Nodule count effect on microstructure and mechanical properties of hypo-eutectic ADI alloyed with nickel
| Autor: | G. Reyes-Castellanos, José A. Romero-Serrano, R.G. Sánchez-Alvarado, Alejandro Cruz-Ramírez, E. Colin-García, V. H. Gutiérrez-Pérez |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Austenite
Nodule (geology) lcsh:TN1-997 ductile iron Materials science Metallurgy Metals and Alloys engineering.material Geotechnical Engineering and Engineering Geology Microstructure nickel Brinell scale Mechanics of Materials Ductile iron Ultimate tensile strength process window Materials Chemistry engineering adi Austempering nodule count lcsh:Mining engineering. Metallurgy Eutectic system |
| Zdroj: | Journal of Mining and Metallurgy. Section B: Metallurgy, Vol 57, Iss 1, Pp 115-124 (2021) |
| ISSN: | 2217-7175 1450-5339 |
| Popis: | Samples of ductile iron alloyed with 0.88 % Ni with a nodule count of 606, 523, and 290 nod/mm2 were obtained from sand cast plates of different thickness in the range from 8.46 to 25.4 mm. The effect of the nodule count was evaluated during the austempering process held at 285?C and austempering times of 15, 30, 45, 60, 70, and 90 min. The volume fraction of high carbon austenite increased when the nodule count increased, however, the carbon content of the high carbon austenite kept almost constant. The process window was narrow, requiring a lower austempering time when the nodule count increased. The combination of a higher nodule count and low austempering temperature allowed obtaining a fine ausferritic microstructure which led to higher Brinell hardness and tensile strength. The process window was determined by XRD measurements and it was in good agreement with the microstructural and hardness evolution as the austempering time increased. |
| Databáze: | OpenAIRE |
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