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| rdf:type
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| Description
| - The study of hydrogen effect on mechanical properties was carried out on samples of IN738LC superalloy. Two ensembles of tensile specimens in the heat treated state were prepared: hydrogen-charged and without hydrogen treatment. The hydrogenation was performed at 800 oC for 4 hours in flowing hydrogen gas. Tensile tests were realized on both ensembles of samples with a strain rate of 5.8 x 10-5 s-1. The yield strength and tensile stress of the superalloy samples non-hydrogenated reached the average values of 717 - 9 MPa and 800 - 18 MPa, respectively. The hydrogen effect resulted in a rise of the average values of yield strength as well as of tensile stress to 800 - 55 MPa and 843 - 32 MPa, respectively. The hydrogen content in two selected specimens was measured using LECO RH600 analyzer and the values of 47.6 and 71.4 ppm of hydrogen were determined. Metallographic and fractographic studies as well as microanalysis of selected specimens were carried out after tensile testing. Casting defects were observed in the microstructure using light microscopy. These imperfections influenced the fluctuation of tensile ultimate stress values of non-hydrogenated samples. An EDS phase analysis of superalloy microstructure was performed. Feature of fracture surfaces of the non-hydrogenated as well as hydrogenated tensile test specimens was investigated by means of SEM JEOL JSM-6490LV. Hydrogen was found to affect the mode of fracture of superalloy samples. The fracture surfaces exhibited an increased amount of intergranular fracture due to the dissolved hydrogen, in case of transgranular cracking it was possible to observe a change on the fracture pattern from quasi-cleavage to cleavage one with more secondary cracks that were greater in order.
- The study of hydrogen effect on mechanical properties was carried out on samples of IN738LC superalloy. Two ensembles of tensile specimens in the heat treated state were prepared: hydrogen-charged and without hydrogen treatment. The hydrogenation was performed at 800 oC for 4 hours in flowing hydrogen gas. Tensile tests were realized on both ensembles of samples with a strain rate of 5.8 x 10-5 s-1. The yield strength and tensile stress of the superalloy samples non-hydrogenated reached the average values of 717 - 9 MPa and 800 - 18 MPa, respectively. The hydrogen effect resulted in a rise of the average values of yield strength as well as of tensile stress to 800 - 55 MPa and 843 - 32 MPa, respectively. The hydrogen content in two selected specimens was measured using LECO RH600 analyzer and the values of 47.6 and 71.4 ppm of hydrogen were determined. Metallographic and fractographic studies as well as microanalysis of selected specimens were carried out after tensile testing. Casting defects were observed in the microstructure using light microscopy. These imperfections influenced the fluctuation of tensile ultimate stress values of non-hydrogenated samples. An EDS phase analysis of superalloy microstructure was performed. Feature of fracture surfaces of the non-hydrogenated as well as hydrogenated tensile test specimens was investigated by means of SEM JEOL JSM-6490LV. Hydrogen was found to affect the mode of fracture of superalloy samples. The fracture surfaces exhibited an increased amount of intergranular fracture due to the dissolved hydrogen, in case of transgranular cracking it was possible to observe a change on the fracture pattern from quasi-cleavage to cleavage one with more secondary cracks that were greater in order. (en)
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| Title
| - Hydrogen effect on mechanical properties of IN738LC superalloy
- Hydrogen effect on mechanical properties of IN738LC superalloy (en)
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| skos:prefLabel
| - Hydrogen effect on mechanical properties of IN738LC superalloy
- Hydrogen effect on mechanical properties of IN738LC superalloy (en)
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| skos:notation
| - RIV/61989100:27360/11:86081264!RIV12-MSM-27360___
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
| - P(ED0040/01/01), Z(MSM6198910013)
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| http://linked.open...vai/riv/dodaniDat
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| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
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| http://linked.open...ai/riv/idVysledku
| - RIV/61989100:27360/11:86081264
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| http://linked.open...riv/jazykVysledku
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| http://linked.open.../riv/klicovaSlova
| - yield strength; superalloys; hydrogen embrittlement (en)
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| http://linked.open.../riv/klicoveSlovo
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...v/mistoKonaniAkce
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| http://linked.open...i/riv/mistoVydani
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| http://linked.open...i/riv/nazevZdroje
| - 20th Anniversary International Conference on Metallurgy and Materials: METAL 2011
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| http://linked.open...in/vavai/riv/obor
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| http://linked.open...ichTvurcuVysledku
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| http://linked.open...cetTvurcuVysledku
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| http://linked.open...vavai/riv/projekt
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| http://linked.open...UplatneniVysledku
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| http://linked.open...iv/tvurceVysledku
| - Jonšta, Petr
- Juřica, Jan
- Konečná, Kateřina
- Losertová, Monika
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| http://linked.open...vavai/riv/typAkce
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| http://linked.open.../riv/zahajeniAkce
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| http://linked.open...n/vavai/riv/zamer
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| number of pages
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| http://purl.org/ne...btex#hasPublisher
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| https://schema.org/isbn
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| http://localhost/t...ganizacniJednotka
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