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The influence of isothermal ageing and subsequent hydrogen charging at room temperature on local mechanical properties and fracture characteristics of martensitic-bainitic weldments for power engineering

SYSNO ASEP	0481131
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	The influence of isothermal ageing and subsequent hydrogen charging at room temperature on local mechanical properties and fracture characteristics of martensitic-bainitic weldments for power engineering
Author(s)	Falat, L. (SK) Čiripová, L. (SK) Homolová, V. (SK) Kroupa, Aleš (UFM-A)_{RID, ORCID}
Number of authors	4
Source Title	Journal of Mining and Metallurgy Section B-Metallurgy - ISSN 1450-5339 Roč. 53, č. 3 (2017), s. 373-382
Number of pages	10 s.
Language	eng - English
Country	RS - Serbia
Keywords	power-plant steels ; dissimilar weld ; thermal exposure
Subject RIV	BJ - Thermodynamics
OECD category	Thermodynamics
Institutional support	UFM-A - RVO:68081723
UT WOS	000417723500028
EID SCOPUS	85032570008
DOI	10.2298/JMMB170515033F
Annotation	The present study deals with the effects of high temperature expositions and subsequent cathodic hydrogen charging of dissimilar martensitic/bainitic weldment on its local mechanical properties and fracture behaviour at room temperature. Circumferential welded joint under investigation was produced by tungsten inert gas welding of X10CrWMoVNb9-2 martensitic and 7CrMoVTiB10-10 bainitic steels tubes with Ni-based filler metal and the application of subcritical postweld heat treatment. Hardness profile measurements revealed pronounced hardness peaks in over-heated regions of the individual steels heat-affected zones which remained preserved also during subsequent expositions at 600°C for up to 5000 hours. Gradual microstructural degradation of these regions included precipitate coarsening and the formation of new secondary phases during thermal exposure. The combined effects of thermal and hydrogen embrittlement of the studied weldment resulted in deleterious effects on its tensile and fracture behaviour.
Workplace	Institute of Physics of Materials
Contact	Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485
Year of Publishing	2018

Number of the records: 1