Publication detail

Microstructural Stability of Dissimilar Weld Joint of Creep-Resistant Steels with Increased Nitrogen Content at 500-900stC

ZLÁMAL, B. FORET, R. BURŠÍK, J. SVOBODA, M.

Czech title

Strukturní stabilita heterogenního svarového spoje žárupevných ocelí se zvýšeným obsahem dusíku žíhaného při 500-900stC

English title

Microstructural Stability of Dissimilar Weld Joint of Creep-Resistant Steels with Increased Nitrogen Content at 500-900stC

Type

journal article - other

Language

en

Original abstract

The structural changes taking place in the dissimilar laboratory welds of 6CrMoV 8-3-2 (T25), being under development, and modified X12CrMoVNb 10-1 (P91) nitrided steels annealed at temperatures of 500-900stC have been subject of study. Carbon and nitrogen redistribution measurement by the EPMA method was complemented with detailed structural analysis aimed at the phase profiles and chemical composition of coexisting carbides and carbonitrides in particular regions of the weld joint. Results of experimental work were compared with thermodynamic and kinetic modelling using the DICTRA software. A very good agreement between the modelling and the experiments was observed.

Czech abstract

Předmětem studia byly strukturní změny v heterogennním svarovém spoji nově vyvíjené oceli 6CrMoV 8-3-2 a modifikované X12CrMoVNb 10-1. Obě oceli byly před svařením nitridovány pro zvýšení obsahu dusíku. Po svaření proběhlo žíhání spoje při 500, 600 a 900stC. Redistribuce uhlíku a dusíku měřená vlnově disperzní mikroanalýzou a zjištěné fázové složení byly porovnány s kinetickými simulacemi provedenými s využitím softwaru DICTRA. Mezi experimentem a výpočtem byla pozorována velmi dobrá shoda.

English abstract

The structural changes taking place in the dissimilar laboratory welds of 6CrMoV 8-3-2 (T25), being under development, and modified X12CrMoVNb 10-1 (P91) nitrided steels annealed at temperatures of 500-900stC have been subject of study. Carbon and nitrogen redistribution measurement by the EPMA method was complemented with detailed structural analysis aimed at the phase profiles and chemical composition of coexisting carbides and carbonitrides in particular regions of the weld joint. Results of experimental work were compared with thermodynamic and kinetic modelling using the DICTRA software. A very good agreement between the modelling and the experiments was observed.

Keywords in English

modelling, structural stability, precipitates, weld joint

RIV year

2007

Released

01.03.2007

Publisher

Trans Tech Publications

ISSN

1012-0386

Journal

Defect and Diffusion Forum

Volume

263

Number

3

Pages from–to

195–200

Pages count

6

BIBTEX


@article{BUT44027,
  author="Bronislav {Zlámal} and Rudolf {Foret} and Jiří {Buršík} and Milan {Svoboda},
  title="Microstructural Stability of Dissimilar Weld Joint of Creep-Resistant Steels with Increased Nitrogen Content at 500-900stC",
  journal="Defect and Diffusion Forum",
  year="2007",
  volume="263",
  number="3",
  month="March",
  pages="195--200",
  publisher="Trans Tech Publications",
  issn="1012-0386"
}