Detail publikace

EVALUATION OF MICROSTRUCTURAL STABILITY OF CREEP-RESISTANT STEELS WELD JOINTS ON THE BASIS OF A COMPUTATIONAL MODELING

ŠOHAJ, P. JAN, V. DVOŘÁČEK, O.

Anglický název

EVALUATION OF MICROSTRUCTURAL STABILITY OF CREEP-RESISTANT STEELS WELD JOINTS ON THE BASIS OF A COMPUTATIONAL MODELING

Typ

Stať ve sborníku v databázi WoS či Scopus

Jazyk

en

Originální abstrakt

The paper presents results of study of structural stability of creep-resistant steels P24, P22, P91 and their weld joints P24/P22 and P22/P91. The microstructural changes during annealing at temperatures of 500-900 C / 16-1000 hours were examined. During high temperature exposure of the weld joints, carbon diffuses in the direction of its chemical potential gradient and carbon enriched and carbon depleted zones are formed in the weld interface area. In case of P24/P22 joint the P22 steel is carburised, in case of P22/P91 joint, P91 steel is carburised. Redistribution of carbon also affects changes of mechanical properties in the weld interface area. Calculations of phase diagrams shape, phase composition, weight and volume fractions minor phases and temperature dependence of carbon activity were performed using the Thermo-Calc software. Software DICTRA was used for simulations of diffusion redistribution of carbon across the welds. These calculations were used for theoretical predictions of expectable behaviour of investigated materials and welds during their long time high temperature exploitation. These were consequently verified by structural and phase analysis of investigated samples.

Klíčová slova anglicky

Microstructural stability, creep-resistant steel, weld joint, Thermo-Calc

Vydáno

2010-05-18

Nakladatel

TANGER LTD

Místo

Ostrava

ISBN

978-80-87294-17-8

Kniha

METAL 2010: 19TH INTERNATIONAL METALLURGICAL AND MATERIALS CONFERENCE

Strany od–do

403–408

Počet stran

6

BIBTEX


@inproceedings{BUT29055,
  author="Pavel {Šohaj} and Vít {Jan} and Ondřej {Dvořáček}",
  title="EVALUATION OF MICROSTRUCTURAL STABILITY OF CREEP-RESISTANT STEELS WELD JOINTS ON THE BASIS OF A COMPUTATIONAL MODELING",
  booktitle="METAL 2010: 19TH INTERNATIONAL METALLURGICAL AND MATERIALS CONFERENCE",
  year="2010",
  series="2010",
  pages="403--408",
  publisher="TANGER LTD",
  address="Ostrava",
  isbn="978-80-87294-17-8"
}