Microstructural evolution and thermal stability of Fe–Zr metastable alloys developed by mechanical alloying followed by annealing
| Autor: | S. Sooraj, Carl C. Koch, V.M. Suntharavel Muthaiah, Pengchao Kang, Suhrit Mula |
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| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Materials science Annealing (metallurgy) Metallurgy 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Indentation hardness Gibbs free energy symbols.namesake Transmission electron microscopy 0103 physical sciences X-ray crystallography symbols Thermal stability Crystallite 0210 nano-technology Solid solution |
| Zdroj: | Philosophical Magazine. 96:2649-2670 |
| ISSN: | 1478-6443 1478-6435 |
| DOI: | 10.1080/14786435.2016.1212173 |
| Popis: | The effect of Zr (up to 1 at.%) addition on the formation of Fe–Zr metastable alloys and their thermal stability were investigated for their possible nuclear applications. Fe–xZr (x = 0.25, 0.5, 1%) alloys were synthesised by mechanical alloying under a high-purity argon atmosphere using stainless steel grinding media in a SPEX 8000M high energy mill. The milling was conducted for 20 h with a ball-to-powder weight ratio of 10:1. The formation of metastable solid solutions after milling was confirmed from the change in the Gibbs free energy analysis as per Miedema’s model. The microstructural characterisation was carried out by analysis of X-ray diffraction, atomic force microscopy and transmission electron microscopy. The effect of Zr on the thermal stability of Fe–Zr alloys was investigated by extensive annealing experiments followed by microstructural analysis and microhardness measurements. The stabilisation was found to occur at 800 °C and thereafter, no significant change in the crystallite s... |
| Databáze: | OpenAIRE |
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