Microstructure evolution and low temperature superplasticity of ZK40 magnesium alloy subjected to ECAP
文献类型：期刊论文
| 作者 | L. Lin ; Z. Liu ; L. J. Chen ; T. Liu ; S. D. Wu |
| 刊名 | Metals and Materials International
 |
| 出版日期 | 2004 |
| 卷号 | 10期号:6页码:501-506 |
| 关键词 | magnesium alloys grain refinement superplasticity ECAP channel angular extrusion nonequilibrium grain-boundaries severe plastic-deformation mechanical-properties az91 magnesium |
| ISSN号 | 1598-9623 |
| 中文摘要 | Microstructure evolution and superplastic behaviors of ZK40 magnesium alloy were investigated in the temperature range of 473similar to623 K. Transmission electron microscopy (TEM) was used to study the microstructure changes. After the alloy had been processed by equal channel angular pressing (ECAP) for one pass through the die, significant twinning was found to have Occurred, and the mean grain size was 5.6 mum. Finer grains were obtained after multi-pass ECAP, and the average grain size of the alloy ECAPed for three passes was as low as 0.8 mum; this alloy exhibited low temperature superplasticity at 473similar to523 K, and the elongations obtained at the initial strain rate of 1 x 10(-3) s(-1) were 260 % at 473 K and 612 % at 523 K. Corresponding values for the ZK40 alloy processed by ECAP for only one pass were 124 % at 473 K and 212 % at 523 K. Poor superplastic behavior of the ZK40 alloy processed by ECAP for only one pass was related to the long-range stresses associated with the non-equilibrium grain boundaries within the coarse grains. The incompatibility between the fine grains and the coarse grains was thought to be unfavorable to the improvement of superplasticity. |
| 原文出处 | |
| 公开日期 | 2012-04-14 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/35446]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | L. Lin,Z. Liu,L. J. Chen,et al. Microstructure evolution and low temperature superplasticity of ZK40 magnesium alloy subjected to ECAP[J]. Metals and Materials International,2004,10(6):501-506. |
| APA | L. Lin,Z. Liu,L. J. Chen,T. Liu,&S. D. Wu.(2004).Microstructure evolution and low temperature superplasticity of ZK40 magnesium alloy subjected to ECAP.Metals and Materials International,10(6),501-506. |
| MLA | L. Lin,et al."Microstructure evolution and low temperature superplasticity of ZK40 magnesium alloy subjected to ECAP".Metals and Materials International 10.6(2004):501-506. |
入库方式： OAI收割
来源：金属研究所
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