التفاصيل البيبلوغرافية
| العنوان: |
Effect of pearlitic and bainitic initial microstructure on cementite spheroidization in rail steels |
| المؤلفون: |
Henrique Boschetti Pereira, Edwan Anderson Ariza Echeverri, Dany Michell Andrade Centeno, Samuel da Silva de Souza, Luiz Felipe Bauri, Marcos Dorigão Manfrinato, Mohammad Masoumi, Luiz Henrique Dias Alves, Helio Goldenstein |
| المصدر: |
Journal of Materials Research and Technology, Vol 23, Iss , Pp 1903-1918 (2023) |
| بيانات النشر: |
Elsevier, 2023. |
| سنة النشر: |
2023 |
| المجموعة: |
LCC:Mining engineering. Metallurgy |
| مصطلحات موضوعية: |
Rail steel, Spheroidization, Bainite, Pearlite, Mining engineering. Metallurgy, TN1-997 |
| الوصف: |
To improve the performance of the rails and wheels for the railway industry, new microstructures need to be researched. Nevertheless, the soft region observed in the weld heat-affected zone (HAZ), caused by the spheroidization of cementite, leads to localized loss of hardness. A methodology for calculating the percentage of cementite spheroidization is not well defined in the literature. Accordingly, a new calculating method for determining the spheroidized cementite fraction was proposed through image analysis. This calculation method observes the cementite area/morphology, not the spheroidized cementite gross area. Two starting microstructures (pearlite and lower bainite) were compared in their spheroidization tendency by divorced eutectoid transformation (DET) during a simulated HAZ thermal cycle. The phase transformation kinetics through the heat treatments was also analyzed using high-resolution dilatometry tests. The results showed that the lower bainite has a higher tendency for cementite spheroidization than the pearlite due to its initial configuration of carbides. Furthermore, it was confirmed that the higher the cooling rates, the lower the spheroidization tendency. |
| نوع الوثيقة: |
article |
| وصف الملف: |
electronic resource |
| اللغة: |
English |
| تدمد: |
2238-7854 |
| Relation: |
http://www.sciencedirect.com/science/article/pii/S223878542300087X; https://doaj.org/toc/2238-7854 |
| DOI: |
10.1016/j.jmrt.2023.01.087 |
| URL الوصول: |
https://doaj.org/article/21fb3b941f2648e29141af0e8ead0252 |
| رقم الانضمام: |
edsdoj.21fb3b941f2648e29141af0e8ead0252 |
| قاعدة البيانات: |
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