| Preparation of semi-solid slurry containing fine and globular particles for wrought aluminum alloy 2024 |
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| 引用本文： | 郭洪民 杨湘杰. Preparation of semi-solid slurry containing fine and globular particles for wrought aluminum alloy 2024[J]. 中国有色金属学会会刊, 2007, 17(4): 799-804. DOI: 10.1016/S1003-6326(07)60177-0 |
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| 作者姓名： | 郭洪民 杨湘杰 |
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| 作者单位： | [1]School of Materials Science and Engineering, Nanchang University, Nanchang 330047, China [2]School of Mechanical and Electronic Engineering, Nanchang University, Nanchang 330047, China |
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| 基金项目： | 国家自然科学基金;江西省自然科学基金 |
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| 摘 要： | The semi-solid slurry of wrought aluminum alloy 2024 was prepared by a well developed rheocasting process, low superheat pouting with shearing field（LSPSF）. The appreciate combination of pouring temperature and rotation speed of barrel, can give rise to a transition of the growth morphology of primary a（Al） from coarse-dendritic to coarse-particle-like and further to fine-globular. The combined effects of both localized rapid cooling and vigorous mixing during the initial stage of solidification can enhance wall nucleation and nuclei survival, which leads to the formation of fine-globular primary a（Al）. By using semi-solid slurry prepared by LSPSF, direct squeeze cast cup-shaped component with improved mechanical properties such as yield strength of 198 MPa, ultimate tensile strength of 306 MPa and elongation of 10.4%, can be obtained.
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| 关 键 词： | 锻造铝合金 半固体金属加工 凝固 微观结构 机械性能 |
| 收稿时间： | 2006-11-09 |
| 修稿时间： | 2006-11-092007-05-08 |
Preparation of semi-solid slurry containing fine and globular particles for wrought aluminum alloy 2024 |
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| GUO Hong-min,YANG Xiang-jie. Preparation of semi-solid slurry containing fine and globular particles for wrought aluminum alloy 2024[J]. Transactions of Nonferrous Metals Society of China, 2007, 17(4): 799-804. DOI: 10.1016/S1003-6326(07)60177-0 |
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| Authors: | GUO Hong-min YANG Xiang-jie |
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| Affiliation: | 1. School of Materials Science and Engineering, Nanchang University, Nanchang 330047, China; 2. School of Mechanical and Electronic Engineering, Nanchang University, Nanchang 330047, China |
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| Abstract: | The semi-solid slurry of wrought aluminum alloy 2024 was prepared by a well developed rheocasting process, low superheat pouring with shearing field(LSPSF). The appreciate combination of pouring temperature and rotation speed of barrel, can give rise to a transition of the growth morphology of primary α(Al) from coarse-dendritic to coarse-particle-like and further to fine-globular. The combined effects of both localized rapid cooling and vigorous mixing during the initial stage of solidification can enhance wall nucleation and nuclei survival, which leads to the formation of fine-globular primary α(Al). By using semi-solid slurry prepared by LSPSF, direct squeeze cast cup-shaped component with improved mechanical properties such as yield strength of 198 MPa, ultimate tensile strength of 306 MPa and elongation of 10.4%, can be obtained. |
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| Keywords: | semi-solid metal processing wrought aluminum alloy solidification microstructure mechanical property |
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