Journal
Article title
Authors
Title variants
Languages of publication
Abstracts
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.
Discipline
Journal
Year
Volume
Issue
Pages
960-962
Physical description
Dates
published
2016-10
Contributors
author
- CTU in Prague, Faculty of Mechanical Engineering, Department of Materials Engineering, Karlovo náměstí 13, 121 35 Prague, Czech Republic
- UJP PRAHA a.s., Nad Kamínkou 1345, 156 00 Prague, Czech Republic
author
- Institute of Physics of Materials, ASCR v.v.i., Žižkova 22, 616 62 Brno, Czech Republic
author
- CTU in Prague, Faculty of Mechanical Engineering, Department of Materials Engineering, Karlovo náměstí 13, 121 35 Prague, Czech Republic
References
- [1] R. Viswanathan, J.F. Henrey, J. Tanzosh, G. Stanko, J. Shingledecker, B. Vitalis, R. Purgert, J. Mater. Eng. Perform. 14, 281 (2005), doi: 10.1361/10599490524039
- [2] V. Viswanathan, R. Purgert, P. Rawles, Adv. Mater. Process. 2008, 47 (2008) http://www.asminternational.org/news/magazines/am-p/-/journal_content/56/10192/AMP16608P047/PUBLICATION
- [3] P. Duhaj, J. Ivan, E. Makovicky, J. Iron Steel Inst. 206, 1145 (1968)
- [4] C.M. Souza, H.F.G. Abren, S.S.M. Tavares, J.M.A. Rebello, Mater. Character. 59, 1301 (2008)
- [5] J. Barcik, Mater. Sci. Technol. 4, 5 (1988)
- [6] V.K. Sikka, M.G. Cowgill, B.W. Roberts, in: Proc. Topical Conf. on Ferritic Alloys for Use in Nuclear Energy Technologies, ASM International, Snowbird (UT) 1983, p. 675
- [7] C.C. Hsieh, W. Wu, ISRN Metall. 2012, 732471 (2012), doi: 10.5402/2012/732471
- [8] P. Marshall, Austenitic Stainless Steels, Elsevier, England 1984
- [9] Filler Metals for Thermal Power Generation, Boehler-Welding [cit. 2015-10-22] http://www.voestalpine.com/welding/content/download/4889/79628/file/057-2015-EN-GL_Productfolder-ThermalPower_WEB.pdf
- [10] Z. Jonšta, A. Hernas, M. Tvrdý, L. Čížek, J. Purmenský, Creep-resistant steels and alloys, ZUSI Žilina, Žilina 2002, (in Czech
- [11] K.K. Alaneme, S.M. Hong, I. Sen, E. Fleury, U. Ramamurty, Mater. Sci. Eng. A 527, 4600 (2010), doi: 10.1016/j.msea.2010.04.018
- [12] J. Horváth, P. Král, J. Janovec, V. Sklenička, in: Proc. 24th Int. Conf. on Metallurgy and Materials, Tanger Ltd., Ostrava 2015, p. 505
- [13] A. Zieliński, J. Achiev. Mater. Manufact. Eng. 2, 403 (2012)
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv130n440kz