In the present study, sludge from a steel wastewater treatment plant (SWWTP) was analyzed regarding its physicochemical characteristics and metal contents, and disposal options. For these purposes, grab sampling was used to collect 18 slurry and 18 cake sludge samples in 6 mouth (May-October 2012). Mann-Whitney U test, one sample T-test and Wilcoxon signed rank test were applied to analyze the ...

To understand the origin of cleavage fracture which dominates in Fe Mn -Al-C alloys at a high phosphorus concentration, we performed first-principles study of the phosphorus effect on ideal cleavage energy and critical stress in -carbide, Fe3AlC, a precipitate in the austenitic alloys. We find that phosphorus has higher solubility in Fe3AlC than in -Fe and sharply reduces the cleavage character...

First-principles calculations were performed to study the structural, electronic, and magnetic properties of bcc Fe with C impurities alloyed with 2, 3, and 6 at.% of Mn. Our results reveal that both manganese concentration and carbon location with respect to Mn affect the Fe-Mn magnetic interaction. With an increase in Mn concentration in bcc Fe-Mn alloy, the local magnetic moment of manganese...

Abstract Analytical liquidus equations were evaluated using differential scanning calorimetry (DSC) and thermal analysis (DTA). Results of 180 measurements in the Fe-C-Si-Mn-Al-P subsystems considered, where experimental methodology was demonstrated for four alloys Fe-Si-Mn-Al system. Excellent agreement between DSC/DTA dataset most recently published equation found (error 2.1 ± 1.6 °C). For th...

Effects of ultra high magnetic field of both pulse and steady types on martensitic transformation have been studied, using Fe-Ni-Mn, Fe-Ni-Mn-C alloys with the supplemental tests on Fe-Ni-C and Fe-NiCo-Ti alloys. It is found that the martensitic transformation is induced at room temperature not only athermally but also isothermally either by pulse magnetic field or by steady magnetic field for ...

In this study, Mn-rich Fe-Mn-Al alloys with different Al content (Al = 0, 3, and 5 % by weight) were fabricated from ferromanganese lumps using a conventional powder metallurgy technique. The samples compacted in 1 cm steel dies load of 8 tons then sintered at 1100 °C for 2 h tubular furnace under vacuum condition around 0.5 mbar. To evaluate the effect addition to alloy, Archimedes principle V...