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    Wyświetlanie 1-6 z 6
    Tytuł:
    Martensite Content of Cold-Worked AISI 304L Chromium-Nickel Austenitic Steel
    Autorzy:
    Opiekun, Z. A.
    Pająk, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/379888.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    austenitic stainless steel
    longitudinal rolling
    martensitic phase
    stal austenityczna
    walcowanie wzdłużne
    faza martenzytyczna
    Opis:
    The paper presents the effect of plastic strain occurring at room temperature in annealed samples of AISI 304L austenitic chromium-nickel steel on content of strain-induced &alpha′ martensite in its structure. The strain was introduced by longitudinal rolling of the samples with constant strain rate of about 300 mm/s and relative cold work ranging from 5% to 90% It has been demonstrated that the share of &alpha′ martensite in microstructure of the steel determined by means of Feritscope FMP30 depends on the degree of cold work.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 1 spec.; 155-158
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Corrosion of AlSi 304L Austenitic Stainless Steel in Non-Stationary Aqueous HCl + NaCl Solution
    Autorzy:
    Opiekun, Z. A.
    Orłowicz, A. W.
    Kupiec, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/383327.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    austenitic stainless steel
    structures
    hardness
    microhardness
    stress
    corrosion
    stal austenityczna
    struktury
    twardość
    mikrotwardość
    naprężenie
    korozja
    Opis:
    The paper describes the process of stress corrosion in a Ø50 mm rod made of AISI 304L austenitic chromium-nickel steel. Discs cut off from the steel rod were moved at a speed of 1.25 m/s for a test period of 408 h in a corrosive environment of aqueous solution containing 3% HCl and 8.6 g NaCl at room temperature. It was found that deepest cracks and irregular pitting occurred locally in areas of microstructure containing grains of hard lamellar &alpha' martensite and along boundaries between filamentary delta ferrite (Feδ) precipitates and &alpha′ phase. The corrosion developed in a trans-crystalline manner with branches propagating along boundaries of lamellar &alpha′ phase grains.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 1 spec.; 165-168
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Microstructural and Mechanical Characterization of Solidified Austenitic Stainless Steels
    Autorzy:
    Celik, A. G.
    Polat, S.
    Atapek, S. H.
    Haidemenopoulos, G. N.
    Powiązania:
    https://bibliotekanauki.pl/articles/380707.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    theory of crystallization
    Thermo-Calc
    metallography
    microstructure
    tribology
    stal nierdzewna
    stal austenityczna
    zestalenie
    badanie mikrostrukturalne
    badanie trybologiczne
    oprogramowanie
    Opis:
    Among the family of stainless steels, cast austenitic stainless steels (CASSs) are preferably used due to their high mechanical properties and corrosion resistance. These steels owe their properties to their microstructural features consisting of an austenitic matrix and skeletal or lathy type δ-ferrite depending on the cooling rate. In this study, the solidification behavior of CASSs (304L and 316L grades) was studied using ThermoCalc software in order to determine the solidification sequence and final microstructure during cooling. Theoretical findings were supported by the microstructural examinations. For the mechanical characterization, not only hardness measurements but also tribological studies were carried out under dry sliding conditions and worn surfaces were examined by microscopy and 3D profilometric analysis. Results were discussed according to the type and amount of microstructural features.
    Źródło:
    Archives of Foundry Engineering; 2017, 17, 3; 163-167
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Martensite Content and Mechanical Properties of Uniaxial Tension AlSi 304L Steel
    Autorzy:
    Opiekun, Z. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/383243.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    austenitic steel
    uniaxial tension
    martensite phase
    mechanical properties
    stal austenityczna
    naprężenie jednoosiowe
    faza martenzytyczna
    właściwości mechaniczne
    Opis:
    The paper presents the effect of plastic strain occurring at room temperature in annealed samples of AlSi 304L austenitic chromium-nickel steel on content of strain-induced α′ martensite in its structure. The strain was introduced by uniaxial tension with constant strain rate of about 0.083 mm/s. It has been demonstrated that the share of &alpha′ martensite in microstructure of the steel determined by means of Feritscope FMP30 in the time at uniaxial tension.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 1 spec.; 151-154
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Prediction of Ferrite Content in Austenitic Cr-Ni Steel Castings During Production
    Autorzy:
    Senberger, J.
    Pernica, V.
    Kana, V.
    Zadera, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/380650.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    solidification
    metallography
    austenitic steel
    austenite
    ferrite
    DeLong diagram
    krzepnięcie
    metalografia
    stal austenityczna
    austenit
    ferryt
    diagram DeLong
    Opis:
    Determination of the ferrite content in austenitic steels, which solidified under defined conditions. Ferrite content in austenitic matrix was determined from samples with wall thickness of 60 mm. Measured ferrite contents served to propose the regression equations for the calculation of the ferrite content in steels with Cr content of 18 up to 22 % and Ni of 9 up to 11 %. An additional regression equation was proposed for steels with a higher Ni content. The proposed regression equations have been checked up on the operating melts. In conclusion, the ferrite content in the axis of the casting of wall thickness of 500 mm has been calculated and it was compared to the ferrite determined in the usual way from the cast-on test.
    Źródło:
    Archives of Foundry Engineering; 2018, 18, 3; 91-94
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of Microstructure Images Referred to Percolation Theory
    Autorzy:
    Trzaskowski, W.
    Sobaszek, W.
    Myszka, D.
    Świłło, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/381165.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    percolation theory
    austenitic structure
    ferritic structure
    duplex steel
    ADI
    image analysis
    cluster analysis
    teoria perlokacji
    struktura austenityczna
    struktura ferrytyczna
    stal duplex
    analiza obrazu
    analiza skupień
    Opis:
    The paper discusses possible applications of the percolation theory in analysis of the microstructure images of polycrystalline materials. Until now, practical use of this theory in metallographic studies has been an almost unprecedented practice. Observation of structures so intricate with the help of this tool is far from the current field of its application. Due to the complexity of the problem itself, modern computer programmes related with the image processing and analysis have been used. To enable practical implementation of the task previously established, an original software has been created. Based on cluster analysis, it is used for the determination of percolation phenomena in the examined materials. For comparative testing, two two-phase materials composed of phases of the same type (ADI matrix and duplex stainless steel) were chosen. Both materials have an austenitic - ferritic structure. The result of metallographic image analysis using a proprietary PERKOLACJA.EXE computer programme was the determination of the content of individual phases within the examined area and of the number of clusters formed by these phases. The outcome of the study is statistical information, which explains and helps in better understanding of the planar images and real spatial arrangement of the examined material structure. The results obtained are expected to assist future determination of the effect that the internal structure of two-phase materials may have on a relationship between the spatial structure and mechanical properties.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 1; 109-112
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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