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Plastic properties of steel AISI 4140 influenced by strain rate and temperature

Identifikátory výsledku

  • Kód výsledku v IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F18%3A10241088" target="_blank" >RIV/61989100:27360/18:10241088 - isvavai.cz</a>

  • Výsledek na webu

  • DOI - Digital Object Identifier

Alternativní jazyky

  • Jazyk výsledku

    angličtina

  • Název v původním jazyce

    Plastic properties of steel AISI 4140 influenced by strain rate and temperature

  • Popis výsledku v původním jazyce

    Deformation behavior of continuously cast steel with 0.43 % C, 1.01 % Cr and 0.19 % Mo was studied in the austenite region. Its solidus temperature was calculated as 1435 oC and the nil strength temperature at heating was determined as 1402 oC using a special testing method. Hot ductility was measured by means of the uniaxial tensile tests in wide range of mean strain rate (0.00074 - 63 s-1) and temperature (800 - 1375 oC). At medium strain rate of 0.65 s-1, formability steadily increased to a temperature of approx. 1335 oC and then sharply dropped as a result of overheating and burning of the steel. The nil ductility temperature was determined as 1365 oC in this case. Influence of strain rate on formability was evaluated at two temperature values corresponding to relatively poor and/or good plastic properties. At a temperature of 900 oC, ductility increased rather moderately with the increasing strain rate. At a temperature of 1280 oC, the growth of ductility at increasing strain rate was sharper and both dependencies intersected at a strain rate of approx. 0.008 s-1. Formability was improved by higher temperature at high strain rates and deteriorated at very low strain rates, which is a quite unique result. It was not possible to determine the value of the strain rate corresponding to the local maximum of ductility, even if applying the strain rate range of 6 orders. SEM analysis of the broken samples confirmed the expected influence of microstructure development on hot formability.

  • Název v anglickém jazyce

    Plastic properties of steel AISI 4140 influenced by strain rate and temperature

  • Popis výsledku anglicky

    Deformation behavior of continuously cast steel with 0.43 % C, 1.01 % Cr and 0.19 % Mo was studied in the austenite region. Its solidus temperature was calculated as 1435 oC and the nil strength temperature at heating was determined as 1402 oC using a special testing method. Hot ductility was measured by means of the uniaxial tensile tests in wide range of mean strain rate (0.00074 - 63 s-1) and temperature (800 - 1375 oC). At medium strain rate of 0.65 s-1, formability steadily increased to a temperature of approx. 1335 oC and then sharply dropped as a result of overheating and burning of the steel. The nil ductility temperature was determined as 1365 oC in this case. Influence of strain rate on formability was evaluated at two temperature values corresponding to relatively poor and/or good plastic properties. At a temperature of 900 oC, ductility increased rather moderately with the increasing strain rate. At a temperature of 1280 oC, the growth of ductility at increasing strain rate was sharper and both dependencies intersected at a strain rate of approx. 0.008 s-1. Formability was improved by higher temperature at high strain rates and deteriorated at very low strain rates, which is a quite unique result. It was not possible to determine the value of the strain rate corresponding to the local maximum of ductility, even if applying the strain rate range of 6 orders. SEM analysis of the broken samples confirmed the expected influence of microstructure development on hot formability.

Klasifikace

  • Druh

    D - Stať ve sborníku

  • CEP obor

  • OECD FORD obor

    20501 - Materials engineering

Návaznosti výsledku

  • Projekt

    <a href="/cs/project/LO1203" target="_blank" >LO1203: Regionální materiálově technologické výzkumné centrum - Program udržitelnosti</a><br>

  • Návaznosti

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Ostatní

  • Rok uplatnění

    2018

  • Kód důvěrnosti údajů

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Údaje specifické pro druh výsledku

  • Název statě ve sborníku

    METAL 2018 : conference proceedings : reviewed version : 27th International Conference on Metallurgy and Materials : May 23rd-25th 2018, Hotel Voronez I, Brno, Czech Republic, EU

  • ISBN

    978-80-87294-84-0

  • ISSN

  • e-ISSN

    neuvedeno

  • Počet stran výsledku

    6

  • Strana od-do

    401-406

  • Název nakladatele

    Tanger

  • Místo vydání

    Ostrava

  • Místo konání akce

    Brno

  • Datum konání akce

    23. 5. 2018

  • Typ akce podle státní příslušnosti

    WRD - Celosvětová akce

  • Kód UT WoS článku