Investigation on strain dependence of metadynamic recrystallization behaviors of GH4169 superalloy
| Autor: | Xiao-Min Chen, Wu-Quan Yuan, Xin-He Li, Yong-Cheng Lin, Ming-Song Chen |
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| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
First pass Materials science Strain (chemistry) Nucleation 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Surfaces Coatings and Films Superalloy 0103 physical sciences Dynamic recrystallization Metadynamic recrystallization Composite material Deformation (engineering) 0210 nano-technology Instrumentation |
| Zdroj: | Vacuum. 149:1-11 |
| ISSN: | 0042-207X |
| Popis: | The metadynamic recrystallization (MDRX) behaviors of a solid-solution GH4169 superalloy were studied by two-pass hot compression tests. The effects of pre-strain (deformation degree of the first pass) on MDRX behaviors were analyzed. Results show that the MDRX behaviors intensely depend on the pre-strain. The MDRX fraction first increases and then drops with the increased pre-strain. This is because a relatively large pre-strain can facilitate the nucleation of dynamic recrystallization (DRX) grains, which promotes the subsequent MDRX behaviors. However, due to the decreased stored deformation energy at relatively high pre-strain, the number of DRX grains cannot continuously increases. Thus, the MDRX fraction is reduced with the further increase of pre-strain. The segmented MDRX kinetics models were proposed and validated to describe the significant strain dependence of MDRX behaviors. |
| Databáze: | OpenAIRE |
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