| Effects of cerium on microstructure and mechanical properties of ZK60 alloy |
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| 作者姓名： | 夏长清 王银娜 吴安如 古一 |
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| 作者单位： | School of Materials Science and Engineering, Central South University, Changsha 410083, China |
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| 摘 要： | ZK60-xcerium alloys were studied,where x mass fraction is 0, 0.52%, 0.94%, 1.51% and 1.98%, respectively. Influence of Ce contents and heat-treatment on microstructure and tensile properties was analyzed. The results show that cast ZK60 alloy containing no Ce has coarse crystal grains, and lots of segregation aggregates around the grain-boundary. However, the alloys containing Ce have refined grains, and grain-boundaries are purified at the same time. Obvious dynamic recrystallization occurs in tested alloys after hot-extrusion. Tensile strength heightens with the increase of Ce content, and grows higher after aging at 150℃ for 0 -24 h （T5 treatment）. Comparing tensile properties of investigated alloys in different states, it can be concluded that synthetical properties of the alloy with 1.51% Ce addition is the best of all. In extruded state, σb and δ of this alloy are 318.6 MPa and 14.4%, respectively. After aging for 24 h ,σb is 338.6 MPa and δ is 15.6%.
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| 关 键 词： | 铈 微观结构 铝合金 机械性能 再结晶工艺 |
| 文章编号： | 1005-9784（2005）05-0515-06 |
| 收稿时间： | 2004-12-10 |
| 修稿时间： | 2005-02-15 |
Effects of cerium on microstructure and mechanical properties of ZK60 alloy |
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| Xia Chang-qing , Wang Yin-na , Wu An-ru and Gu Yi.Effects of cerium on microstructure and mechanical properties of ZK60 alloy[J].Journal of Central South University of Technology,2005,12(5):515-520. |
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| Authors: | Xia Chang-qing Wang Yin-na Wu An-ru and Gu Yi |
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| Affiliation: | (1) School of Materials Science and Engineering, Central South University, 410083 Changsha, China |
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| Abstract: | ZK60-xcerium alloys were studied,where x mass fraction is 0, 0.52%, 0.94%, 1.51% and 1.98%, respectively. Influence of Ce contents and heat-treatment on microstructure and tensile properties was analyzed. The results show that cast ZK60 alloy containing no Ce has coarse crystal grains, and lots of segregation aggregates around the grain-boundary. However, the alloys containing Ce have refined grains, and grain-boundaries are purified at the same time. Obvious dynamic recrystallization occurs in tested alloys after hot-extrusion. Tensile strength heightens with the increase of Ce content, and grows higher after aging at 150 ℃ for 0-24 h (T5 treatment). Comparing tensile properties of investigated alloys in different states, it can be concluded that synthetical properties of the alloy with 1.51% Ce addition is the best of all. In extruded state, σb and δ of this alloy are 318.6 MPa and 14.4%, respectively. After aging for 24 h ,σb is 338.6 MPa and δ is 15.6%. |
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| Keywords: | ZK60 alloy Cerium hot-extrusion dynamic recrystallization microstructure mechanical properties |
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