[Kovove materialy - Metallic materials]
    Thu - November 15, 2018 - 13:17 No. of hits : 975168 ISSN 1338-4252 (online) ISSN 0023-432X (printed)
© Institute of Materials and Machine Mechanics, Slovak Academy of Sciences, Bratislava, Slovak Republic

VOLUME 55 (2017), Issue 2

Microstructure evolution of P92 steel weld metal after service for 8000 h
ZHANG, J., DU, B. SH., LI, X. M., QIN, G. L., ZOU, Y.
vol. 55 (2017), no. 2, pp. 115 - 121

Microstructure characterization and impact toughness test were performed on the P92 steel weld metal which was sectioned from the component of the main steam pipe of an ultra- supercritical unit after 8000 h exposure at high temperature. Precipitates of M23C6, MX, and Laves phase were detected in the weld metal. The weld metal after long-term service possessed much lower impact toughness compared with the as-fabricated weld metal. Micro-cracks were also found in the weld metal which formed during the welding process. Impact toughness reduction in the weld metal was correlated with the microstructure evolution.

Key words
P92 steel, weld metal, microstructure, impact toughness, precipitates

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Full title of this journal is bilingual: Kovové materiály - Metallic Materials.
The official abbreviation in accordance with JCR ISI is Kovove Mater.

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