Analysis of solidification microstructures during wedge-casting
| Autor: | J. H. Perepezko, K. Hildal |
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| Rok vydání: | 2006 |
| Předmět: | |
| Zdroj: | Philosophical Magazine. 86:3681-3701 |
| ISSN: | 1478-6443 1478-6435 |
| DOI: | 10.1080/14786430500404116 |
| Popis: | Solidification microstructure evolution is a function of both alloy composition and thermal history. With a wedge-shaped mold, castings can be subjected to a range of cooling rates differing by orders of magnitude, typically 101–103 K/s, in a single run. Combining microstructure analysis, temperature measurements of the quenching melt and heat transfer analysis, wedge casting is an effective and flexible technique to explore the spectrum of alloy solidification microstructures. The utility of the wedge-casting technique is, in the current study, developed to examine bulk glass-forming alloys by combining multiple thermal probes with a measurement-based kinetics analysis of the phase selection competition and critical cooling rate conditions. Based upon direct thermal measurements, microstructural analysis and kinetics modelling, it is evident that the usual report of a single critical cooling rate for bulk glass formation should be modified to include a critical cooling rate range in order to account for ... |
| Databáze: | OpenAIRE |
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