prof. RNDr. Antonín Dlouhý, CSc.
Position: head
Groups: Multiscale Modelling and Measurements of Physical Properties (CEITEC IPM), Advanced High-temperature Materials Group
Rooms: 205
Phone numbers: +420 532 290 412
Interstitial impurities in NiTi-based shape memory alloys
Phase Stability and Plasticity in Medium-to-High-Entropy Alloys
Martensitic transformations in NiTi alloys
Deformation mechanisms of in-situ composite materials
Struktura, vlastnosti a metalurgie téměř stechiometrických slitin TiAl
NiTi Shape Memory Alloys and Their Processing-Structure-Transformation Relationship
Thermal and Strain Cycles in the TiAl Intermetallic Casting - Ceramic Shell Mould System
A Numerically Based Optimization of a Near-gamma TiAl Precision Casting Process
Hynek Hadraba, Zdenek Chlup, Antonin Dlouhy, Ferdinand Dobes, Pavla Roupcova, Monika Vilemova, Jiri Matejicek: Oxide dispersion strengthened CoCrFeNiMn high-entropy alloy, Materials Science and Engineering: A 689 (2017) 252–256.

Oldřich Schneeweiss, Martin Friák, Marie Dudová, David Holec, Mojmír Šob, Dominik Kriegner, Václav Holý, Přemysl Beran, Easo P. George, Jörg Neugebauer, and Antonín Dlouhý,
Magnetic properties of the CrMnFeCoNi high-entropy alloy,
Physical Review B 96 (2017) 014437-1 - 014437-13.

We present experimental data showing that the equiatomic CrMnFeCoNi high-entropy alloy undergoes two magnetic transformations at temperatures below 100 K while maintaining its fcc structure down to 3 K. The first transition, paramagnetic to spin glass, was detected at 93 K and the second transition of the ferromagnetic type occurred at 38 K. Field-assisted cooling below 38 K resulted in a systematic vertical shift of the hysteresis curves. Strength and direction of the associated magnetization bias was proportional to the strength and direction of the cooling field and shows a linear dependence with a slope of 0.006 +/- 0.001 emu/T. The local magnetic moments of individual atoms in the CrMnFeCoNi quinary fcc random solid solution were investigated by ab initio (electronic density functional theory) calculations. Results of the numerical analysis suggest that, irrespective of the initial configuration of local magnetic moments, the magnetic moments associated with Cr atoms align antiferromagnetically with respect to a cumulative magnetic moment of their first coordination shell. The ab initio calculations further showed that the magnetic moments of Fe and Mn atoms remain strong (between 1.5 and 2 Bohr magneton), while the local moments of Ni atoms effectively vanish. These results indicate that interactions of Mn- and/or Fe-located moments with the surrounding magnetic structure account for the observed macroscopic magnetization bias.

Zalezak T., Siska F., Stratil L., Luptakova N., Smid M., Bartkova D., Svoboda J., Dlouhy A.
A Numerical Analysis of Deformation Processes in Oxide Dispersion-Strengthened Materials – Influence of Dislocation-Particle Interactions
Solid State Phenomena 258 (2017) p. 106-109
Wu X., Wollgramm P., Somsen C., Dlouhy A., Kostka A., Eggeler G.
Double minimum creep of single crystal Ni-base superalloys
Acta Materialia 112 (2016) p. 242-260
Yardley V., Povstugar I., Choi P., Raabe D., Parsa A. B., Kostka A., Somsen Ch., Dlouhy A., Neuking K., George E. P., Eggeler G.
On Local Phase Equilibria and the Appearance of Nanoparticles in the Microstructure of Single-Crystal Ni-Base Superalloys
Advanced engineering materials 18 (2016) p. 1556-1567
Otto F., Dlouhy A., Pradeep K.G., Kubenova M., Raabe D., Eggeler G., George E.P.
Decomposition of the single-phase high-entropy alloy CrMnFeCoNi
after prolonged anneals at intermediate temperatures
Acta Materialia 112 (2016) p. 40-52
Parsa A.B., Wollgramm P., Buck H., Somsen C., Kostka A., Povstugar I., Choi PP., Raabe D., Dlouhy A., Muller J., Spiecker E., Demtroder K., Schreuer J., Neuking K., Eggeler G.:
Advanced Scale Bridging Microstructure Analysis of Single Crystal Ni-Base Superalloys
Advanced Engineering Materials 17, 2 (2015) p. 216-230
Parsa A.B., Wollgramm P., Buck H., Kostka A., Somsen C., Dlouhy A., Eggeler G.:
Ledges and grooves at γ/γ′ interfaces of single crystal superalloys
Acta Mater. 90 (2015) p. 105-117
Zalezak T., Dlouhy A.
3D Discrete Dislocation Dynamics:
Inuence of Segment Mobility on Critical Shear Stress
Acta physica polonica A 128 (2015) p. 654-656
Záležák, T., Dlouhý, A.:
3D discrete dislocation dynamics applied to a motion of low-angle tilt boundaries
Key Engineering Materials 592-593 (2014) 87-91
M. Kuběnová, J. Zálešák, J. Čermák, A. Dlouhý: Impact of hydrogen-assisted heat treatments on microstructure and transformation path in a Ni-rich NiTi shape memory alloy. J. of Alloy and Comp. 577S (2013) 287-290.
Jacome L. Agudo, Eggeler G., Dlouhy A.:
Advanced scanning transmission stereo electron microscopy of structural and functional engineering materials
ULTRAMICROSCOPY 122, (2012), p.48-59, DOI: 10.1016/j.ultramic.2012.06.017
Kurumlu D., Payton EJ., Somsen C., Dlouhy A., Eggeler G.:
On the presence of work-hardened zones around fibers in a short-fiber-reinforced Al metal matrix composite
Acta Mater. 60, (2012), p. 6051-6064, DOI:10.1016/j.actamat.2012.07.042
Manchuraju S., Kroeger A., Somsen C., Dlouhy A., Eggeler G., Sarosi P.M., Anderson P.M., Mills M.J.:
Pseudoelastic deformation and size effects during in situ transmission electron microscopy tensile testing of NiTi
Acta Mater. 60, (2012), p. 2770-2777, DOI: 10.1016/j.actamat.2012.01.043
Zalezak T., Dlouhy A.:
3D Discrete Dislocation Dynamics Applied to Interactions between Dislocation Walls and Particles
Acta Physica Polonica A, (2012), p. 450-452
Radim Kocich, Miroslav Kursa, Ivo Szurman and Antonín Dlouhý:
The influence of imposed strain on the development of microstructure and transformation characteristics of Ni–Ti shape memory alloys
Journal of Alloys and Compounds,Volume 509, Issue 6, 10 February 2011, Pages 2716-2722
Olbricht, J., Yawny, A., Pelegrina, J. L., Dlouhy, A., Eggeler, G.:
On the Stress-Induced Formation of R-Phase in Ultra-Fine-Grained Ni-Rich NiTi Shape Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science, Vol. 42A, Issue: 9 (2011), pp 2556-2574
Frotscher, M, Wu, SN, Simon, T , Somsen, C, Dlouhy, A, Eggeler, G.:
Elementary Deformation and Damage Mechanisms During Fatigue of Pseudoelastic NiTi Advanced Engineering Materials, Vol. 13, 5 (2011), pp. B181-B186
Zalezak, T, Dlouhy, A.:
3D discrete dislocation modelling of high temperature plasticity
Key Engineering Materials, Vol. 465 (2011), pp 115-118
KRUML T, DLOUHÝ A, PETRENEC M, OBRTLÍK K, POLÁK J: Fatigue properties of high Nb TiAl alloy. J. Phys.: Conf. Ser. 240 (2010) 012057.
Frenzel J, George EP, Dlouhy A, et al.:
Influence of Ni on martensitic phase transformations in NiTi shape memory alloys
ACTA MATERIALIA Vol.58, (2010), p. 3444-3458.
D. Peter, G.B. Viswanathan, A. Dlouhy and G. Eggeler:
Analysis of local microstructure after shear creep deformation of a fine-grained duplex γ-TiAl alloy
Acta Materialia, Volume 58, Issue 19, November 2010, Pages 6431-6443
J. Frenzel, E.P. George, A. Dlouhy, Ch. Somsen, M.F.-X. Wagner and G. Eggeler:
Influence of Ni on martensitic phase transformations in NiTi shape memory alloys
Acta Materialia,Volume 58, Issue 9, May 2010, Pages 3444-3458
T. Simona, A.Kröger, C. Somsena, A. Dlouhy and G. Eggeler:
On the multiplication of dislocations during martensitic transformations in NiTi shape memory alloys
Acta Materialia,Volume 58, Issue 5, March 2010, Pages 1850-1860
A. Dlouhy, K. Kuchařová, A. Orlová
Long-term creep and creep rupture characteristics of TiAl-base intermetallics
Mat. Sci. Eng. A 510-511,(2009), p. 350
A. Orlova,K. Kucharova, A. Dlouhy,
< c >-component plastic displacements in different microstructures of TiAl-base intermetallics
Mat. Sci. Eng. A 483, (2008), p. 109
A. Kröger, S. Dziaszyk, J. Frenzel, Ch. Somsen, A. Dlouhy and G. Eggeler
Direct transmission electron microscopy observations of martensitic transformations in Ni-rich NiTi single crystals during in situ cooling and straining
Mater. Sci. Eng.A , Vols 481-482, (2008), p. 452
D. Holec, O. Bojda and A. Dlouhý
Ni4Ti3 precipitate structures in Ni-rich NiTi shape memory alloys
Mater. Sci. Eng. , Vols 481-482, (2008), p. 462
A. Dlouhý, O. Bojda, Ch. Somsen and G. Eggeler
Conventional and in-situ transmission electron microscopy investigations into multistage martensitic transformations in Ni-rich NiTi shape memory alloys
Mater. Sci. Eng. A, Vols 481-482, (2008), p. 409
Dlouhý A., Dočekalová K., Bartak T., Dlouhý I., Zemčík L.: Refractory crucible melting and related mechanical properties of Nb-Containing TiAl Alloys; Structural Aluminides for Elevated Temperatures, TMS Meeting 2008; pp. 9-14.
A. Dlouhy, K. Docekalova, T. Bartak, et al.
Refractory crucible melting and related mechanical properties of Nb-containing TiAl alloys
Structural Aluminides for Elevated temperatures, (2008), p. 9
J. Michutta, Ch. Somsen, A. Yawny, A. Dlouhy and G. Eggeler
Elementary martensitic transformation processes in Ni-rich NiTi single crystals with Ni4Ti3 precipitates
Acta Materialia, Volume 54, Issue 13, August 2006, Pages 3525-3542
A. Orlová, K. Kuchařová, A. Dlouhý:
Microstructural mechanisms of creep in gammaTi-52Al
Kovove Mater. 43: 55-65, 2005
O. Bojda, G. Eggeler, A. Dlouhý:
Scripta Materialia 53 (2005) 99-104
D. Holec, A. Dlouhý:
Materials Science Forum 482 (2005) 159-162
G. Eggeler, A. Dlouhý:
Zeitschrift für Metallkunde 96 (2005) 743-748
D. Holec, A. Dlouhý:
Zeitschrift für Metallkunde 96 (2005) 558-565
A. Orlová, K. Kuchařová, A. Dlouhý:
Zeitschrift fur Metallkunde 95 (2004) 1011-1019
A.Orlová, K. Kuchařová, A. Dlouhý:
Evolution of microstructure during creep in gamma Ti-52Al at 1100K and high applied stresses
Z. Metallkde 95: 1011-1019, 2004
A. Dlouhý, L. Zemčík, R. Válek:
Gamma Titanium Aluminides 2003, eds. Y.-W. Kim, H. Clemens and A.H. Rosenberger, TMS, Warrendale 2004, p. 291
A. Dlouhý, K. Kuchařová:
Intermetallics 12 (2004) 705-711
A. Dlouhý, J. Khalil-Allafi, G. Eggeler:
Zeitschrift für Metallkunde 95 (2004) 518-524
J. Khalil-Allafi, G. Eggeler, A. Dlouhý, W.W. Schmahl, Ch. Somsen:
Materials Science & Engineering A 378 (2004) 148-151
A. Dlouhý, L. Zemčík:
Slévárenství 52 (6) (2004) 227-232
L. Zemčík, A. Dlouhý:
Slévárenství 52 (6) (2004) 223-227
A. Dlouhý, J. Khalil-Allafi, G. Eggeler:
Philosophical Magazine A 83 (2003) 339-363
A. Dronhofer, J. Pešička, A. Dlouhý, G. Eggeler:
Zeitschrift für Metallkunde 94 (2003) 511-520
J. Khalil-Allafi, A. Dlouhý, G. Eggeler:
J. Phys. IV France 112 Part 2 (2003) 681-684
G. Eggeler, J. Khalil-Allafi, A. Dlouhý, X. Ren:
J. Phys. IV France 112 Part 2 (2003) 673-676
H. Sitepu, W.W. Schmahl, J. Khalil Allafi, G. Eggeler, A. Dlouhý, D.M. Toebbens, M. Tovar:
Scripta Materialia 46 (2002) 543-548
G. Eggeler, J. Khalil-Allafi, K. Neuking, A. Dlouhý:
Zeitschrift für Metalkunde 93 (2002) 654-660
J. Khalil-Allafi, A. Dlouhý, G. Eggeler:
Acta Materialia 50 (2002) 4255-4274
A. Dlouhý, D. Arrell, B. Karlsson, J. Lapin, V. Lupinc, M. Nazmy, K. Nikbin, M. Staubli:
Materials for Advanced Power Engineering 2002, Part II, Proceedings of the 7th Liège Conference, ed. J.Lecomte-Beckers et al., Jülich 2002, p. 605
A. Dlouhý, M. Probst-Hein, G. Eggeler:
Materials Science & Engineering A 309-310 (2001) 278-282
A. Dlouhý, K. Kuchařová:
Creep and Fracture of Engineering Materials and Structures, Proceedings of the Ninth International Swansea Conference, ed. J. D. Parker, The Institute of Materials, London 2001, p. 321
M. Probst-Hein, A. Dlouhý, G. Eggeler:
Materials Science & Engineering A 319-321 (2001) 379-382
A. Dlouhý, K. Kuchařová, J. Březina:
Materials Science & Engineering A 319-321 (2001) 820-826
G.F. Eggeler, K. Neuking, A. Dlouhy, E. Kobus:
Materials Science Forum Vols. 327-328 (2000) 183-186
A. Dlouhý, K. Kuchařová, T.Horkel:
Key Engineering Materials 171-174 (2000) 693-700
Information leaflet
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central european institute of technology


Last update
19. 09. 2017