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Description
  • Tento výzkum se zaměřuje na dosažení homogenní mikrostruktury slitiny NiMoCr procesem rekrystalizace z různých podmínek deformace za tepla i za studena následované různým procesem žíhání. Rozdílná mikrostruktura může mít za výsledek dobré mechanické vlastnosti za vysokých teplot, jako jsou tažnost, únavová a creepová pevnost. Mikrostrukturní změny byly zkoumány optickým mikroskopem a jsou výsledkem všech testovaných programů. Výsledky ukazují, že homogennost rekrystalizované mikrostruktury silně závisí na množství deformace během tváření za tepla a na délce žíhání. Bylo dokázáno, že homogennost rekrystalizované struktury se zvyšuje s větším stupněm deformace a delším časem žíhání. Dále výsledky naznačují, že rekrystalizovaná struktura povrchové vrstvy byla jemnější než struktura uvnitř vzorku. Toto může být způsobeno rekrystalizací nastalou v blízkosti povrchu vzorku, který je ovlivněn vyšším stupněm deformace a vyššími odvodem tepla. (cs)
  • This research provides an attempt to achieve uniform grain structure by recrystallization process in NiMoCr alloy after different hot- and cold-working application. The changes in microstructure resulting from thermomechanical processing were investigated by optical microscopy. The results showed that homogeneity of the recrystallized structure is strongly related to the amount of sample reduction imposed during hot working and to the period of annealing time. Furthermore, the results illustrate that the recrystallized structure at the surface was finer, than in the interior of the sample. This is due the specimen surface, which is more strain exposed for applied deformation and driving force for primary recrystalization in sample surface area is therefore higher than in central part of samples. Then, using conventional two-step hot rolling, the expected uniform recrystallized microstructure could not be obtained across the width of slab.
  • This research provides an attempt to achieve uniform grain structure by recrystallization process in NiMoCr alloy after different hot- and cold-working application. The changes in microstructure resulting from thermomechanical processing were investigated by optical microscopy. The results showed that homogeneity of the recrystallized structure is strongly related to the amount of sample reduction imposed during hot working and to the period of annealing time. Furthermore, the results illustrate that the recrystallized structure at the surface was finer, than in the interior of the sample. This is due the specimen surface, which is more strain exposed for applied deformation and driving force for primary recrystalization in sample surface area is therefore higher than in central part of samples. Then, using conventional two-step hot rolling, the expected uniform recrystallized microstructure could not be obtained across the width of slab. (en)
Title
  • Effect of Deformation Condition on Structure Development in Nickel Base Alloy
  • Vliv deformačních podmínek na vývoj struktury v niklových slitinách (cs)
  • Effect of Deformation Condition on Structure Development in Nickel Base Alloy (en)
skos:prefLabel
  • Effect of Deformation Condition on Structure Development in Nickel Base Alloy
  • Vliv deformačních podmínek na vývoj struktury v niklových slitinách (cs)
  • Effect of Deformation Condition on Structure Development in Nickel Base Alloy (en)
skos:notation
  • RIV/26316919:_____/07:#0000082!RIV09-GA0-26316919
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • P(GA106/06/1352)
http://linked.open...iv/cisloPeriodika
  • 192-193
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 418888
http://linked.open...ai/riv/idVysledku
  • RIV/26316919:_____/07:#0000082
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • nickel base alloy, NiMoCr alloy (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • NL - Nizozemsko
http://linked.open...ontrolniKodProRIV
  • [9A6D7466E231]
http://linked.open...i/riv/nazevZdroje
  • Journal of Materials Processing Technology
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...vavai/riv/projekt
http://linked.open...UplatneniVysledku
http://linked.open...v/svazekPeriodika
  • 2007
http://linked.open...iv/tvurceVysledku
  • Němeček, Stanislav
  • Kraus, Libor
issn
  • 0924-0136
number of pages
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