Weld joint simulations of heat-resistant steels

J 2004

Weld joint simulations of heat-resistant steels

SOPOUŠEK, Jiří, Vít JAN a Rudolf FORET

Základní údaje

Originální název

Weld joint simulations of heat-resistant steels

Název česky

Simulace svarových spojů v žáropevných ocelích.

Autoři

SOPOUŠEK, Jiří (203 Česká republika, garant), Vít JAN (203 Česká republika) a Rudolf FORET (203 Česká republika)

Vydání

Archives of Metallurgy and Materials, Warszawa - Krakow, Polish Academy of Sciences, 2004, 1733-349

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10403 Physical chemistry

Stát vydavatele

Polsko

Utajení

není předmětem státního či obchodního tajemství

Kód RIV

RIV/00216224:14310/04:00011683

Organizační jednotka

Přírodovědecká fakulta

UT WoS

000224772200004

Klíčová slova anglicky

phase profile carbon redistribution electrode weld DICTRA

Změněno: 22. 11. 2004 14:37, prof. RNDr. Jiří Sopoušek, CSc.

Anotace

ORIG CZ

V originále

Knowledge of microstructure stability is essential for reliable estimations of the lifetime limitations of materials and welded joints at higher temperatures. The CALPHAD method complemented with appropriate diffusion approach can help us to simulate phase and element profile evolutions inside diffusion-affected zone of weld joint. The different heat-resistant steels (alloying base: Cr, Ni, Mo, V, C, N) and their weld joints are objects of our study. The particular results of the equilibrium calculations are presented as phase diagram cross-sections and element activities of the selected heat-resistant steels. The carbon and nitrogen activity temperature dependences were calculated for individual steels. The difference in these activities in two different steels (at given temperature) indicates diffusion flow direction, which can be opposite then deduced from the element content (up-hill diffusion). The simulations respect the coexistence of different carbide phases in the materials and they are conducted on the assumption that local phase equilibrium holds and that diffusion is the control process of phase transformation. The phase diagram calculations and diffusion couple simulations involving time-distance dependences for phase and element redistributions in diffusion-affected zones enabled us to obtain basic information, which allow estimating thermodynamic and diffusion stabilities of the studied heat-resistant steels and their weld joints.

Česky

metodou CALPHAD doplněnou o příslušný popis difúzně řízených dějů je simulován vývoj profilů chemického a fázového složení v žáropevných ocelích na bázi Fe, Cr, Ni, Mo, V, C, N a jejich svarech. Jsou presentovány predikce fázových diagramů, závislosti aktivity uhlíku a dusíku na teplotě a similované profiy. Obsah je doplněn o up-hill difúzi uhlíku.

Návaznosti

GA106/03/0636, projekt VaV

Název: Teoretické modelování a experimentální studium strukturní stability moderních žárupevných ocelí a jejich svarů

Citovat

SOPOUŠEK, Jiří, Vít JAN a Rudolf FORET. Weld joint simulations of heat-resistant steels. Archives of Metallurgy and Materials. Warszawa - Krakow: Polish Academy of Sciences, 2004, roč. 49, č. 3, s. 469-480. ISSN 1733-349.

@article{561402,
   author = {Sopoušek, Jiří and Jan, Vít and Foret, Rudolf},
   article_location = {Warszawa - Krakow},
   article_number = {3},
   keywords = {phase profile carbon redistribution electrode weld DICTRA},
   language = {eng},
   issn = {1733-349},
   journal = {Archives of Metallurgy and Materials},
   title = {Weld joint simulations of heat-resistant steels},
   volume = {49},
   year = {2004}
}

TY  - JOUR
ID  - 561402
AU  - Sopoušek, Jiří - Jan, Vít - Foret, Rudolf
PY  - 2004
TI  - Weld joint simulations of heat-resistant steels
JF  - Archives of Metallurgy and Materials
VL  - 49
IS  - 3
SP  - 469-480
EP  - 469-480
PB  - Polish Academy of Sciences
SN  - 1733349
KW  - phase profile carbon redistribution electrode weld DICTRA
N2  - Knowledge of microstructure stability is essential for reliable estimations of the lifetime limitations of materials and welded joints at higher temperatures. The CALPHAD method complemented with appropriate diffusion approach can help us to simulate phase and element profile evolutions inside diffusion-affected zone of weld joint. The different heat-resistant steels (alloying base: Cr, Ni, Mo, V, C, N) and their weld joints are objects of our study. The particular results of the equilibrium calculations are presented as phase diagram cross-sections and element activities of the selected heat-resistant steels. The carbon and nitrogen activity temperature dependences were calculated for individual steels. The difference in these activities in two different steels (at given temperature) indicates diffusion flow direction, which can be opposite then deduced from the element content (up-hill diffusion). The simulations respect the coexistence of different carbide phases in the materials and they are conducted on the assumption that local phase equilibrium holds and that diffusion is the control process of phase transformation. The phase diagram calculations and diffusion couple simulations involving time-distance dependences for phase and element redistributions in diffusion-affected zones enabled us to obtain basic information, which allow estimating thermodynamic and diffusion stabilities of the studied heat-resistant steels and their weld joints.
ER  -

SOPOUŠEK, Jiří, Vít JAN a Rudolf FORET. Weld joint simulations of heat-resistant steels. \textit{Archives of Metallurgy and Materials}. Warszawa - Krakow: Polish Academy of Sciences, 2004, roč.~49, č.~3, s.~469-480. ISSN~1733-349.

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