Abstract
Fe–Al–O-based materials are currently undergoing a great deal of development because of their many special properties. However, lack of strength at high temperatures, limited ductility at ambient temperatures and corrosion resistance have hindered a wider application of these materials. Recently, a new Fe–Al-based oxide precipitation hardened (OPH) steel was developed by the authors to improve the mechanical properties and oxidation resistance. The new OPH alloys are produced by dissolving a specific amount of oxygen in the matrix during mechanical alloying followed by precipitation of fine dispersion of aluminum or yttrium oxides during hot consolidation. A series of tests was performed to evaluate the thermomechanical properties and corrosion resistance in a 3.5% NaCl solution. The results show improved corrosion resistance, as well as mechanical properties, while the production costs of this material are lower than for traditional materials.
Highlights
In a future environmental, ecofriendly energy industry, it will be necessary to develop new structural materials with excellent properties, including corrosion resistance and relevant high temperature strength [1,2,3]
In order to perform the corrosion resistance evaluation of each oxide dispersion strengthened with acetone in an ultrasonic bathwith and rinsed deionized water before theconnected corrosion with tests. a wire, (ODS)
A flat corrosion cell with three electrodes is used for the electrochemical experiments with a saturated calomel electrode (SCE), a platinum electrode, and the test sample is used as a reference, counter and working electrode, respectively
Summary
Ecofriendly energy industry, it will be necessary to develop new structural materials with excellent properties, including corrosion resistance and relevant high temperature strength [1,2,3]. Compared with conventional ferritic/martensitic steels, ODS steels have better mechanical properties (tensile and creep strength) and oxidation resistance, thanks to the high number density of nanosized oxide particles with good thermal stability [9,10,11,12]. Such processing could be improved using a controlled thermomechanical treatment, combined with lowering the content of elements such as O, N and C introduced during. This paper concentrates on the mechanical properties of the new OPH steel with various percentages of Al content, its microstructure and corrosion resistance
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