The Effect of sigma -Phase Formation on Long-Term Durability of Welding Joints in SUPER 304H Steels

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F16%3A00304563" target="_blank" >RIV/68407700:21220/16:00304563 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.12693/APhysPolA.130.960" target="_blank" >http://dx.doi.org/10.12693/APhysPolA.130.960</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.12693/APhysPolA.130.960" target="_blank" >10.12693/APhysPolA.130.960</a>

Result language
angličtina
Original language name
The Effect of sigma -Phase Formation on Long-Term Durability of Welding Joints in SUPER 304H Steels
Original language description
Article presents results on the analysis of secondary phases formed in the medium-term static isothermal ageing welding joints of a SUPER 304H (675°C/2.10x4 h). The investigations of the precipitates were focused on the occurrence ofsigma-phase because its formation leads to significant deterioration of mechanical properties. The microstructure was investigated on microscopic level by scanning/transmission electron microscopy. The distribution and quantification of brittle sigma-phase were studied on macroscopic level by color etching method using light optical microscopy. The effect of microstructural changes (sigma-phase formation) on the impact strength of an aged base material was investigated. For comparison impact tests on received state material were also performed. The results showed that long-term ageing led to the significant reduction of impact strength as a result of the formation of the sigma-phase. It was found that the sigma-phase distribution is influenced by welding process. The influence of brittle sigma-phase on long-term durability of the degraded steel regarding its insufficient impact strength has been discussed.
Czech name
—
Czech description
—

Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
JG - Metallurgy, metal materials
OECD FORD branch
—

Project
<a href="/en/project/LO1207" target="_blank" >LO1207: Support of Sustainability of the Innovation Centre of Diagnostics and Applications of Materials at CTU-FME in Prague</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Similar results(10)