Visits: 85315768
AMS now reading: 1




Year 2006 No 4

Drápala J., Zlatohlávek P., Smetana B., Vodárek V., Kursa M., Vřešťál J., Kroupa A.
STUDY OF SELECTED ALLOYS ON THE BASE OF THE COPPER – INDIUM – TIN TERNARY SYSTEM
Keywords: Copper – indium – tin ternary system|thermodynamic calculation|phase equilibria|heat treatment|DTA analysis|
No 4 (2006), p. 343-356
  mag01.pdf (1 MB)
mag01_eng.txt (2 kB)  

Greger M., Kocich R., Kander L .
SUPERPLASTICITY OF MAGNESIUM ALLOYS
Keywords: superplasticity|ARB|rolling|structure and properties|
No 4 (2006), p. 357-365
  mag02.pdf (1 MB)
mag02_eng.txt (2 kB)  

Strnadel, B., Kursa, M.
MODELLING RESIDUAL STRAINS DURING THE CYCLING OF TI-NI AND TI-NI-CU SHAPE MEMORY ALLOYS UNDER PSEUDOELASTICITY CONDITIONS
Keywords: shape memory alloys|Ti-Ni alloy|Ti-Ni-Cu alloy|pseudoelasticity|critical stress for inducing martensite|plastic strain propagation|
No 4 (2006), p. 366-378
  mag03.pdf (517 kB)
mag03_eng.txt (2 kB)  

Schindler I., Janošec M., Pachlopník R., Černý L.
MODELS OF HOT DEFORMATION RESISTANCE OF A NB-TI HSLA STEEL
Keywords: microalloyed steel|strain|equivalent stress|recrystallization|deformation resistance|forming force|
No 4 (2006), p. 379-387
  mag04.pdf (313 kB)
mag04_eng.txt (2 kB)  

Řeháčková L., Kalousek J., Dobrovská J., Stránský K., Dobrovský L.
ON METHODOLOGY OF CONCENTRATION DATA PROCESSING AT MATHEMATICAL MODELLING OF SUBSTITUTION ELEMENT DIFFUSION IN THE ZONE OF WELDED JOINT OF STEELS
Keywords: redistribution of substitution elements, diffusion|welded joint of steels|
No 4 (2006), p. 388-398
  mag05.pdf (373 kB)
mag05_eng.txt (2 kB)  

Řeháčková L., Kalousek J., Dobrovská J., Stránský K.
ON DETERMINATION OF THE DIFFUSION LAYER AND PENETRATION OF SUBSTITUTIVE ELEMENT IN WELDED JOINT OF TWO DIFFERENT STEELS
Keywords: diffusion|diffusion layer|modelling|welded joint of steels|
No 4 (2006), p. 399-404
  mag06.pdf (276 kB)
mag06_eng.txt (2 kB)  

Smíšek V., Kursa M.
EFFECT OF DIRECTIONAL CRYSTALLISATION ON MICROSTRUCTURE OF Ti 46Al-5Nb-1W ALLOY
Keywords: -TiAl|dendritic microstructure|lamellar microstructure|directional solidification|
No 4 (2006), p. 405-410
  mag07.pdf (990 kB)
mag07_eng.txt (2 kB)  

Szurman I., Kursa M., Jedlička Z.
TRANSFORMATION TEMPERATURES OF NI-TI BASED ALLOYS MEASURED BY RESISTOMETRIC AND THERMO-DILATOMETRIC METHODS
Keywords: Ni-Ti alloys|transformation temperature|resistometric method|dilatometric method|
No 4 (2006), p. 411-419
  mag08.pdf (359 kB)
mag08_eng.txt (2 kB)  

Losertová M. , Štěpán P.
THE EFFECT OF HYDROGEN ON THE EMBRITTLEMENT OF NiTi ALLOY
Keywords: Shape memory alloy|nickel-titanium|hydrogen embrittlement|hydrogen effect|AFM study|fractography|
No 4 (2006), p. 420-426
  mag09.pdf (877 kB)
mag09_eng.txt (2 kB)  

Malcharcziková J., Kursa M., Beljajev I. V.
IMPACT OF CONDITIONS OF DIRECTIONAL CRYSTALLISATION BY BRIDGMAN METHOD ON PHYSICAL AND METALLURGICAL CHARACTERISTICS OF Ni3Al
Keywords: Ni-Al based intermetallic compounds|tensile tests|acoustic emission|grain orientation|
No 4 (2006), p. 427-435
  mag10.pdf (689 kB)
mag10_eng.txt (2 kB)  

Jonšta Z., Jonšta P., Sojka J., Vodárek V.
STRUCTURAL PHASE ANALYSIS OF NICKEL SUPER-ALLOY INCONEL 713LC
Keywords: structural phase analysis|heat treatment|inter-metallic phase γ’|nickel super alloy|
No 4 (2006), p. 436-442
  mag11.pdf (963 kB)
mag11_eng.txt (2 kB)  

Hanus A., Lichý P., Kozelský P., Čížek L., Crha J.
THERMOMECHANICAL PROPERTIES OF MAGNESIUM ALLOYS – AZ61 BY USING ACOUSTIC EMISSION
Keywords: acoustic emission|relaxation properties at high temperatures|magnesium alloy|
No 4 (2006), p. 443-453
  mag12.pdf (759 kB)
mag12_eng.txt (2 kB)  

Žáček O., Kliber J., Schindler I.
TRIP STEEL THERMOMECHANICAL PROCESSING SIMULATION AND SUBSEQUENT MICROSTRUCTURE EVALUATION CONCEPTS
Keywords: TRIP steel|retained austenite|thermomechanical processing|laboratory rolling|metallography|
No 4 (2006), p. 454-461
  mag13.pdf (839 kB)
mag13_eng.txt (2 kB)  

Sojka J., Váňová P., Jonšta P., Rytířová L., Jerome M.
ROLE OF TESTING CONDITIONS IN SULPHIDE STRESS CRACKING OF X52 AND X60 API STEELS
Abstract
Resistance of X52 and X60 API steels to sulphide stress cracking was tested by means of tensile tests at a constant load below the yield strength in accordance to NACE standard TM 0177 and also by means of slow strain rate tensile tests. Both steels were tested in two different states, after hot rolling and after laboratory water quenching and high temperature tempering at 600 °C. The results showed that steel resistance to sulphide stress cracking depended strongly on the microstructure but only when tests at the constant load were performed. In this case, quenching and tempering increased steel resistance to sulphide stress cracking considerably, in a similar way as in the case of hydrogen induced cracking. The results of slow strain rate tensile tests were different: they were similar regardless of the heat treatment. On the other hand, degree of degradation depended strongly on specimen orientation. Degradation of steel properties was much more pronounced for tests performed in through thickness orientation of tensile specimens while it was less pronounced for tests performed in longitudinal or transversal orientation of tensile specimens. Non-metallic inclusions seemed to play an important role as crack initiation sites during slow strain rate tensile tests. For tests performed in longitudinal or transversal direction cracks initiated on globular oxides predominantly while in through thickness orientation cracks initiated on elongated manganese sulphides only. This behaviour could be related to geometric characteristics of different kinds of non-metallic inclusions. Manganese sulphides seem to be rather harmless inclusions for specimens in longitudinal or transversal directions thanks to their low thickness. They become very noxious for specimens taken in through thickness direction because of their high area and sharpness.

Keywords: API steel|sulphide stress cracking|slow strain rate test|microstructure|
No 4 (2006), p. 462-468
  mag14.pdf (745 kB)
mag14_eng.txt (2 kB)  

Kubina T., Schindler I., Turoňová P., Heger M., Franz J., Liška M., Hlisníkovský M.
MATHEMATIC SIMULATION OF THE WEDGE ROLLING TEST AND COMPUTER PROCESSING OF LABORATORY RESULTS
Keywords: wedge rolling test|formability|cracking|computer analysis|FEM|
No 4 (2006), p. 469-476
  mag15.pdf (393 kB)
mag15_eng.txt (2 kB)  

Rusz S., Schindler I., Kubina T., Bořuta J.
A NEW MATHEMATICAL MODEL DETERMINATING THE FORMING FACTOR
Keywords: hot flat rolling|forming factor|torsion test|mean equivalent stress|rolling force|
No 4 (2006), p. 477-483
  mag16.pdf (332 kB)
mag16_eng.txt (2 kB)  

Suchánek P., Schindler I., Kratochvíl P.
SIMPLE MODELS DESCRIBING HOT DEFORMATION RESISTANCE OF SELECTED IRON ALUMINIDES
Keywords: iron aluminides|laboratory hot rolling|rolling force|deformation resistance|
No 4 (2006), p. 484-489
  mag17.pdf (297 kB)
mag17_eng.txt (2 kB)  

Čížek L., Kocich R., Greger M., Praźmowski M., Tański T.
STUDY OF PLASTIC DEFORMATION OF MAGNESIUM ALLOYS WITH GRADUATE ALUMINIUM CONTENT
Keywords: magnesium alloys|mechanical properties|plasticity|heat treatment|metallographic and fracture analysis|
No 4 (2006), p. 490-496
  mag18.pdf (836 kB)
mag18_eng.txt (2 kB)