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@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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