- Tytuł:
- The effect of σ-phase formation on long-term durability of welding joints in SUPER 304H steels
- Autorzy:
-
Horváth, J.
Král, P.
Janovec, J. - Powiązania:
- https://bibliotekanauki.pl/articles/1112347.pdf
- Data publikacji:
- 2016-10
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
81.70.Jb
68.37.Ma
81.30.Mh
81.20.Vj
62.20.mj - Opis:
- 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/2×10⁴ h). The investigations of the precipitates were focused on the occurrence of σ-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 σ-phase were studied on macroscopic level by color etching method using light optical microscopy. The effect of microstructural changes (σ-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 σ-phase. It was found that the σ-phase distribution is influenced by welding process. The influence of brittle σ-phase on long-term durability of the degraded steel regarding its insufficient impact strength has been discussed.
- Źródło:
-
Acta Physica Polonica A; 2016, 130, 4; 960-962
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł