Grain refinement tracing of dynamic and metadynamic recrystallization for a Penetrator Steel | ||
| Journal of Ultrafine Grained and Nanostructured Materials | ||
| دوره 57، شماره 1، شهریور 2024، صفحه 75-81 اصل مقاله (1.14 M) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22059/jufgnsm.2024.01.09 | ||
| نویسندگان | ||
| Taher El-Bitar1؛ Maha ElMeligy* 1؛ Wojciech Borek2؛ Saad Ebied3 | ||
| 1Plastic Deformation Dept., Central Metallurgical R&D Institute (CMRDI), 1st El-Felazaat St., Eltabeen, 11722 Helwan, Egypt; | ||
| 2Department of Engineering Materials and Biomaterials, Silesian University of Technology, 18A Konarskiego Street, 44-100 Gliwice, Poland | ||
| 3Production Engineering and Mechanical Design Department, Faculty of Engineering - Tanta University, Tanta 31527, Egypt | ||
| چکیده | ||
| The present investigation is dealing with the evolution of simultaneous dynamic and metadynamic recrystallization (DRX)& (MDRX) phenomena by physical simulation for a 4-strock hot compression process, where flow curves were presented for each stroke. The primary alloy is a penetrator steel containing 0.3% C in addition to some Cr, Mo, Ni and 1.63 W. Calculated grain size after the onest of DRX & occurrence of MDRX decreases continuously with the increase of cumulative strain reaching to 0.289 µm. However, Electron Backscatter Diffraction (EBSD) investigation established that 99% of the grains, after the last compression stroke, were detected as <1.0 μm, with an average grain size 0.31 μm. Microstructure after simulation presents fine lath martensitic structure, coexisting with Cr-W carbides, which are crammed at the inter- martensite laths. Furthermore, 56% of the grains showed grain boundaries misoriention creating High Angle Grain Boundaries (HAGBs), which are promoting MDRX. The flow curve of each stroke definitely contains two complementary microstructure events, namely a DRX , and a MDRX phenomenon, where the peak stress (σp) of DRX is inversely proportional to the mean temperature of stroke. | ||
| کلیدواژهها | ||
| Hot Compression Simulation؛ Dynamic and Metadynamic Recrystallization؛ Electron Back Scatter Diffraction (EBSD)؛ HAGB& LAGB؛ Grain Refinement؛ Penetrator Steel | ||
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آمار تعداد مشاهده مقاله: 810 تعداد دریافت فایل اصل مقاله: 600 |
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