Solvus temperature of modified Z-phase in AISI316LN+V+Nb steel

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F16%3A86100125" target="_blank" >RIV/61989100:27360/16:86100125 - isvavai.cz</a>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

Solvus temperature of modified Z-phase in AISI316LN+V+Nb steel

Popis výsledku v původním jazyce

Creep resistance of steels in the field of dislocation creep strongly depends on both thermodynamic and dimensional stability of minor phases. Precipitation of many minor phases in heat resistant steels is now very well documented. But it is not true in the case of some interstitial minor phases in nitrogen-bearing steels. For example, a limited amount of information is available about precipitation of a complex nitride (Nb,V)CrN, so called modified Z-phase, in austenitic steels. This paper deals with the studies on precipitation behaviour of the modified Z-phase in an AISI 316LN steel with vanadium and niobium additions. Thermodynamic equilibrium phases for the steel investigated were calculated using the ThermoCalc software. Furthermore, laboratory annealing of specimens was carried out in the temperature interval from 550 to 1250 oC for times 1, 20 and 50 h. Kinetics of precipitation of the modified Z-phase in the austenitic matrix was fast. Precipitation of this minor phase was observed in the temperature range of 750 - 1050 oC. The solvus temperature corresponded well with the results of thermodynamic calculations. The solvus temperature of the modified Z-phase in the steel investigated was determined to be about 250 oC lower than that calculated for NbCrN type of Z-phase in the AISI 316LN + 0.1Nb austenitic steel.

Název v anglickém jazyce

Solvus temperature of modified Z-phase in AISI316LN+V+Nb steel

Popis výsledku anglicky

Creep resistance of steels in the field of dislocation creep strongly depends on both thermodynamic and dimensional stability of minor phases. Precipitation of many minor phases in heat resistant steels is now very well documented. But it is not true in the case of some interstitial minor phases in nitrogen-bearing steels. For example, a limited amount of information is available about precipitation of a complex nitride (Nb,V)CrN, so called modified Z-phase, in austenitic steels. This paper deals with the studies on precipitation behaviour of the modified Z-phase in an AISI 316LN steel with vanadium and niobium additions. Thermodynamic equilibrium phases for the steel investigated were calculated using the ThermoCalc software. Furthermore, laboratory annealing of specimens was carried out in the temperature interval from 550 to 1250 oC for times 1, 20 and 50 h. Kinetics of precipitation of the modified Z-phase in the austenitic matrix was fast. Precipitation of this minor phase was observed in the temperature range of 750 - 1050 oC. The solvus temperature corresponded well with the results of thermodynamic calculations. The solvus temperature of the modified Z-phase in the steel investigated was determined to be about 250 oC lower than that calculated for NbCrN type of Z-phase in the AISI 316LN + 0.1Nb austenitic steel.

Druh

D - Stať ve sborníku

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

—

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název statě ve sborníku

METAL 2016: conference proceedings : (reviewed version) : 25th Anniversary International Conference on Metallurgy and Materials : May 25th-27th 2016, Hotel Voronez I, Brno, Czech Republic, EU

ISBN

978-80-87294-67-3

ISSN

—

e-ISSN

—

Počet stran výsledku

6

Strana od-do

580-585

Název nakladatele

Tanger

Místo vydání

Ostrava

Místo konání akce

Brno

Datum konání akce

25. 5. 2016

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000391251200092