The effect of Ni depletion on athermal martensitic transformation in 304 austenitic stainless steel
| العنوان: | The effect of Ni depletion on athermal martensitic transformation in 304 austenitic stainless steel |
|---|---|
| المؤلفون: | Tahereh Zargar, Fazlollah Sadeghi, Jong Wan Kim, Yoon-Uk Heo, Chang Hee Yim, Jaesang Lee |
| المصدر: | Materials Characterization. 175:111063 |
| بيانات النشر: | Elsevier BV, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | 010302 applied physics, Austenite, Materials science, Misorientation, Annealing (metallurgy), Mechanical Engineering, Metallurgy, 02 engineering and technology, engineering.material, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, Mechanics of Materials, Diffusionless transformation, Martensite, 0103 physical sciences, engineering, General Materials Science, Austenitic stainless steel, 0210 nano-technology, Crystal twinning, Electron backscatter diffraction |
| الوصف: | Chemical and microstructural analyses were performed on Ni depletion zones in 304 austenitic stainless steel sheets after annealing and cooling with three different rates (0.2, 18.6, 160.0 °C/s). The analysis was focused on the characteristics and the origin of the retained δ-ferrite and α’-martensite phases in the austenite matrix. Simultaneous Ni depletion and Cr enrichment belong to the retained δ-ferrite due to incomplete decomposition after the solidification process. Athermal α’-martensite was observed to grow within Ni-depleted zones with no Cr enrichment. The fraction of α’-martensite increases as the cooling rate increases. EPMA analysis reveals that the 1 wt% reduction of Ni contents to the bulk chemical composition promotes the thermally-activated martensitic transformation. Such athermal martensite tended to grow within twinning boundaries holding the Nishiyama-Wassermann orientation relationship with the austenite matrix confirmed with the electron diffraction patterns in TEM and the misorientation analysis in EBSD. |
| تدمد: | 1044-5803 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::3cdd3e197c30988900cb31fbbfaab235 https://doi.org/10.1016/j.matchar.2021.111063 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........3cdd3e197c30988900cb31fbbfaab235 |
| قاعدة البيانات: | OpenAIRE |
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