Showing papers by "Hossein Beladi published in 2023"
TL;DR: In this paper , the development of γ-fibre texture in IF-steel through static recrystallisation alters the distribution of grain boundary misorientations and plane orientations.
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TL;DR: In this article , the effect of Ti-Mo alloying on the microstructural evolution and superplastic deformation behavior of Fe-5.6Mn-1.1Al-0.2C steels was investigated.
TL;DR: In this paper , the effect of vacancies on the evolution of strain-induced NbC precipitates was studied in a model austenitic Fe-30Ni-0.1C steel deformed at 925°C.
Abstract: ABSTRACT The effect of vacancies on the evolution of strain-induced NbC precipitates (SIP) was studied in a model austenitic Fe–30Ni–0.1Nb-0.1C steel deformed at 925 °C. Precipitation growth and coarsening characteristics have been investigated in detail by employing high resolution transmission electron microscopy. In general, the SIP preferentially nucleated on the nodes of the periodic dislocation networks constituting microband walls and grew over the varying holding time following the conventional precipitation growth and coarsening theory. Nevertheless, the current results demonstrated unexpected sluggishness in the process of growth and coarsening of the precipitates on the introduction of intermediary population of vacancies by a quenching step added in the thermomechanical processing schedules. It has been suggested that the formation of stable vacancy-solute complexes may reduce the effective availability of solutes for the precipitate growth. GRAPHICAL ABSTRACT
TL;DR: In this article , sputtered titanium (Ti)-cerium (Ce) bimetallic oxides were developed by facile electrochemical anodisation to fabricate crystalline nanoporous photocatalysts responded under a visible light region.
Abstract: Visible-light responsive heterojunctions exhibited unique performance in environmental remediation due to their ability to form complexes with various Lewis bases and a synergetic effect between their constituents. However, the photocatalytic activities of those composites are significantly restricted by low contact between two semiconductors or pore blockage through impregnation. To address these issues, this study introduces sputtered titanium (Ti)-cerium (Ce) bimetallic oxides, developed by facile electrochemical anodisation to fabricate crystalline nanoporous photocatalysts responded under a visible light region. The deposited Ti-Ce islands and their underlying layer were anodised to develop a unique porous structure with a diameter of ∼61 nm. After annealing, the fabricated bimetallic oxides formed crystalline phases and promoted Ti-Ce interfacial contact by decreasing the Ce3+ concentration followed by its higher specific surface area. The photocatalytic activities of Ti-Ce bimetallic oxides were improved by increasing the Ce sputtering power due to promoted Ti-Ce interfacial contact from one side and the transformation of valence state between Ce3+ and Ce4+ from the other. This resulted in the photodegradation efficiency of the heterostructure with the highest loading of the dopant reaching 83% under simulated solar irradiation. The novel heterojunctions prepared in this study with their fascinating performances can be utilised as advanced photocatalysts for many environmental applications.
TL;DR: In this article , the effect of processing route (casting versus iterative recrystallisation) on the texture and grain boundary network characteristics (i.e., population, plane orientation and connectivity) of an austenitic Ni30Fe alloy has been determined.