Dynamic Recrystallization and Metal Flow Behavior of AZ31 Magnesium Alloy Bending Products Processed by Staggered Extrusion
| Autor: | Wen Yong Shi, Xue Wen Li, Feng Li, Wen Bin Fang, Yan Peng Wang |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Quantitative Biology::Biomolecules Materials science business.product_category Mechanical Engineering 02 engineering and technology Bending 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Metal flow Mechanics of Materials 0103 physical sciences Dynamic recrystallization Physics::Accelerator Physics Die (manufacturing) Asymmetric distribution General Materials Science Extrusion Magnesium alloy Composite material 0210 nano-technology business |
| Zdroj: | Journal of Materials Engineering and Performance. 28:3551-3559 |
| ISSN: | 1544-1024 1059-9495 |
| Popis: | Traditional curved products are obtained in two steps, which consist of an extrusion process and a bending process. There are many bottlenecks to this, such as long processing cycle, low efficiency, and difficulty in controlling the product quality. In this paper, a new staggered extrusion (SE) process was proposed to obtain magnesium alloy bending products. Bending products can be extruded by a staggered punch which has a step-like structure at one end. The experimental results show that with increased staggered distance (h) of the punch, the bending height of the bending products increased significantly. Compared with traditional extrusion, the grains of the bending products obtained by SE are refined. The increase in h is one of the reasons for the asymmetric distribution of axial velocity at the die exit of AZ31 magnesium alloy bending products. The asymmetric distribution of the flow velocity field of bending products during SE is one of the contributors for the bending characteristics to the bending products. The SE enables the use of extrusion in many applicable fields and enriches the types of bending products. |
| Databáze: | OpenAIRE |
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