Visits: 82656850
AMS now reading: 1




Year 2007 No 4

Bujnošková K., Drápala J., Štěpánek J.
SEGREGATION BEHAVIOUR OF NIOBIUM AND ITS INFLUENCE ON STRUCTURAL CHARACTERISTICS OF MOLYBDENUM SINGLE CRYSTALS PREPARED BY ELECTRON BEAM FLOATING ZONE
Keywords: tungsten|molybdenum|single crystal|electron beam floating zone melting|plasma metallurgy|
No 4 (2007), p. 481-488
  mag01.pdf (482 kB)
mag01_eng.txt (2 kB)  

Jonšta P., Sojka J., Váňová P.
COMPARISON OF RESISTANCE OF QUENCHED AND TEMPERED STEELS TO SULPHIDE STRESS CRACKING
Keywords: sulphide stress cracking|heat treatment|microstructure|mechanical properties|
No 4 (2007), p. 489-494
  mag02.pdf (710 kB)
mag02_eng.txt (2 kB)  

Kubečka P., Váňová P., Jonšta P. , Filuš F.
THE INFLUENCE OF SURFACE CHARACTERISTICS ON HYDROGEN EMBRITTLEMENT OF CARBON STEELS
Keywords: slow strain rate test|hydrogen embrittlement|fish eyes|carbon steel|
No 4 (2007), p. 495-502
  mag03.pdf (875 kB)
mag03_eng.txt (2 kB)  

Malcharcziková J., Pešička J., Kursa M.
STRUCTURAL AND MICRO-STRUCTURAL ANALYSIS OF DIRECTIONALLY CRYSTALLISED INTER-METALLIC COMPOUND Ni3Al REALISED BY TEM
Keywords: Ni-Al based intermetallic compounds|tensile tests|transmission electron microscopy|dislocation density|
No 4 (2007), p. 503-510
  mag04.pdf (1 MB)
mag04_eng.txt (2 kB)  

Mazancová E., Mazanec K.
CONTRIBUTION TO PHYSICAL METALLURGY OF NEW HIGH STRENGTH Mn MATERIAL
Keywords: mechanical twinning|-martensite|stacking fault energy|necking formation|twinning induced plasticity (TWIP)|
No 4 (2007), p. 511-516
  mag05.pdf (849 kB)
mag05_eng.txt (2 kB)  

Řeháčková L., Kalousek J.,Dobrovský L., Kursa M., Drápala J.
CONTRIBUTION TO MATHEMATICAL MODELLING OF MANGANESE DIFFUSION IN A WELDED JOINT OF TWO IRON-BASED MATERIALS
Keywords: welded joint|diffusion|manganese re-distribution|
No 4 (2007), p. 517-523
  mag06.pdf (274 kB)
mag06_eng.txt (2 kB)  

Szurman I., Kursa M., Dlouhý A.
MICROSTRUCTURE OF Ni40-Ti50-Cu10 SHAPE MEMORY ALLOY STUDIED BY TEM
Keywords: Ni-Ti alloys|Transmission electron microscopy|vacuum induction melting|
No 4 (2007), p. 524-530
  mag07.pdf (672 kB)
mag07_eng.txt (1 kB)  

Čížek L., Hanus A., Sozańska M., Tański T., Pawlica L.
STRUCTURE CHARACTERISTICS OF MAGNESIUM ALLOYS WITH ADMIXTURE OF ALUMINUM, SILICON AND ZIRCONIUM
Keywords: Magnesium alloys|Metallographic analysis|Structure|
No 4 (2007), p. 531-538
  mag08.pdf (2 MB)
mag08_eng.txt (2 kB)  

Dobrovská J., Dočekalová S., Smetana B.
STUDY OF COOLING RATE EFFECT ON TRANSFORMATION TEMPERATURES IN THE COURSE OF IN 738LC SOLIDIFICATION
Keywords: transformation temperatures|DTA-method|X-ray spectroscopy|IN 738LC|
No 4 (2007), p. 539-545
  mag09.pdf (1 MB)
mag09_eng.txt (2 kB)  

Jonšta Z., Jonšta P., Vodárek V., Mazanec K.
PHYSICAL-METALLURGICAL CHARACTERISTICS OF NICKEL SUPER-ALLOYS OF INCONEL TYPE
Abstract
Aerospace industry often uses nickel super-alloys for blades of jet engine turbines. The reason is that this material can satisfy numerous extreme requirements, such as e.g. strength even at very high temperatures, resistance to fatigue damage, resistance to fatigue effect of combustion gases, etc. The main requirement is assurance of high operational reliability and safety at exploitation under high temperatures. Long-term service life and material reliability is directly linked to its micro-structure, or with its stability at long-term exploitation. These materials are usually alloyed in a complex manner and they are very complicated from structural viewpoint [1].
Presented article deals with analysis of physical-metallurgical characteristics of cast variants of nickel super-alloys, namely of the types INCONEL 713LC and INCONEL 792 – 5A. Several strengthening mechanisms are applied in these types of super-alloys. Principal mechanism is precipitation strengthening by coherent precipitates of Inter.-metallic phase Ni3Al, or Ni3 (Ti, Al). The analysis as such is based on evaluation of micro-structural parameters of these super-alloys by application of light microscopy, as well as electron microscopy and chemical micro-analysis.
Structural analysis with use of light microscopy was performed on the light microscope OLYMPUS IX 71, and electron-microscopic analysis was realised on the scanning electron microscope JEOL JSM – 5510 in the mode of secondary electrons. Local chemical analysis was then made on the electron micro-analyser JCXA 733, equipped with energy-dispersive analyser Sapphire.
Keywords: nickel super–alloys|as–cast condition|structural – phase analysis|
No 4 (2007), p. 546-553
  mag10.pdf (2 MB)
mag10_eng.txt (2 kB)  

Sojka J., Filuš F., Rytířová L., Jerome M.
DIFFUSION CHARACTERISTICS OF HYDROGEN IN MICRO ALLOY STEELS
Keywords: Micro alloy steels|hydrogen diffusion|electrochemical permeation method|microstructure|banded structure|
No 4 (2007), p. 554-560
  mag11.pdf (1 MB)
mag11_eng.txt (2 kB)  

Greger M., Kocich R., Kuřetová B., Vlček M.
ULTRAFINE GRAINED COPPER BY EQUAL CHANNEL ANGULAR EXTRUSION (ECAE) PROCESSING
Keywords: equal channel angular pressing|evolution structure Cu|
No 4 (2007), p. 561-569
  mag12.pdf (843 kB)
mag12_eng.txt (2 kB)  

Kocich R., Kursa M.,Greger M., Szurman I.
DEFORMATION BEHAVIOUR OF Ni-Ti SHAPE MEMORY ALLOYS AT ECAP PROCESS
Keywords: ECAP technology|Ni-Ti shape memory alloys|mechanical properties|
No 4 (2007), p. 570-576
  mag13.pdf (574 kB)
mag13_eng.txt (1 kB)  

Rusz S., Schindler I., Suchánek P., Turoňová P., Kubečka P., Heger M.
UTILIZATION OF THE HOT WEDGE TEST IN RESEARCH OF HOT FORMABILITY OF FREE-CUTTING STAINLESS STEELS
Keywords: wedge rolling test|free-cutting stainless steel|hot formability|
No 4 (2007), p. 577-582
  mag14.pdf (379 kB)
mag14_eng.txt (2 kB)  

Fabík R., Kurek V., Kocich R., Macháčková A.
LABORATORY SIMULATION OF HEAT TREATMENT OF RAILS
Keywords: cooling curves|thermocouples|rails|TT diagram|hardness|
No 4 (2007), p. 583-588
  mag15.pdf (900 kB)
mag15_eng.txt (2 kB)  

Fabík R., Kurek V., Bazgierová E.
DETERMINATION OF TECHNOLOGICAL PARAMETERS FOR COOLING OF RAILS BY MATHEMATICAL MODELLING
Keywords: cooling curves|inverse analysis|FEM|heat transfer coefficient|rails cooling|hardness|
No 4 (2007), p. 589-595
  mag16.pdf (419 kB)
mag16_eng.txt (2 kB)  

Janošec M., Palát J., Schindler I., Legerski M., Růžička M., Místecký E.
MICROSTRUCTURAL CHANGES AND EVOLUTION OF MECHANICAL PROPERTIES OF COLD ROLLED AND ANNEALED HSLA STEEL STRIPS
Keywords: HSLA steel|cold rolling|annealing|mechanical testing|microstructure|
No 4 (2007), p. 596-601
  mag17.pdf (369 kB)
mag17_eng.txt (2 kB)  

Schindler I., Bílovský P., Rusz S., Plura J., Hadasik E., Jurko V.
INFLUENCE OF HEATING REGIME AND PHASE TRANSFORMATIONS ON DEFORMATION RESISTANCE OF IF STEEL
Keywords: IF steel|deformation resistance|phase transformation|ferritic rolling|
No 4 (2007), p. 602-609
  mag18.pdf (658 kB)
mag18_eng.txt (2 kB)  

Kubina T.,Bořuta J., Schindler I.
NEW POSSIBILITIES OF EVALUATION OF THE DEGREE OF SOFTENING FROM TORSION PLASTOMETRIC TEST
Keywords: softening|recrystallization fraction|low-carbon steel|torsion test|
No 4 (2007), p. 610-617
  mag19.pdf (810 kB)
mag19_eng.txt (2 kB)  

Suchánek P., Schindler I., Kulveitová H., Kratochvíl P., Hanus P.
MODELS OF MEAN FLOW STRESS AND STRUCTURE EVOLUTION OF IRON ALUMINIDES IN HOT FORMING
Keywords: Structure of iron aluminides|Fe3Al|hot rolling|mean flow stress|sample with graded in size|
No 4 (2007), p. 618-624
  mag20.pdf (403 kB)
mag20_eng.txt (2 kB)  

Kozelský P., Schindler I., Cagala M., Rusz S., Heger M., Křupala A.
HOT FORMABILITY OF LEDEBURITIC TOOL STEEL X155CrVMo12.1
Keywords: tool steel|hot formability|tensile test|DTA|rolling temperature|
No 4 (2007), p. 625-632
  mag21.pdf (574 kB)
mag21_eng.txt (2 kB)  

Lenort R.
SIMULATION AS EFFECTIVE TOOL FOR ANALYSIS OF FLOATING CAPACITY BOTTLENECKS IN METALLURGICAL PRODUCTION
Keywords: floating capacity bottleneck|simulation|cutting line|hot rolled bars|analysis of metallurgical processes|
No 4 (2007), p. 633-641
  mag22.pdf (335 kB)
mag22_eng.txt (2 kB)  

Drápala J., Kozelková R., Vodárek V., Kubíček P., Vřešťál J., Kroupa A.
STUDY OF THE COPPER – INDIUM – TIN TERNARY SYSTEM BY MEANS OF REACTIVE DIFFUSION
Keywords: Copper–indium–tin ternary system|phase equilibria|reactive diffusion|WDX chemical microanalysis|thermodynamic calculation|
No 4 (2007), p. 642-653
  mag23.pdf (1 MB)
mag23_eng.txt (2 kB)  

Hanus A., Lichý P., Kozelský P., Čížek L., Cagala M.
THERMOMECHANICAL PROPERTIES OF MAGNESIUM ALLOY Mg0,7Zr
Keywords: relaxation properties at high temperatures|Mg alloy Mg0,7Zr|
No 4 (2007), p. 654-659
  mag24.pdf (453 kB)
mag24_eng.txt (2 kB)  

Aksenov S., Fabik R., Kliber J.
THE NUMERICAL PREDICTION OF FRICTION FORCES DISTRIBUTION WITHIN THE ROLL BITE WHEN HOT ROLLING STEEL
Keywords: Rolling friction|FEM|slab method|friction variation|mathematic simulation|
No 4 (2007), p. 660-666
  mag25.pdf (428 kB)
mag25_eng.txt (2 kB)