Static softening behaviors of 7055 alloy during the interval time of multi-pass hot compression
| Autor: | Jun-peng Li, Jian Shen, Liang-ming Yan, Bai-ping Mao |
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| Rok vydání: | 2013 |
| Předmět: |
Imagination
Materials science media_common.quotation_subject Alloy Metallurgy Metals and Alloys Nucleation Recrystallization (metallurgy) engineering.material Condensed Matter Physics Microstructure Materials Chemistry engineering Dynamic recrystallization Physical and Theoretical Chemistry Composite material Softening Electron backscatter diffraction media_common |
| Zdroj: | Rare Metals. 32:241-246 |
| ISSN: | 1867-7185 1001-0521 |
| DOI: | 10.1007/s12598-013-0065-6 |
| Popis: | Multipass plain strain compression test of 7055 alloy was carried out on Gleeble 1500D thermomechanical simulator to study the effect of interval time on static softening behavior between two passes. Microstructural features of the alloy deformed with delay times varying from 0 to 180 s after achieving a reduction of ~52 % in the 13 stages was investigated through TEM and EBSD observations. The 14th pass of peak stresses after different delay times were gained. The peak stress decreases with the interstage delay time increasing, but the decreasing trend is gradually slower. Static recovery, metadynamic recrystallization, and/or static recrystallization can be found in the alloy during two passes. The recovery and recrystallization degree increases with longer interstage delay time. The static recovery is the main softening mechanism. Subgrain coalescence and subgrain growth together with particle-stimulated nucleation are the main nucleation mechanisms for static recrystallization. |
| Databáze: | OpenAIRE |
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