Residual stress analysis in thermally grown oxide scales developed on Nb-alloyed refractory austenitic stainless steels

Ramos, Pedro Augusto; Coelho, Rodrigo Santiago; Soldera, F.; Pinto, Haroldo Cavalcanti; Mücklich, Frank; Brito, Pedro

doi:10.1016/j.corsci.2020.109066

Cited by 9 publications

(1 citation statement)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The edges of the damaged area (marked with red arrows) are neither sharp nor clean, which determines the nature of the spallation and indicates its occurrence at high temperature while the oxidation process occurs. This type of spallation is the result of the growth stresses located within oxides, leading to a rapid increase in the oxidation rate [ 28 , 29 ]. The spallation effects while the isothermal oxidation of the austenitic alloy was at 900 and 950 °C were demonstrated with the thermogravimetric method [ 30 ].…”

Section: Resultsmentioning

confidence: 99%

The Morphology and Microstructure of Oxide Scale Grown on Austenitic Steel during Steam Oxidation at 700 °C for 500 h

et al. 2021

View full text Add to dashboard Cite

The modern power generation industry needs materials able to withstand severe conditions, such as high temperatures, steam pressure, and an aggressive environment, to create more electric power out of a decreasing amount of fuel. Therefore, new metallic materials are continuously being developed. In order to gain knowledge about modern materials, the investigation of high Cr and Ni austenitic steel oxidized in 100% steam at 700 °C for 500 h was performed. The morphology, the phase composition, and the chemical composition of the oxidation products were investigated through methods of advanced electron microscopy techniques. Moreover, precipitates present in bulk material were identified. The material developed a continuous and complex oxide scale, consisting of Fe2O3, Cr2O3, and spinel phases. Very fine MX, fine ε-Cu, and M23C6 precipitates were found in the bulk material. The creation of iron oxide is induced due to the coarse grain size of the material. Cr2O3 forms due to the internal oxidation process.

show abstract

Section: Resultsmentioning

confidence: 99%