Si. (2015) Journal of Magnetism and Magnetic Materials, 381, pp. 350-359.

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Rackel, M., Stark, A., Gabrisch, H., Schimansky, F.-P., Schell, N., Schreyer, A., Pyczak, F.: In situ synchrotron radiation measurements of orthorhombic phase formation in an advanced TiAl alloy with modulated microstructure. (2015) Materials Research Society Symposium Proceedings, 1760, pp. 120-126.

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Bauer, A., Neumeier, S., Pyczak, F., Göken, M.:Influence of iridium on the properties of γ′-strengthened co-base superalloys. (2015) Advanced Engineering Materials, 17 (6), pp. 748-754.

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Wang, L., Gabrisch, H., Lorenz, U., Schimansky, F.-P., Stark, A., Pyczak, F.: Perovskite Ti<inf>3</inf>AlC carbide splitting in high Nb containing tial alloys. (2015) Materials Research Society Symposium Proceedings, 1760, pp. 31-36.

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Wang, L., Pyczak, F., Gabrisch, H., Lorenz, U., Münch, M., Schimansky, F.-P., Schreyer, A., Stark, A: Effects of carbon content, annealing condition and internal defects on the nucleation, growth and coarsening of P-rype carbides in high niobium containing TiAl alloys. (2015) Materials Research Society Symposium Proceedings, 1760, pp. 61-66.

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Bolz, S., Oehring, M., Lindemann, J., Pyczak, F., Paul, J., Stark, A., Lippmann, T., Schrüfer, S., Roth-Fagaraseanu, D., Schreyer, A., Weiß, S.: Microstructure and mechanical properties of a forged β-solidifying γ TiAl alloy in different heat treatment conditions. (2015) Intermetallics, 58, pp. 71-83.

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Larráyoz Izcara, X., Guirao Blank, A., Pyczak, F., Staron, P., Schumann, S., Huber, N.: Characterization and modeling of the influence of artificial aging on the microstructural evolution of age-hardenable AlSi10Mg(Cu) aluminum alloys. (2014) Materials Science and Engineering A, 610, pp. 46-53.

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Imayev, V., Gaisin, R., Gaisina, E., Imayev, R., Fecht, H.-J., Pyczak, F.: Effect of hot forging on microstructure and tensile properties of Ti-TiB based composites produced by casting. (2014) Materials Science and Engineering A, 609, pp. 34-41.

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Stark, A., Oehring, M., Pyczak, F., Lippmann, T., Lottermoser, L., Schreyer, A.: The transformation mechanism of β phase to ω-related phases in Nb-rich γ-TiAl alloys studied by in situ high-energy X-ray diffraction. (2014) Materials Science Forum, 772, pp. 85-89.

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Jabbar, H., Monchoux, J.-P., Thomas, M., Pyczak, F., Couret, A.: Improvement of the creep properties of TiAl alloys densified by Spark Plasma Sintering. (2014) Intermetallics, 46, pp. 1-3.

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Löber, L., Schimansky, F.P., Kühn, U., Pyczak, F., Eckert, J.: Selective laser melting of a beta-solidifying TNM-B1 titanium aluminide alloy. (2014) Journal of Materials Processing Technology, 214 (9), pp. 1852-1860.

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Zhao, D., Chang, K., Ebel, T., Qian, M., Willumeit, R., Yan, M., Pyczak, F.: Titanium carbide precipitation in Ti-22Nb alloy fabricated by metal injection moulding. (2014) Powder Metallurgy, 57 (1), pp. 2-4.