Search results

1

Influence of Heating Parameters on Flow Stress Curves of Low-Alloy Mn-Ti-B Steel

100%

Kawulok P., Schindler I., Kawulok R., Opěla P., Sedláček R.

Archives of Metallurgy and Materials

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2018

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vol. 63

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issue 4

2

Activation Energy in Hot Forming of Selected Fe-40at.%Al Type Intermetallic Compounds

86%

Schindler I., Kawulok R., Kulveitová H., Kratochvíl P., Šíma V., Knapiński M.

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2012

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vol. 122

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issue 3

610-613

EN

Promising potential of the Fe-40at.%Al type alloys is used only in a limited way as yet, mainly due to their high brittleness. With regard to attraction of the given type material, the plastometric research at temperatures 800C to 1200C was carried out as a basic one, namely using the uniaxial compression tests at strain rates 10^{-2} s^{-1} to 10^1 s^{-1}. Cylindrical samples were manufactured from laboratory castings, gained by means of the vacuum induction furnace. Two materials were tested - Fe-40Al and Fe-40Al+TiB_2. From the measured flow stress curves the values of maximum stress were obtained and used for determination of the activation energy in hot forming according to the classical equation of the hyperbolic sine type. Enumeration of its parameters led to a possibility to predict maximum deformation resistance values of the investigated alloys in dependence on temperature and strain rate. Pronounced effect of the added titanium diboride particles (< 10 μm) on the activation energy value and to a resistance to the formation of cracks was observed. Thanks to the obtained value of activation energy an equation sufficiently describing the initiation of dynamic recrystallization process in the Fe-40Al+TiB_2 material as a function of the Zener-Hollomon parameter could be derived.

3

Study of the Effect of Deformation on Transformation Diagrams of Two Low-Alloy Manganese-Chromium Steels

86%

Kawulok R., Kawulok P., Schindler I., Opěla P., Rusz S., Ševčák V., Solowski Z.

Archives of Metallurgy and Materials

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2018

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vol. 63

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issue 4

4

The Influence of Deformation and Austenitization Temperature on the Kinetics of Phase Transformations During Cooling of High-Carbon Steel

86%

Kawulok P., Podolinský P., Kajzar P., Schindler I., Kawulok R., Ševčák V., Opěla P.

Archives of Metallurgy and Materials

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2018

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vol. 63

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issue 4

5

Hot Formability of Heat-Resistant Stainless Steel X15CrNiSi 20-12

82%

Kawulok R., Schindler I., Navrátil H., Ševčák V., Sojka J., Konečná K., Chmiel B., Kawulok R., Schindler I., Navrátil H., Ševčák V., Sojka J., Konečná K., Chmiel B.

Archives of Metallurgy and Materials

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2020

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vol. 65

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issue 2

6

TRANSFORMATION DIAGRAMS OF SELECTED STEEL GRADES WITH CONSIDERATION OF DEFORMATION EFFECT

73%

Opěla P., Schindler I., Kawulok P., Mizera J., Rusz S., Čmiel K. M., Kawulok R., PODOLÍNSKÝ P., MALIŠ M.

Archives of Metallurgy and Materials

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2018

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vol. 63

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issue 1

7

The Influence of a Cooling Rate on the Evolution of Microstructure and Hardness of the Steel 27MnCrB5

73%

Opěla P., Schindler I., Kawulok P., Mizera J., Rusz S., Kawulok R., Olszar M., Čmiel K. M.

Archives of Metallurgy and Materials

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2018

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vol. 63

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issue 2

8

Optimization Of Laboratory Hot Rolling Of Brittle Fe-40at.%Al-Zr-B Aluminide

73%

Kawulok P., Rusz S., Kawulok R., Opěla P., Jabłońska M., Hadasik E., Schindler I., Kopeček J., Fabík R.

Archives of Metallurgy and Materials

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2015

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issue 3

Refine search results

Influence of Heating Parameters on Flow Stress Curves of Low-Alloy Mn-Ti-B Steel

Activation Energy in Hot Forming of Selected Fe-40at.%Al Type Intermetallic Compounds

Study of the Effect of Deformation on Transformation Diagrams of Two Low-Alloy Manganese-Chromium Steels

The Influence of Deformation and Austenitization Temperature on the Kinetics of Phase Transformations During Cooling of High-Carbon Steel

Hot Formability of Heat-Resistant Stainless Steel X15CrNiSi 20-12

TRANSFORMATION DIAGRAMS OF SELECTED STEEL GRADES WITH CONSIDERATION OF DEFORMATION EFFECT

The Influence of a Cooling Rate on the Evolution of Microstructure and Hardness of the Steel 27MnCrB5

Optimization Of Laboratory Hot Rolling Of Brittle Fe-40at.%Al-Zr-B Aluminide